United States Postal Service

The United States Postal Service (USPS) provides a modern REST API platform at developers.usps.com that gives ecommerce websites, shipping software, and logistics systems access to postal data and services. APIs cover address validation, package tracking, domestic and international shipping labels, pricing, carrier pickup scheduling, location finding, and Informed Delivery campaign management. The legacy Web Tools platform was retired January 25, 2026, with all functionality migrated to the new OAuth 2.0-secured API platform.

United States Postal Service publishes 7 API contracts indexed on the APIs.io network, including Addresses API, Carrier Pickup API, Domestic Prices API, and 4 more. Tagged areas include Government, Postal Service, Shipping, Logistics, and Address Validation.

The United States Postal Service catalog on APIs.io includes 5 JSON-LD contexts and 3 Spectral governance rulesets.

United States Postal Service’s developer surface includes changelog, sandbox, authentication, developer portal, getting-started guide, documentation, FAQ, and 50 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

52.0/100 developing ▲ 18.8 Agent 53/100 agent native Front door AI 1/6 silent Heartbeat 94/100 alive saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

41 published contracts 5 Agent Skills 8 Features 8 Use Cases

GovernmentPostal ServiceShipping Logistics Address Validation Package Tracking

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 52.0/100 · developing

Contract Quality 8.5 / 19

Developer Ergonomics 8.8 / 15

Access Clarity 6.4 / 15

Operational Transparency 4.4 / 10

Contract Governance 4.1 / 9

Discoverability 5.6 / 8

Regulatory Posture 4.3 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 53/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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<a href="https://apis.io/providers/usps/"><img src="https://apis.io/badge/usps/card.svg" alt="United States Postal Service on APIs.io — Kin Score by API Evangelist"></a>

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Pagination +5 pts — share of collection GETs (an array, or one wrapped in data/items/results ...) that declare a page/limit/offset/cursor parameter, a Link header or a next/cursor field; na with no collection GETs Ask about this →
Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified) Ask about this →
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's Ask about this →

3 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 45.4 — up to +13.7 composite points Ask about this →
Access Clarity scores 42.6 — up to +11.5 composite points Ask about this →
Developer Ergonomics scores 58.9 — up to +8.2 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/usps/apis.yml: open an issue on github.com/api-evangelist/usps to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Shipping and Logistics	covered	55.6	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 7

Individual APIs this provider publishes, each with its own machine-readable definition.

United States Postal Service Addresses API

Address validation and standardization operations

United States Postal Service Carrier Pickup API

Schedule and manage USPS carrier pickup requests

United States Postal Service Domestic Prices API

Domestic postage pricing and rate calculation operations

United States Postal Service Files API

The Files API from United States Postal Service — 2 operation(s) for files.

United States Postal Service Listener URL Specification API

The Listener URL Specification API from United States Postal Service — 1 operation(s) for listener url specification.

United States Postal Service Resources API

The Resources API from United States Postal Service — 66 operation(s) for resources.

United States Postal Service Tracking API

Package tracking status and event operations

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Open Collections 8

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

USPS Addresses API

OPEN COLLECTION

USPS Addresses API

OPEN COLLECTION

USPS Addresses Carrier Pickup API

OPEN COLLECTION

USPS Carrier Pickup API

OPEN COLLECTION

USPS Addresses Domestic Prices API

OPEN COLLECTION

USPS Domestic Prices API

OPEN COLLECTION

USPS Addresses Tracking API

OPEN COLLECTION

USPS Tracking API

OPEN COLLECTION

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Agent Skills 5

Packaged agent skills for driving this provider's APIs from an AI assistant.

find-locations-and-delivery-estimates

AGENT SKILL

price-and-label-a-domestic-shipment

AGENT SKILL

schedule-a-carrier-pickup

AGENT SKILL

track-a-package

AGENT SKILL

validate-an-address

AGENT SKILL

United States Postal Service API pricing

Prices published by United States Postal Service.

Plan	Price
Default product	Create a free developer account
Additional API products (Labels and others)	contact us

Plan details, limits and sources →

Rate limits

API product hourly quota: If you have exceeded the quota limit of API calls per hour

Rate-limit details →

Pricing Plans 2

Published pricing tiers and plan structures.

United States Postal Service Plans Pricing

2 plans

PLANS

United States Postal Service Plans Pricing

2 plans

PLANS

Rate Limits 2

Documented rate limits and quota policies.

United States Postal Service Rate Limits

2 limits

RATE LIMITS

United States Postal Service Rate Limits

1 limits

RATE LIMITS

Terms of Service 1

What its API terms permit and prohibit, quoted from its own page.

United States Postal Service

15 quoted statements, read from United States Postal Service's own page on 2026-11-10.

TERMS

Eligibility 1

Who may sign up and where, quoted from its own terms.

United States Postal Service

5 quoted statements, read from United States Postal Service's own page on 2026-11-10.

ELIGIBILITY

AI Preferences 1

Its stance on AI training, inference and agents, quoted from its own pages.

United States Postal Service

2 quoted statements, read from United States Postal Service's own page on 2026-11-10.

AI PREFS

Data License 1

How its data and outputs may be reused, quoted from its own terms.

United States Postal Service

2 quoted statements, read from United States Postal Service's own page on 2026-11-10.

LICENSE

FinOps 1

Cost, billing, and metering signals for API financial operations.

United States Postal Service Finops

FINOPS

Features 8

Notable capabilities this provider offers.

OAuth 2.0 Authentication

Secure API access using industry-standard OAuth 2.0 Client Credentials flow with Bearer Token authentication.

RESTful Architecture

All APIs follow RESTful conventions with JSON request and response bodies.

Sandbox Testing Environment

Testing Environment for Mailers (TEM) at apis-tem.usps.com for safe API testing before going to production.

Address Standardization

USPS Coding Accuracy Support System (CASS) compliant address validation and standardization.

Delivery Point Validation

DPV confirmation codes ensure packages can be delivered to the validated address.

Real-Time Tracking

Live package tracking with scan events, timestamps, and location details from USPS systems.

Webhook Subscriptions

Event-driven subscription APIs for tracking events, adjustments, and disputes delivered via webhooks.

Batch Processing

Support for bulk operations including multiple tracking lookups and SCAN Form generation.

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Semantic Vocabularies 5

JSON-LD contexts and semantic vocabularies used across these APIs.

