PostalCodes.info

Postal-code lookup, search, country exports, and address validation worldwide. PostalCodes.info publishes a same-origin reference API and bulk CSV / JSON / XLSX downloads for 123+ countries, anchored on GeoNames and national open-data feeds, released under the Open Database License (ODbL) 1.0.

PostalCodes.info publishes 3 API contracts indexed on the APIs.io network: Downloads API, Lookup Pages API, and Search API. Tagged areas include Postal Codes, Geocoding, Open Data, Address Validation, and Logistics.

The PostalCodes.info catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

PostalCodes.info’s developer surface includes documentation, GitHub presence, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

33.7/100 thin ▬ flat Agent 22/100 agent aware saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFree

1 published contract

Postal Codes Geocoding Open Data Address Validation Logistics

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 33.7/100 · thin

Contract Quality 13.6 / 21

Developer Ergonomics 1.6 / 17

Access Clarity 4.5 / 17

Operational Transparency 0.6 / 11

Contract Governance 2.8 / 10

Discoverability 4.9 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/postalcodes-info/"><img src="https://apis.io/badge/postalcodes-info/card.svg" alt="PostalCodes.info on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

7 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 9.5 — up to +18.1 composite points
Access Clarity scores 26.3 — up to +14.7 composite points
Operational Transparency scores 5.3 — up to +12.3 composite points

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.

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/postalcodes-info/apis.yml: open an issue on github.com/api-evangelist/postalcodes-info 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 →

Standards implemented 1

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 3

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

PostalCodes.info Downloads API

Country-level CSV, XLSX and JSON exports.

PostalCodes.info Lookup Pages API

Canonical HTML pages for manual review and citation.

PostalCodes.info Search API

Interactive postal-code and locality lookup.

Open Collections 4

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

PostalCodes.info Postal Code Reference Downloads API

OPEN COLLECTION

PostalCodes.info Postal Code Reference Downloads Lookup Pages API

OPEN COLLECTION

PostalCodes.info Postal Code Reference Downloads Search API

OPEN COLLECTION

PostalCodes.info Postal Code Reference API

OPEN COLLECTION

PostalCodes.info API pricing

Not yet checked against PostalCodes.info's own pricing page. Compiled by API Evangelist; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Open Data Public Access free	—

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Postalcodes Info Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Postalcodes Info Rate Limits

0 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

PostalCodes.info

SLA

FinOps 1

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

Postalcodes Info Finops

FINOPS

Semantic Vocabularies 1

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

Postalcodes Info Context

11 classes · 8 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

PostalCodes.info — jsonschema rules

5 rules · 4 warnings 1 info

SPECTRAL

PostalCodes.info API Rules

11 rules · 4 errors 6 warnings 1 info

SPECTRAL

JSON Schema 3

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

Error

1 properties

JSON SCHEMA

PostalRecord

8 properties

JSON SCHEMA

SearchSuggestion

4 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Postalcodes Info Postal Record Structure

0 properties

JSON STRUCTURE

Examples 7

Example request and response payloads for these APIs.

Postalcodes Info Create Download Token Example

6 fields

EXAMPLE

Postalcodes Info Download Country Dataset Example

7 fields

EXAMPLE

Postalcodes Info Get Country Lookup Page Example

6 fields

EXAMPLE

Postalcodes Info Postal Record Example

2 fields

EXAMPLE

Postalcodes Info Preview Country Records Example

5 fields

EXAMPLE

Postalcodes Info Search Postal Codes Example

5 fields

EXAMPLE

Postalcodes Info Search Suggestion Example

2 fields

EXAMPLE

Scroll for all 7

Security Posture 1

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

Postalcodes Info Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Postalcodes Info Agentic Access

5 operations

5 operations · 0 acting

AGENTIC

Resources

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

Dataset Documentation

Dataset Documentation

OpenAPI

OpenAPI

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Contact

Contact

Commercial 6

Pricing, plans, and the legal terms of use

Plans

FinOps

License

License

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 6

Properties that don't map to a standard resource type

DataSources

UpdatePolicy

APIsJSON

Citation

MethodologyNote

CoverageBenchmark

CoverageBenchmark

Source (apis.yml)