United States Postal Service Addresses Context

3 classes · 16 properties

JSON-LD

United States Postal Service Carrier Context

5 classes · 17 properties

JSON-LD

United States Postal Service Domestic Context

8 classes · 19 properties

JSON-LD

United States Postal Service Tracking Context

4 classes · 18 properties

JSON-LD

Usps Context

120 classes · 368 properties

JSON-LD

Spectral Rules 3

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

United States Postal Service — united states postal service jsonschema rules

5 rules · 3 warn-severity 2 info-severity

SPECTRAL

United States Postal Service — united states postal service rules

39 rules · 13 error-severity 23 warn-severity 3 info-severity

SPECTRAL

United States Postal Service API Rules

72 rules · 39 error-severity 22 warn-severity 11 info-severity

SPECTRAL

OpenAPI Overlays 30

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

United States Postal Service Addresses Overlay

1 action · documentation · usps-addresses-openapi.yml

DERIVED

United States Postal Service Adjustments Overlay

1 action · documentation · usps-adjustments-openapi.yml

DERIVED

United States Postal Service Appointments Overlay

1 action · documentation · usps-appointments-openapi.yml

DERIVED

United States Postal Service Carrier Pickup Overlay

1 action · documentation · usps-carrier-pickup-openapi.yml

DERIVED

United States Postal Service Containers Overlay

1 action · documentation · usps-containers-openapi.yml

DERIVED

United States Postal Service Domestic Labels Overlay

1 action · documentation · usps-domestic-labels-openapi.yml

DERIVED

United States Postal Service Domestic Prices Overlay

1 action · documentation · usps-domestic-prices-openapi.yml

DERIVED

United States Postal Service Informed Delivery Mail Campaigns Overlay

1 action · documentation · usps-informed-delivery-mail-campaigns-openapi.yml

DERIVED

United States Postal Service Informed Delivery Package Campaigns Overlay

1 action · documentation · usps-informed-delivery-package-campaigns-openapi.yml

DERIVED

United States Postal Service International Labels Overlay

1 action · documentation · usps-international-labels-openapi.yml

DERIVED

United States Postal Service International Service Standards Overlay

1 action · documentation · usps-international-service-standards-openapi.yml

DERIVED

United States Postal Service Locations Overlay

1 action · documentation · usps-locations-openapi.yml

DERIVED

United States Postal Service Logistics Shipments Overlay

1 action · documentation · usps-logistics-shipments-openapi.yml

DERIVED

United States Postal Service Payments Overlay

1 action · documentation · usps-payments-openapi.yml

DERIVED

United States Postal Service Pmod Overlay

1 action · documentation · usps-pmod-openapi.yml

DERIVED

United States Postal Service Qr Codes Overlay

1 action · documentation · usps-qr-codes-openapi.yml

DERIVED

United States Postal Service Reconciliation Adjustments Overlay

1 action · documentation · usps-reconciliation-adjustments-openapi.yml

DERIVED

United States Postal Service Scan Forms Overlay

1 action · documentation · usps-scan-forms-openapi.yml

DERIVED

United States Postal Service Service Standards Directory Overlay

1 action · documentation · usps-service-standards-directory-openapi.yml

DERIVED

United States Postal Service Service Standards Overlay

1 action · documentation · usps-service-standards-openapi.yml

DERIVED

United States Postal Service Ship Enrollment Overlay

1 action · documentation · usps-ship-enrollment-openapi.yml

DERIVED

United States Postal Service Shipping Options Overlay

1 action · documentation · usps-shipping-options-openapi.yml

DERIVED

United States Postal Service Subscriptions Adjustments Overlay

1 action · documentation · usps-subscriptions-adjustments-openapi.yml

DERIVED

United States Postal Service Subscriptions Disputes Overlay

1 action · documentation · usps-subscriptions-disputes-openapi.yml

DERIVED

United States Postal Service Subscriptions Package Transaction Details Overlay

1 action · documentation · usps-subscriptions-package-transaction-details-openapi.yml

DERIVED

United States Postal Service Subscriptions Tracking Overlay

1 action · documentation · usps-subscriptions-tracking-openapi.yml

DERIVED

United States Postal Service Subscriptions Tracking V3R2 Overlay

1 action · documentation · usps-subscriptions-tracking-v3r2-openapi.yml

DERIVED

United States Postal Service Subscriptions Unpaid Packages Overlay

1 action · documentation · usps-subscriptions-unpaid-packages-openapi.yml

DERIVED

United States Postal Service Tracking Overlay

1 action · documentation · usps-tracking-openapi.yml

DERIVED

United States Postal Service Tracking V3R2 Overlay

1 action · documentation · usps-tracking-v3r2-openapi.yml

DERIVED

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JSON Schema 117

Standalone JSON Schema definitions for this provider's data models.

Address

16 properties

JSON SCHEMA

CityState

3 properties

JSON SCHEMA

ZIPCodeResult

5 properties

JSON SCHEMA

PickupAddress

5 properties

JSON SCHEMA

PickupPackage

2 properties

JSON SCHEMA

PickupRequest

6 properties

JSON SCHEMA

PickupResponse

4 properties

JSON SCHEMA

PickupUpdateRequest

4 properties

JSON SCHEMA

BaseRateRequest

10 properties

JSON SCHEMA

ExtraServiceRateRequest

5 properties

JSON SCHEMA

ExtraServiceRateResponse

1 properties

JSON SCHEMA

RateResponse

1 properties

JSON SCHEMA

TotalRateRequest

8 properties

JSON SCHEMA

TotalRateResponse

1 properties

JSON SCHEMA

MultipleTrackingRequest

1 properties

JSON SCHEMA

MultipleTrackingResult

1 properties

JSON SCHEMA

TrackingEvent

11 properties

JSON SCHEMA

TrackingResult

2 properties

JSON SCHEMA

Address Subscription Event

5 properties

JSON SCHEMA

Subscription

10 properties

JSON SCHEMA

Subscription Event

5 properties

JSON SCHEMA

Subscription

11 properties

JSON SCHEMA

Adjustments

0 properties

JSON SCHEMA

Appointment

20 properties

JSON SCHEMA

Authorization Code Credentials Token Request

6 properties

JSON SCHEMA

International Base Rates Query

15 properties

JSON SCHEMA

CampaignDetailsResponse

2 properties

JSON SCHEMA

CampaignEditResponse

35 properties

JSON SCHEMA

CampaignEdit

17 properties

JSON SCHEMA

Campaign

35 properties

JSON SCHEMA

Cancel Label Response

3 properties

JSON SCHEMA

Cancellation Request

7 properties

JSON SCHEMA

Cancellation Response

8 properties

JSON SCHEMA

Change Of Address Search Request

7 properties

JSON SCHEMA

Client Application Token Response

11 properties

JSON SCHEMA

Client Credentials Token Request

4 properties

JSON SCHEMA

CloseODContainerRequest

3 properties

JSON SCHEMA

Change of Address Subscription Event

6 properties

JSON SCHEMA

Subscription

10 properties

JSON SCHEMA

ContainerIDPackagesBody

2 properties

JSON SCHEMA

Container

16 properties

JSON SCHEMA

Create OD Container Request

16 properties

JSON SCHEMA

Create OD Container Response for `multipart/form-data`.

5 properties

JSON SCHEMA

DetailSuccessResponse

2 properties

JSON SCHEMA

Subscription Event

5 properties

JSON SCHEMA

Subscription

11 properties

JSON SCHEMA

Parcel Drop Shipment Facility Location

12 properties

JSON SCHEMA

EditPackageCampaignResponse

25 properties

JSON SCHEMA

EditPackageCampaign

11 properties

JSON SCHEMA

Enrollment Request

1 properties

JSON SCHEMA

Enrollment Statuses

1 properties

JSON SCHEMA

Estimates

0 properties

JSON SCHEMA

International Extra Service Rate Query

11 properties

JSON SCHEMA

Indicia IMB Response

3 properties

JSON SCHEMA

Indicia Request

2 properties

JSON SCHEMA

Indicia Response

3 properties

JSON SCHEMA

International Package Request

6 properties

JSON SCHEMA

International Package Response

4 properties

JSON SCHEMA

International Package Response for `application/vnd.usps.labels+json` and `application/vnd.usps.labels+xml`.

16 properties

JSON SCHEMA

International Letter Rates Query

10 properties

JSON SCHEMA

International Rate List Query

12 properties

JSON SCHEMA

Label Metadata

23 properties

JSON SCHEMA

Label Package Response for `multipart/form-data`.

7 properties

JSON SCHEMA

Domestic Package Request

7 properties

JSON SCHEMA

Label Package Response for `application/vnd.usps.labels+json` and `application/vnd.usps.labels+xml`.

27 properties

JSON SCHEMA

Hypermedia Links

0 properties

JSON SCHEMA

Mailer Response

1 properties

JSON SCHEMA

Manifest

2 properties

JSON SCHEMA

NoQRCodeResponse

3 properties

JSON SCHEMA

OptionsRequest

0 properties

JSON SCHEMA

OptionsResponse

0 properties

JSON SCHEMA

PackageCampaign

25 properties

JSON SCHEMA

Subscription Event

5 properties

JSON SCHEMA

Subscription

11 properties

JSON SCHEMA

Pagination Metadata

6 properties

JSON SCHEMA

Parcel Locker Location

0 properties

JSON SCHEMA

Interested parties identity information

2 properties

JSON SCHEMA

Payment Account

6 properties

JSON SCHEMA

Post Office Location

15 properties

JSON SCHEMA

QRCodeRequest

2 properties

JSON SCHEMA

QRCodeResponse

11 properties

JSON SCHEMA

QueryString

2 properties

JSON SCHEMA

ReconciliationAdjustments

0 properties

JSON SCHEMA

Records Response

8 properties

JSON SCHEMA

Refresh Token Credentials Request

5 properties

JSON SCHEMA

Resource Owner/User Claims

4 properties

JSON SCHEMA

Resource Owner Token Response

16 properties

JSON SCHEMA

Returns Package Request

7 properties

JSON SCHEMA

Scan Event Extract Subscription Event

5 properties

JSON SCHEMA

SCAN Form

11 properties

JSON SCHEMA

SCAN Form

2 properties

JSON SCHEMA

SCAN Form Vendor Response

13 properties

JSON SCHEMA

ServiceStandardsResponse

8 properties

JSON SCHEMA

Shipment Tracking Event

12 properties

JSON SCHEMA

Signed URL Response

4 properties

JSON SCHEMA

SinglePackageCampaignResponse

25 properties

JSON SCHEMA

Slot Availability

26 properties

JSON SCHEMA

Slots

1 properties

JSON SCHEMA

Standards

0 properties

JSON SCHEMA

Subscription List

0 properties

JSON SCHEMA

SummarySuccessResponse

5 properties

JSON SCHEMA

Token Revocation Request

2 properties

JSON SCHEMA

Total Rate Details

1 properties

JSON SCHEMA

Total Rates Query

18 properties

JSON SCHEMA

Tracking Information Fields

55 properties

JSON SCHEMA

Tracking Notification Acknowledgment

2 properties

JSON SCHEMA

Tracking Notification Request

8 properties

JSON SCHEMA

Subscription Event

5 properties

JSON SCHEMA

TrackingNumberPartialSuccessResponse

1 properties

JSON SCHEMA

Proof of delivery request

17 properties

JSON SCHEMA

Proof of Delivery Response

2 properties

JSON SCHEMA

Subscription

11 properties

JSON SCHEMA

Summary Tracking Information

6 properties

JSON SCHEMA

Subscription Event

5 properties

JSON SCHEMA

Subscription

11 properties

JSON SCHEMA

URI String

0 properties

JSON SCHEMA

Zip5CodesResponse

2 properties

JSON SCHEMA

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JSON Structure 18

JSON Structure definitions describing this provider's data shapes.

Addresses Address Structure

16 properties

JSON STRUCTURE

Addresses City State Structure

3 properties

JSON STRUCTURE

Addresses Zip Code Result Structure

5 properties

JSON STRUCTURE

Carrier Pickup Pickup Address Structure

5 properties

JSON STRUCTURE

Carrier Pickup Pickup Package Structure

2 properties

JSON STRUCTURE

Carrier Pickup Pickup Request Structure

6 properties

JSON STRUCTURE

Carrier Pickup Pickup Response Structure

4 properties

JSON STRUCTURE

Carrier Pickup Pickup Update Request Structure

4 properties

JSON STRUCTURE

Domestic Prices Base Rate Request Structure

10 properties

JSON STRUCTURE

Domestic Prices Extra Service Rate Request Structure

5 properties

JSON STRUCTURE

Domestic Prices Extra Service Rate Response Structure

1 properties

JSON STRUCTURE

Domestic Prices Rate Response Structure

1 properties

JSON STRUCTURE

Domestic Prices Total Rate Request Structure

8 properties

JSON STRUCTURE

Domestic Prices Total Rate Response Structure

1 properties

JSON STRUCTURE

Tracking Multiple Tracking Request Structure

1 properties

JSON STRUCTURE

Tracking Multiple Tracking Result Structure

1 properties

JSON STRUCTURE

Tracking Tracking Event Structure

11 properties

JSON STRUCTURE

Tracking Tracking Result Structure

2 properties

JSON STRUCTURE

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Examples 18

Example request and response payloads for these APIs.