aid: postalcodes-info
url: https://raw.githubusercontent.com/api-evangelist/postalcodes-info/refs/heads/main/apis.yml
name: PostalCodes.info
type: Index
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - pablocirre/postalcodes-info-open-data
  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: free
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Free
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/postalcodes-info.png
description: Postal-code lookup, search, country exports, and address validation worldwide. PostalCodes.info publishes a same-origin
  reference API and bulk CSV / JSON / XLSX downloads for 123+ countries, anchored on GeoNames and national open-data feeds,
  released under the Open Database License (ODbL) 1.0.
created: '2026-05-16'
modified: '2026-05-19'
specificationVersion: '0.23'
tags:
- Postal Codes
- Geocoding
- Open Data
- Address Validation
- Logistics
common:
- type: Plans
  url: plans/postalcodes-info-plans-pricing.yml
- type: RateLimits
  url: rate-limits/postalcodes-info-rate-limits.yml
- type: FinOps
  url: finops/postalcodes-info-finops.yml
- type: AgenticAccess
  url: agentic-access/postalcodes-info-agentic-access.yml
- type: DomainSecurity
  url: security/postalcodes-info-domain-security.yml
- url: https://postalcodes.info/
  type: Website
- url: https://postalcodes.info/api
  type: Documentation
- url: https://postalcodes.info/datasets
  type: Dataset Documentation
- url: https://postalcodes.info/openapi.json
  type: OpenAPI
- url: https://postalcodes.info/licensing
  type: License
- url: https://opendatacommons.org/licenses/odbl/1-0/
  type: License
- url: https://postalcodes.info/terms
  type: TermsOfService
- url: https://postalcodes.info/privacy
  type: PrivacyPolicy
- url: https://postalcodes.info/contact
  type: Contact
- url: https://postalcodes.info/data-sources
  type: DataSources
- url: https://postalcodes.info/update-policy
  type: UpdatePolicy
- url: https://raw.githubusercontent.com/PabloCirre/postalcodes-info-open-data/main/apis.json
  type: APIsJSON
- url: https://github.com/PabloCirre/postalcodes-info-open-data
  type: GitHub
- url: https://zenodo.org/records/19493709
  type: Citation
- url: https://zenodo.org/records/19930578
  type: MethodologyNote
- url: https://zenodo.org/records/19930688
  type: CoverageBenchmark
url-source: https://postalcodes.info/
maintainers:
- FN: Pablo Cirre, PostalCodes.info
  url: https://postalcodes.info/contact
  email: social@genera.work
  x-organization: PostalCodes.info (Global Postal Code Repository)
apis:
- aid: postalcodes-info:postalcodes-info-downloads-api
  name: PostalCodes.info Downloads API
  description: Country-level CSV, XLSX and JSON exports.
  humanURL: https://postalcodes.info/api
  tags:
  - Downloads
  properties:
  - type: OpenAPI
    url: openapi/postalcodes-info-downloads-api-openapi.yml
  - type: Documentation
    url: https://postalcodes.info/api
  - type: Dataset Documentation
    url: https://postalcodes.info/datasets
  - type: License
    url: https://opendatacommons.org/licenses/odbl/1-0/
  - type: License
    url: https://postalcodes.info/licensing
  - type: TermsOfService
    url: https://postalcodes.info/terms
  - type: PrivacyPolicy
    url: https://postalcodes.info/privacy
  - type: UpdatePolicy
    url: https://postalcodes.info/update-policy
  - type: DataSources
    url: https://postalcodes.info/data-sources
  - type: Citation
    url: https://zenodo.org/records/19493709
  - type: APIsJSON
    url: https://raw.githubusercontent.com/PabloCirre/postalcodes-info-open-data/main/apis.json
  - type: GitHub
    url: https://github.com/PabloCirre/postalcodes-info-open-data
  - type: SpectralRules
    url: rules/postalcodes-info-rules.yml
  - type: Plans
    url: plans/postalcodes-info-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/postalcodes-info-rate-limits.yml
  - type: FinOps
    url: finops/postalcodes-info-finops.yml
  - type: Vocabulary
    url: vocabulary/postalcodes-info-vocabulary.yml
  - type: JSONLD
    url: json-ld/postalcodes-info-context.jsonld
  - type: JSONSchema
    url: json-schema/postalcodes-info-postal-record-schema.json
  - type: JSONSchema
    url: json-schema/postalcodes-info-search-suggestion-schema.json
  - type: JSONSchema
    url: json-schema/postalcodes-info-error-schema.json
  - type: JSONStructure
    url: json-structure/postalcodes-info-postal-record-structure.json