Addresses Address Example

16 fields

EXAMPLE

Addresses City State Example

3 fields

EXAMPLE

Addresses Zip Code Result Example

5 fields

EXAMPLE

Carrier Pickup Pickup Address Example

5 fields

EXAMPLE

Carrier Pickup Pickup Package Example

2 fields

EXAMPLE

Carrier Pickup Pickup Request Example

6 fields

EXAMPLE

Carrier Pickup Pickup Response Example

4 fields

EXAMPLE

Carrier Pickup Pickup Update Request Example

4 fields

EXAMPLE

Domestic Prices Base Rate Request Example

10 fields

EXAMPLE

Domestic Prices Extra Service Rate Request Example

5 fields

EXAMPLE

Domestic Prices Extra Service Rate Response Example

1 fields

EXAMPLE

Domestic Prices Rate Response Example

1 fields

EXAMPLE

Domestic Prices Total Rate Request Example

8 fields

EXAMPLE

Domestic Prices Total Rate Response Example

1 fields

EXAMPLE

Tracking Multiple Tracking Request Example

1 fields

EXAMPLE

Tracking Multiple Tracking Result Example

1 fields

EXAMPLE

Tracking Tracking Event Example

11 fields

EXAMPLE

Tracking Tracking Result Example

2 fields

EXAMPLE

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Security Posture 4

Authentication, domain security, vulnerability disclosure, and trust-center signals.

United States Postal Service Authentication

http · 1 scheme

SECURITY

United States Postal Service Authentication

http/oauth2 · 4 schemes

SECURITY

United States Postal Service Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

United States Postal Service Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

United States Postal Service Scopes

44 scopes · clientCredentials/authorizationCode

44 scopes

SCOPES

Agentic Access (API Evangelist recommendations) 1

Recommended x-agentic-access execution contracts for AI agents.

United States Postal Service Agentic Access

12 operations · 3 acting

AGENTIC

Use Cases 8

What developers build with this provider.

E-Commerce Shipping Integration

Calculate shipping rates, generate labels, and provide package tracking directly within e-commerce checkout flows.

Address Verification at Checkout

Validate and standardize customer addresses during checkout to reduce failed deliveries and return rates.

Shipping Label Generation

Programmatically create domestic and international USPS shipping labels with barcodes for fulfillment operations.

Carrier Pickup Automation

Schedule and manage USPS carrier pickups automatically based on order fulfillment triggers.

Logistics Rate Shopping

Compare USPS service options and pricing to select the most cost-effective shipping method.

Delivery Time Estimation

Display accurate expected delivery dates to customers using USPS service standards data.

Post Office Finder

Help customers locate the nearest USPS facility for drop-offs or in-person services.

Informed Delivery Campaigns

Enhance customer engagement by adding digital content to mail pieces viewed through Informed Delivery.

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Integrations 6

Pre-built integrations with other platforms and tools.

Shopify

USPS shipping integration available through Shopify Shipping for label generation and rate calculation.

WooCommerce

WooCommerce shipping plugins integrate USPS APIs for rate calculation and label printing.

Magento

Adobe Commerce and Magento integrate USPS for shipping rate display and fulfillment.

ShipStation

ShipStation multi-carrier shipping platform integrates USPS APIs for ecommerce fulfillment.

EasyPost

EasyPost shipping API aggregator provides access to USPS services alongside other carriers.

Stamps.com

Stamps.com and Pitney Bowes shipping platforms integrate USPS APIs for postage and label printing.

Resources

Get Started 4

Portal, sign-up, and the first successful call

Sandbox

Portal

GettingStarted

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

AIPreferences

AIPreferences

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

WellKnown

WellKnown

AgenticAccess

AgenticAccess

Design & Contract 14

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

Spectral

JSONLD

Vocabulary

DataModel

Idempotency

Conventions

Lifecycle

ErrorCatalog

ErrorCatalog

Conformance

SpectralRules

Vocabulary

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Build 3

SDKs, sample code, and the tooling you integrate with

IntegrationEdges

IntegrationEdges

GitHubOrganization

GitHubOrganization

GitHubRepository

GitHubRepository

Access & Security 5

Authentication, authorization, and security posture

Authentication

OAuthScopes

DomainSecurity

DomainSecurity

Authentication

Learn 1

Tutorials, courses, talks, and written guidance

YouTube

YouTube

Operate 8

Status, limits, changes, and where to get help

RateLimits

ChangeLog

Deprecation

StatusPage

RateLimits

FAQ

Support

ContactUs

Scroll for all 8

Commercial 7

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

TermsOfService

UsageTerms

DataLicense

PrivacyPolicy

Scroll for all 7

Company 5

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Newsroom

Newsroom

Twitter

Twitter

Other 5

Properties that don't map to a standard resource type

Overlay

Hosts

Vendors

Leadership

Eligibility

Source (apis.yml)