  - type: Examples
    url: examples/postalcodes-info-search-postal-codes-example.json
  - type: Examples
    url: examples/postalcodes-info-preview-country-records-example.json
  - type: Examples
    url: examples/postalcodes-info-create-download-token-example.json
  - type: Examples
    url: examples/postalcodes-info-download-country-dataset-example.json
  - type: Examples
    url: examples/postalcodes-info-get-country-lookup-page-example.json
  - type: Examples
    url: examples/postalcodes-info-postal-record-example.json
  - type: Examples
    url: examples/postalcodes-info-search-suggestion-example.json
- aid: postalcodes-info:postalcodes-info-lookup-pages-api
  name: PostalCodes.info Lookup Pages API
  description: Canonical HTML pages for manual review and citation.
  humanURL: https://postalcodes.info/api
  tags:
  - Lookup Pages
  properties:
  - type: OpenAPI
    url: openapi/postalcodes-info-lookup-pages-api-openapi.yml
  - type: Documentation
    url: https://postalcodes.info/api
  - type: Dataset Documentation
    url: https://postalcodes.info/datasets
  - type: License
    url: https://opendatacommons.org/licenses/odbl/1-0/
  - type: License
    url: https://postalcodes.info/licensing
  - type: TermsOfService
    url: https://postalcodes.info/terms
  - type: PrivacyPolicy
    url: https://postalcodes.info/privacy
  - type: UpdatePolicy
    url: https://postalcodes.info/update-policy
  - type: DataSources
    url: https://postalcodes.info/data-sources
  - type: Citation
    url: https://zenodo.org/records/19493709
  - type: APIsJSON
    url: https://raw.githubusercontent.com/PabloCirre/postalcodes-info-open-data/main/apis.json
  - type: GitHub
    url: https://github.com/PabloCirre/postalcodes-info-open-data
  - type: SpectralRules
    url: rules/postalcodes-info-rules.yml
  - type: Plans
    url: plans/postalcodes-info-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/postalcodes-info-rate-limits.yml
  - type: FinOps
    url: finops/postalcodes-info-finops.yml
  - type: Vocabulary
    url: vocabulary/postalcodes-info-vocabulary.yml
  - type: JSONLD
    url: json-ld/postalcodes-info-context.jsonld
  - type: JSONSchema
    url: json-schema/postalcodes-info-postal-record-schema.json
  - type: JSONSchema
    url: json-schema/postalcodes-info-search-suggestion-schema.json
  - type: JSONSchema
    url: json-schema/postalcodes-info-error-schema.json
  - type: JSONStructure
    url: json-structure/postalcodes-info-postal-record-structure.json
  - type: Examples
    url: examples/postalcodes-info-search-postal-codes-example.json
  - type: Examples
    url: examples/postalcodes-info-preview-country-records-example.json
  - type: Examples
    url: examples/postalcodes-info-create-download-token-example.json
  - type: Examples
    url: examples/postalcodes-info-download-country-dataset-example.json
  - type: Examples
    url: examples/postalcodes-info-get-country-lookup-page-example.json
  - type: Examples
    url: examples/postalcodes-info-postal-record-example.json
  - type: Examples
    url: examples/postalcodes-info-search-suggestion-example.json
- aid: postalcodes-info:postalcodes-info-search-api
  name: PostalCodes.info Search API
  description: Interactive postal-code and locality lookup.
  humanURL: https://postalcodes.info/api
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/postalcodes-info-search-api-openapi.yml
  - type: Documentation
    url: https://postalcodes.info/api
  - type: Dataset Documentation
    url: https://postalcodes.info/datasets
  - type: License
    url: https://opendatacommons.org/licenses/odbl/1-0/
  - type: License
    url: https://postalcodes.info/licensing
  - type: TermsOfService
    url: https://postalcodes.info/terms
  - type: PrivacyPolicy
    url: https://postalcodes.info/privacy
  - type: UpdatePolicy
    url: https://postalcodes.info/update-policy
  - type: DataSources
    url: https://postalcodes.info/data-sources
  - type: Citation
    url: https://zenodo.org/records/19493709
  - type: APIsJSON
    url: https://raw.githubusercontent.com/PabloCirre/postalcodes-info-open-data/main/apis.json
  - type: GitHub
    url: https://github.com/PabloCirre/postalcodes-info-open-data
  - type: SpectralRules
    url: rules/postalcodes-info-rules.yml
  - type: Plans
    url: plans/postalcodes-info-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/postalcodes-info-rate-limits.yml