name: United States Postal Service
description: The United States Postal Service (USPS) provides a modern REST API platform at developers.usps.com that gives
  ecommerce websites, shipping software, and logistics systems access to postal data and services. APIs cover address validation,
  package tracking, domestic and international shipping labels, pricing, carrier pickup scheduling, location finding, and
  Informed Delivery campaign management. The legacy Web Tools platform was retired January 25, 2026, with all functionality
  migrated to the new OAuth 2.0-secured API platform.
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - usps/api-examples
  open_source: unknown
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - openapi
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: high
  probe_state: covered
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/united-states-postal-service.png
url: https://raw.githubusercontent.com/api-evangelist/usps/refs/heads/main/apis.yml
created: '2024-01-01'
modified: '2026-11-11'
specificationVersion: '0.23'
x-docs-platform: redocly
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-17
tags:
- Government
- Postal Service
- Shipping
- Logistics
- Address Validation
- Package Tracking
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
common:
- type: RateLimits
  url: rate-limits/usps-rate-limits.yml
- type: Plans
  url: plans/usps-plans-pricing.yml
- type: Spectral
  url: rules/usps-rules.yml
- type: Spectral
  url: rules/united-states-postal-service-spectral-rules.yml
- type: Spectral
  url: rules/united-states-postal-service-jsonschema-spectral-rules.yml
- type: JSONLD
  url: json-ld/usps-context.jsonld
- type: Vocabulary
  url: vocabulary/usps-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/usps-data-model.yml
- type: ChangeLog
  url: changelog/usps-changelog.yml
- type: Idempotency
  url: conventions/usps-conventions.yml
- type: Conventions
  url: conventions/usps-conventions.yml
- type: Sandbox
  url: sandbox/usps-sandbox.yml
- type: Deprecation
  url: https://postalpro.usps.com/mnt/glusterfs/2026-11/USPS%20APIs%202026%20November%20Release%20Notes.pdf
- type: StatusPage
  url: https://developers.usps.com/status
- type: Lifecycle
  url: lifecycle/usps-lifecycle.yml
- type: ErrorCatalog
  url: errors/usps-error-codes.yml
- type: ErrorCatalog
  url: errors/usps-problem-types.yml
- type: Conformance
  url: conformance/usps-conformance.yml
- type: Overlay
  url: overlays/usps-addresses-overlay.yaml
- type: WellKnown
  url: well-known/usps-well-known.yml
- type: Hosts
  url: hosts/usps-hosts.yml
- type: IntegrationEdges
  url: integrations/usps-integration-edges.yml
- type: Vendors
  url: vendors/usps-vendors.yml
- type: Leadership
  url: https://about.usps.com/who/leadership
- type: Authentication
  url: authentication/usps-authentication.yml
- type: OAuthScopes
  url: scopes/usps-scopes.yml
- type: DomainSecurity
  url: security/usps-domain-security.yml
- type: Plans
  url: plans/united-states-postal-service-plans-pricing.yml
- type: RateLimits
  url: rate-limits/united-states-postal-service-rate-limits.yml
- type: FinOps
  url: finops/united-states-postal-service-finops.yml
- type: Website
  url: https://www.usps.com/
- type: AgenticAccess
  url: agentic-access/united-states-postal-service-agentic-access.yml
- type: DomainSecurity
  url: security/united-states-postal-service-domain-security.yml
- type: Authentication
  url: authentication/united-states-postal-service-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/usps
- type: Portal
  url: https://developers.usps.com/
- type: GettingStarted
  url: https://developers.usps.com/getting-started
- type: Documentation
  url: https://developers.usps.com/apis
- type: TermsOfService
  url: https://developers.usps.com/terms-and-conditions
- type: FAQ
  url: https://developers.usps.com/faq
- type: Support
  url: https://emailus.usps.com/s/web-tools-inquiry
- type: GitHubOrganization
  url: https://github.com/USPS
- type: GitHubRepository
  url: https://github.com/USPS/api-examples
- type: Blog
  url: https://about.usps.com/news/latestnews.rss
- type: Features
  data:
  - name: OAuth 2.0 Authentication
    description: Secure API access using industry-standard OAuth 2.0 Client Credentials flow with Bearer Token authentication.
  - name: RESTful Architecture
    description: All APIs follow RESTful conventions with JSON request and response bodies.
  - name: Sandbox Testing Environment
    description: Testing Environment for Mailers (TEM) at apis-tem.usps.com for safe API testing before going to production.
  - name: Address Standardization
    description: USPS Coding Accuracy Support System (CASS) compliant address validation and standardization.
  - name: Delivery Point Validation
    description: DPV confirmation codes ensure packages can be delivered to the validated address.
  - name: Real-Time Tracking
    description: Live package tracking with scan events, timestamps, and location details from USPS systems.
  - name: Webhook Subscriptions
    description: Event-driven subscription APIs for tracking events, adjustments, and disputes delivered via webhooks.
  - name: Batch Processing
    description: Support for bulk operations including multiple tracking lookups and SCAN Form generation.
- type: UseCases
  data:
  - name: E-Commerce Shipping Integration
    description: Calculate shipping rates, generate labels, and provide package tracking directly within e-commerce checkout
      flows.
  - name: Address Verification at Checkout
    description: Validate and standardize customer addresses during checkout to reduce failed deliveries and return rates.
  - name: Shipping Label Generation
    description: Programmatically create domestic and international USPS shipping labels with barcodes for fulfillment operations.
  - name: Carrier Pickup Automation
    description: Schedule and manage USPS carrier pickups automatically based on order fulfillment triggers.
  - name: Logistics Rate Shopping
    description: Compare USPS service options and pricing to select the most cost-effective shipping method.
  - name: Delivery Time Estimation
    description: Display accurate expected delivery dates to customers using USPS service standards data.
  - name: Post Office Finder
    description: Help customers locate the nearest USPS facility for drop-offs or in-person services.
  - name: Informed Delivery Campaigns
    description: Enhance customer engagement by adding digital content to mail pieces viewed through Informed Delivery.
- type: Integrations
  data:
  - name: Shopify
    description: USPS shipping integration available through Shopify Shipping for label generation and rate calculation.
  - name: WooCommerce
    description: WooCommerce shipping plugins integrate USPS APIs for rate calculation and label printing.
  - name: Magento
    description: Adobe Commerce and Magento integrate USPS for shipping rate display and fulfillment.
  - name: ShipStation
    description: ShipStation multi-carrier shipping platform integrates USPS APIs for ecommerce fulfillment.
  - name: EasyPost
    description: EasyPost shipping API aggregator provides access to USPS services alongside other carriers.
  - name: Stamps.com
    description: Stamps.com and Pitney Bowes shipping platforms integrate USPS APIs for postage and label printing.
- type: SpectralRules
  url: rules/united-states-postal-service-spectral-rules.yml
- type: Vocabulary
  url: vocabulary/united-states-postal-service-vocabulary.yaml
- type: UsageTerms
  url: terms/usps-terms-of-service.yml
- type: Eligibility
  url: eligibility/usps-eligibility.yml
- type: AIPreferences
  url: ai-preferences/usps-ai-preferences.yml
- type: DataLicense
  url: data-license/usps-data-license.yml
- type: PrivacyPolicy
  url: https://about.usps.com/who/legal/privacy-policy/
- type: SignUp
  url: https://cop.usps.com/
- type: ContactUs
  url: https://developers.usps.com/contact-us
- type: Newsroom
  url: https://about.usps.com/newsroom
- type: Twitter
  url: https://x.com/USPS
- type: YouTube
  url: https://www.youtube.com/usps
apis:
- aid: usps:usps-addresses-api
  name: United States Postal Service Addresses API
  description: Address validation and standardization operations
  humanURL: https://developers.usps.com/Oauth
  baseURL: https://apis.usps.com
  tags:
  - Addresses
  properties:
  - type: OpenAPI
    url: openapi/usps-addresses-api-openapi.yml
  - type: Documentation
    url: https://developers.usps.com/Oauth
  - type: Authentication
    url: https://developers.usps.com/getting-started
  - type: Documentation
    url: https://developers.usps.com/addressesv3
  - type: JSONStructure
    url: json-structure/addresses-address-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-addresses-context.jsonld
  - type: Examples
    url: examples/addresses-address-example.json
  - type: Documentation
    url: https://developers.usps.com/adjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/appointmentsv3
  - type: Documentation
    url: https://developers.usps.com/carrierpickupv3
  - type: JSONStructure
    url: json-structure/carrier-pickup-pickup-request-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-carrier-context.jsonld
  - type: Examples
    url: examples/carrier-pickup-pickup-request-example.json
  - type: Documentation
    url: https://developers.usps.com/containersv3
  - type: Documentation
    url: https://developers.usps.com/domesticlabelsv3
  - type: Documentation
    url: https://developers.usps.com/domesticpricesv3
  - type: JSONStructure
    url: json-structure/domestic-prices-base-rate-request-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-domestic-context.jsonld
  - type: Examples
    url: examples/domestic-prices-base-rate-request-example.json
  - type: Documentation
    url: https://developers.usps.com/informeddeliverymailcampaignsv3
  - type: Documentation
    url: https://developers.usps.com/informeddeliverypackagecampaignsv3
  - type: Documentation
    url: https://developers.usps.com/internationallabelsv3-comingsoon
  - type: Documentation
    url: https://developers.usps.com/internationalpricesv3
  - type: Documentation
    url: https://developers.usps.com/internationalstandardsv3
  - type: Documentation
    url: https://developers.usps.com/locationsv3
  - type: Documentation
    url: https://developers.usps.com/logistics-shipmentsv3
  - type: Documentation
    url: https://developers.usps.com/ncoav3
  - type: Documentation
    url: https://developers.usps.com/paymentsv3
  - type: Documentation
    url: https://developers.usps.com/pmodv3
  - type: Documentation
    url: https://developers.usps.com/qrcodesv3
  - type: Documentation
    url: https://developers.usps.com/reconciliationadjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/scanv3
  - type: Documentation
    url: https://developers.usps.com/service-standards-file-download-v3
  - type: Documentation
    url: https://developers.usps.com/servicestandardsdirectoryv3
  - type: Documentation
    url: https://developers.usps.com/shipenrollmentv3
  - type: Documentation
    url: https://developers.usps.com/shippingoptionsv3
  - type: Documentation
    url: https://developers.usps.com/standardsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-addressesv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-adjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-disputesv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-ncoav3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-package-transaction-detailsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-trackingv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-trackingv3r2
  - type: Documentation
    url: https://developers.usps.com/subscriptions-unpaid-packagesv3
  - type: Documentation
    url: https://developers.usps.com/trackingv3
  - type: Documentation
    url: https://developers.usps.com/trackingv3r2
  - type: JSONStructure
    url: json-structure/tracking-tracking-event-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-tracking-context.jsonld
  - type: Examples
    url: examples/tracking-tracking-event-example.json
  - type: Documentation
    url: https://developers.usps.com/userinfov3
  - type: JSONSchema
    url: json-schema/addresses-address-schema.json
  - type: JSONSchema
    url: json-schema/addresses-city-state-schema.json
- aid: usps:usps-carrier-pickup-api
  name: United States Postal Service Carrier Pickup API
  description: Schedule and manage USPS carrier pickup requests
  humanURL: https://developers.usps.com/Oauth
  baseURL: https://apis.usps.com
  tags:
  - Carrier Pickup
  properties:
  - type: OpenAPI
    url: openapi/usps-carrier-pickup-api-openapi.yml
  - type: Documentation
    url: https://developers.usps.com/Oauth
  - type: Authentication
    url: https://developers.usps.com/getting-started
  - type: Documentation
    url: https://developers.usps.com/addressesv3
  - type: JSONStructure
    url: json-structure/addresses-address-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-addresses-context.jsonld
  - type: Examples
    url: examples/addresses-address-example.json
  - type: Documentation
    url: https://developers.usps.com/adjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/appointmentsv3
  - type: Documentation
    url: https://developers.usps.com/carrierpickupv3
  - type: JSONStructure
    url: json-structure/carrier-pickup-pickup-request-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-carrier-context.jsonld
  - type: Examples
    url: examples/carrier-pickup-pickup-request-example.json
  - type: Documentation
    url: https://developers.usps.com/containersv3
  - type: Documentation
    url: https://developers.usps.com/domesticlabelsv3
  - type: Documentation
    url: https://developers.usps.com/domesticpricesv3
  - type: JSONStructure
    url: json-structure/domestic-prices-base-rate-request-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-domestic-context.jsonld
  - type: Examples
    url: examples/domestic-prices-base-rate-request-example.json
  - type: Documentation
    url: https://developers.usps.com/informeddeliverymailcampaignsv3
  - type: Documentation
    url: https://developers.usps.com/informeddeliverypackagecampaignsv3
  - type: Documentation
    url: https://developers.usps.com/internationallabelsv3-comingsoon
  - type: Documentation
    url: https://developers.usps.com/internationalpricesv3
  - type: Documentation
    url: https://developers.usps.com/internationalstandardsv3
  - type: Documentation
    url: https://developers.usps.com/locationsv3
  - type: Documentation
    url: https://developers.usps.com/logistics-shipmentsv3
  - type: Documentation
    url: https://developers.usps.com/ncoav3
  - type: Documentation
    url: https://developers.usps.com/paymentsv3
  - type: Documentation
    url: https://developers.usps.com/pmodv3
  - type: Documentation
    url: https://developers.usps.com/qrcodesv3
  - type: Documentation
    url: https://developers.usps.com/reconciliationadjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/scanv3
  - type: Documentation
    url: https://developers.usps.com/service-standards-file-download-v3
  - type: Documentation
    url: https://developers.usps.com/servicestandardsdirectoryv3
  - type: Documentation
    url: https://developers.usps.com/shipenrollmentv3
  - type: Documentation
    url: https://developers.usps.com/shippingoptionsv3
  - type: Documentation
    url: https://developers.usps.com/standardsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-addressesv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-adjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-disputesv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-ncoav3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-package-transaction-detailsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-trackingv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-trackingv3r2
  - type: Documentation
    url: https://developers.usps.com/subscriptions-unpaid-packagesv3
  - type: Documentation
    url: https://developers.usps.com/trackingv3
  - type: Documentation
    url: https://developers.usps.com/trackingv3r2
  - type: JSONStructure
    url: json-structure/tracking-tracking-event-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-tracking-context.jsonld
  - type: Examples
    url: examples/tracking-tracking-event-example.json
  - type: Documentation
    url: https://developers.usps.com/userinfov3
  - type: JSONSchema
    url: json-schema/carrier-pickup-pickup-request-schema.json
- aid: usps:usps-domestic-prices-api
  name: United States Postal Service Domestic Prices API
  description: Domestic postage pricing and rate calculation operations
  humanURL: https://developers.usps.com/Oauth
  baseURL: https://apis.usps.com
  tags:
  - Domestic Prices
  properties:
  - type: OpenAPI
    url: openapi/usps-domestic-prices-api-openapi.yml
  - type: Documentation
    url: https://developers.usps.com/Oauth
  - type: Authentication
    url: https://developers.usps.com/getting-started
  - type: Documentation
    url: https://developers.usps.com/addressesv3
  - type: JSONStructure
    url: json-structure/addresses-address-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-addresses-context.jsonld
  - type: Examples
    url: examples/addresses-address-example.json
  - type: Documentation
    url: https://developers.usps.com/adjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/appointmentsv3
  - type: Documentation
    url: https://developers.usps.com/carrierpickupv3
  - type: JSONStructure
    url: json-structure/carrier-pickup-pickup-request-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-carrier-context.jsonld
  - type: Examples
    url: examples/carrier-pickup-pickup-request-example.json
  - type: Documentation
    url: https://developers.usps.com/containersv3
  - type: Documentation
    url: https://developers.usps.com/domesticlabelsv3
  - type: Documentation
    url: https://developers.usps.com/domesticpricesv3
  - type: JSONStructure
    url: json-structure/domestic-prices-base-rate-request-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-domestic-context.jsonld
  - type: Examples
    url: examples/domestic-prices-base-rate-request-example.json
  - type: Documentation
    url: https://developers.usps.com/informeddeliverymailcampaignsv3
  - type: Documentation
    url: https://developers.usps.com/informeddeliverypackagecampaignsv3
  - type: Documentation
    url: https://developers.usps.com/internationallabelsv3-comingsoon
  - type: Documentation
    url: https://developers.usps.com/internationalpricesv3
  - type: Documentation
    url: https://developers.usps.com/internationalstandardsv3
  - type: Documentation
    url: https://developers.usps.com/locationsv3
  - type: Documentation
    url: https://developers.usps.com/logistics-shipmentsv3
  - type: Documentation
    url: https://developers.usps.com/ncoav3
  - type: Documentation
    url: https://developers.usps.com/paymentsv3
  - type: Documentation
    url: https://developers.usps.com/pmodv3
  - type: Documentation
    url: https://developers.usps.com/qrcodesv3
  - type: Documentation
    url: https://developers.usps.com/reconciliationadjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/scanv3
  - type: Documentation
    url: https://developers.usps.com/service-standards-file-download-v3
  - type: Documentation
    url: https://developers.usps.com/servicestandardsdirectoryv3
  - type: Documentation
    url: https://developers.usps.com/shipenrollmentv3
  - type: Documentation
    url: https://developers.usps.com/shippingoptionsv3
  - type: Documentation
    url: https://developers.usps.com/standardsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-addressesv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-adjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-disputesv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-ncoav3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-package-transaction-detailsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-trackingv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-trackingv3r2
  - type: Documentation
    url: https://developers.usps.com/subscriptions-unpaid-packagesv3
  - type: Documentation
    url: https://developers.usps.com/trackingv3
  - type: Documentation
    url: https://developers.usps.com/trackingv3r2
  - type: JSONStructure
    url: json-structure/tracking-tracking-event-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-tracking-context.jsonld
  - type: Examples
    url: examples/tracking-tracking-event-example.json
  - type: Documentation
    url: https://developers.usps.com/userinfov3
  - type: JSONSchema
    url: json-schema/domestic-prices-base-rate-request-schema.json
- aid: usps:usps-files-api
  name: United States Postal Service Files API
  description: The Files API from United States Postal Service — 2 operation(s) for files.
  humanURL: https://developers.usps.com/Oauth
  baseURL: https://apis.usps.com/locations/v3
  tags:
  - File
  tags_raw:
  - Files
  properties:
  - type: OpenAPI
    url: openapi/usps-files-api-openapi.yml
  - type: Documentation
    url: https://developers.usps.com/Oauth
  - type: Authentication
    url: https://developers.usps.com/getting-started
  - type: Documentation
    url: https://developers.usps.com/addressesv3
  - type: JSONStructure
    url: json-structure/addresses-address-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-addresses-context.jsonld
  - type: Examples
    url: examples/addresses-address-example.json
  - type: Documentation
    url: https://developers.usps.com/adjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/appointmentsv3
  - type: Documentation
    url: https://developers.usps.com/carrierpickupv3
  - type: JSONStructure
    url: json-structure/carrier-pickup-pickup-request-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-carrier-context.jsonld
  - type: Examples
    url: examples/carrier-pickup-pickup-request-example.json
  - type: Documentation
    url: https://developers.usps.com/containersv3
  - type: Documentation
    url: https://developers.usps.com/domesticlabelsv3
  - type: Documentation
    url: https://developers.usps.com/domesticpricesv3
  - type: JSONStructure
    url: json-structure/domestic-prices-base-rate-request-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-domestic-context.jsonld
  - type: Examples
    url: examples/domestic-prices-base-rate-request-example.json
  - type: Documentation
    url: https://developers.usps.com/informeddeliverymailcampaignsv3
  - type: Documentation
    url: https://developers.usps.com/informeddeliverypackagecampaignsv3
  - type: Documentation
    url: https://developers.usps.com/internationallabelsv3-comingsoon
  - type: Documentation
    url: https://developers.usps.com/internationalpricesv3
  - type: Documentation
    url: https://developers.usps.com/internationalstandardsv3
  - type: Documentation
    url: https://developers.usps.com/locationsv3
  - type: Documentation
    url: https://developers.usps.com/logistics-shipmentsv3
  - type: Documentation
    url: https://developers.usps.com/ncoav3
  - type: Documentation
    url: https://developers.usps.com/paymentsv3
  - type: Documentation
    url: https://developers.usps.com/pmodv3
  - type: Documentation
    url: https://developers.usps.com/qrcodesv3
  - type: Documentation
    url: https://developers.usps.com/reconciliationadjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/scanv3
  - type: Documentation
    url: https://developers.usps.com/service-standards-file-download-v3
  - type: Documentation
    url: https://developers.usps.com/servicestandardsdirectoryv3
  - type: Documentation
    url: https://developers.usps.com/shipenrollmentv3
  - type: Documentation
    url: https://developers.usps.com/shippingoptionsv3
  - type: Documentation
    url: https://developers.usps.com/standardsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-addressesv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-adjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-disputesv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-ncoav3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-package-transaction-detailsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-trackingv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-trackingv3r2
  - type: Documentation
    url: https://developers.usps.com/subscriptions-unpaid-packagesv3
  - type: Documentation
    url: https://developers.usps.com/trackingv3
  - type: Documentation
    url: https://developers.usps.com/trackingv3r2
  - type: JSONStructure
    url: json-structure/tracking-tracking-event-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-tracking-context.jsonld
  - type: Examples
    url: examples/tracking-tracking-event-example.json
  - type: Documentation
    url: https://developers.usps.com/userinfov3
  - type: JSONSchema
    url: json-schema/usps-signed-urlresponse-schema.json
  - type: JSONSchema
    url: json-schema/usps-links-schema.json
- aid: usps:usps-listener-url-specification-api
  name: United States Postal Service Listener URL Specification API
  description: The Listener URL Specification API from United States Postal Service — 1 operation(s) for listener url specification.
  humanURL: https://developers.usps.com/Oauth
  baseURL: https://apis.usps.com/subscriptions-adjustments/v3
  tags:
  - Listener URL Specification
  properties:
  - type: OpenAPI
    url: openapi/usps-listener-url-specification-api-openapi.yml
  - type: Documentation
    url: https://developers.usps.com/Oauth
  - type: Authentication
    url: https://developers.usps.com/getting-started
  - type: Documentation
    url: https://developers.usps.com/addressesv3
  - type: JSONStructure
    url: json-structure/addresses-address-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-addresses-context.jsonld
  - type: Examples
    url: examples/addresses-address-example.json
  - type: Documentation
    url: https://developers.usps.com/adjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/appointmentsv3
  - type: Documentation
    url: https://developers.usps.com/carrierpickupv3
  - type: JSONStructure
    url: json-structure/carrier-pickup-pickup-request-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-carrier-context.jsonld
  - type: Examples
    url: examples/carrier-pickup-pickup-request-example.json
  - type: Documentation
    url: https://developers.usps.com/containersv3
  - type: Documentation
    url: https://developers.usps.com/domesticlabelsv3
  - type: Documentation
    url: https://developers.usps.com/domesticpricesv3
  - type: JSONStructure
    url: json-structure/domestic-prices-base-rate-request-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-domestic-context.jsonld
  - type: Examples
    url: examples/domestic-prices-base-rate-request-example.json
  - type: Documentation
    url: https://developers.usps.com/informeddeliverymailcampaignsv3
  - type: Documentation
    url: https://developers.usps.com/informeddeliverypackagecampaignsv3
  - type: Documentation
    url: https://developers.usps.com/internationallabelsv3-comingsoon
  - type: Documentation
    url: https://developers.usps.com/internationalpricesv3
  - type: Documentation
    url: https://developers.usps.com/internationalstandardsv3
  - type: Documentation
    url: https://developers.usps.com/locationsv3
  - type: Documentation
    url: https://developers.usps.com/logistics-shipmentsv3
  - type: Documentation
    url: https://developers.usps.com/ncoav3
  - type: Documentation
    url: https://developers.usps.com/paymentsv3
  - type: Documentation
    url: https://developers.usps.com/pmodv3
  - type: Documentation
    url: https://developers.usps.com/qrcodesv3
  - type: Documentation
    url: https://developers.usps.com/reconciliationadjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/scanv3
  - type: Documentation
    url: https://developers.usps.com/service-standards-file-download-v3
  - type: Documentation
    url: https://developers.usps.com/servicestandardsdirectoryv3
  - type: Documentation
    url: https://developers.usps.com/shipenrollmentv3
  - type: Documentation
    url: https://developers.usps.com/shippingoptionsv3
  - type: Documentation
    url: https://developers.usps.com/standardsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-addressesv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-adjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-disputesv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-ncoav3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-package-transaction-detailsv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-trackingv3
  - type: Documentation
    url: https://developers.usps.com/subscriptions-trackingv3r2
  - type: Documentation
    url: https://developers.usps.com/subscriptions-unpaid-packagesv3
  - type: Documentation
    url: https://developers.usps.com/trackingv3
  - type: Documentation
    url: https://developers.usps.com/trackingv3r2
  - type: JSONStructure
    url: json-structure/tracking-tracking-event-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-tracking-context.jsonld
  - type: Examples
    url: examples/tracking-tracking-event-example.json
  - type: Documentation
    url: https://developers.usps.com/userinfov3
  - type: JSONSchema
    url: json-schema/usps-links-schema.json
  - type: JSONSchema
    url: json-schema/usps-adjustment-notification-schema.json
- aid: usps:usps-resources-api
  name: United States Postal Service Resources API
  description: The Resources API from United States Postal Service — 66 operation(s) for resources.
  humanURL: https://developers.usps.com/Oauth
  baseURL: https://apis.usps.com/addresses/v3
  tags:
  - Resources
  properties:
  - type: OpenAPI
    url: openapi/usps-resources-api-openapi.yml
  - type: Documentation
    url: https://developers.usps.com/Oauth
  - type: Authentication
    url: https://developers.usps.com/getting-started
  - type: Documentation
    url: https://developers.usps.com/addressesv3
  - type: JSONStructure
    url: json-structure/addresses-address-structure.json
  - type: JSONLD
    url: json-ld/united-states-postal-service-addresses-context.jsonld
  - type: Examples
    url: examples/addresses-address-example.json
  - type: Documentation
    url: https://developers.usps.com/adjustmentsv3
  - type: Documentation
    url: https://developers.usps.com/appointmentsv3
  - type: Documentation
    url: https://developers.usps.com/carrierpickupv3
  - type: JSONStructure
    url: json-structure/carrier-pickup-pickup-request-structure.json


# --- truncated at 32 KB (45 KB total) ---
# Full source: https://artifacts.apis.io/usps/apis.yml

United States Postal Service API — frequently asked questions

Does United States Postal Service have an API?

Yes. APIs.io lists 7 APIs from United States Postal Service, including United States Postal Service Addresses API, United States Postal Service Carrier Pickup API and United States Postal Service Domestic Prices API, and 4 more.

Is there an OpenAPI specification for the United States Postal Service API?

Yes. APIs.io indexes 7 OpenAPI specifications for United States Postal Service, each linked for download from this page.

How do I authenticate with the United States Postal Service API?

United States Postal Service documents its authentication (http · 1 scheme). The details are profiled on APIs.io as United States Postal Service Authentication.

How much does the United States Postal Service API cost?

United States Postal Service publishes its prices; its Default product plan is Create a free developer account as of 2026-11-11. APIs.io lists 4 pricing plans for United States Postal Service, with each plan's price, limits and inclusions under Pricing on this page.

Is the United States Postal Service API ready for AI agents?

United States Postal Service has a Kin Score of 52.0 out of 100 (developing) and an Agent Readiness score of 52.8 (agent-native), scored by API Evangelist on 2026-11-13.

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