  - type: FinOps
    url: finops/postalcodes-info-finops.yml
  - type: Vocabulary
    url: vocabulary/postalcodes-info-vocabulary.yml
  - type: JSONLD
    url: json-ld/postalcodes-info-context.jsonld
  - type: JSONSchema
    url: json-schema/postalcodes-info-postal-record-schema.json
  - type: JSONSchema
    url: json-schema/postalcodes-info-search-suggestion-schema.json
  - type: JSONSchema
    url: json-schema/postalcodes-info-error-schema.json
  - type: JSONStructure
    url: json-structure/postalcodes-info-postal-record-structure.json
  - type: Examples
    url: examples/postalcodes-info-search-postal-codes-example.json
  - type: Examples
    url: examples/postalcodes-info-preview-country-records-example.json
  - type: Examples
    url: examples/postalcodes-info-create-download-token-example.json
  - type: Examples
    url: examples/postalcodes-info-download-country-dataset-example.json
  - type: Examples
    url: examples/postalcodes-info-get-country-lookup-page-example.json
  - type: Examples
    url: examples/postalcodes-info-postal-record-example.json
  - type: Examples
    url: examples/postalcodes-info-search-suggestion-example.json
features:
- Same-origin lookup search across countries, localities and postal codes
- Country preview endpoint returning up to 25,000 records for UI previews
- Bulk country dataset exports in CSV, JSON, and XLSX formats
- Token-gated downloads to prevent hotlinking and abusive scraping
- 123+ country coverage with 1.83M postal records and 99.2% geocoding rate
- WGS84 latitude/longitude on locality centroids (where coverage exists)
- Postal codes preserved as strings to retain leading zeros, spaces, and punctuation
- Annual master snapshot (e.g., 2026.1) plus weekly minor refreshes
- Open Database License (ODbL) 1.0 licensing for redistribution and derivatives
- Public OpenAPI 3.1 specification at /openapi.json
use-cases:
- Address-form autocomplete and validation in e-commerce checkouts
- Postal-code prefix and range lookup for logistics zone normalization
- Geocoding centroids for shipping rate previews and store locator UIs
- Data-quality checks and entity reconciliation in master data pipelines
- Locality and administrative-hierarchy enrichment for CRM and CDP records
- Country onboarding for SaaS apps that need bundled postal references
- Research, education, and benchmarking against open postal corpora
- Citation-grade postal corpora for academic and methodology publications
integrations:
- name: GeoNames
  url: https://www.geonames.org/
  description: Upstream provider of place, administrative hierarchy and WGS84 coordinate fields underpinning most country
    corpora.
- name: Saudi Post (SPL)
  url: https://splonline.com.sa/
  description: Open-data workbooks contributing Saudi Arabia branch postal-code material.
- name: Kazakhstan National Open-Government Postal Index
  url: https://data.egov.kz/
  description: Open-data postal reference for Kazakhstan.
- name: Oracle Cloud
  url: https://www.oracle.com/cloud/
  description: Hosting and CDN infrastructure for postalcodes.info.
- name: Zenodo
  url: https://zenodo.org/
  description: Persistent DOI for dataset snapshots, methodology and coverage benchmarks.
solutions:
- name: E-Commerce Address Validation
  description: Drop-in postal lookup and locality suggestion to clean cart addresses and reduce shipping rejections.
  tags:
  - E-Commerce
  - Address Validation
- name: Logistics Zone Normalization
  description: Country dataset exports to drive carrier zone, postal-prefix and routing tables in fulfillment systems.
  tags:
  - Logistics
  - Geocoding
- name: Master Data Quality
  description: Reference corpora for entity reconciliation and locality enrichment across CRM, CDP and ERP systems.
  tags:
  - Data Quality
  - Master Data Management
- name: Open Research Reference
  description: Citation-grade postal data with Zenodo DOIs supporting reproducible methodology and coverage benchmarks.
  tags:
  - Open Data
  - Research
include: []
x-common:
- type: Vocabulary
  url: vocabulary/postalcodes-info-vocabulary.yml
- type: Plans
  url: plans/postalcodes-info-plans-pricing.yml
- type: RateLimits
  url: rate-limits/postalcodes-info-rate-limits.yml
- type: FinOps
  url: finops/postalcodes-info-finops.yml
x-parent: postalcodes
x-relationship: product

PostalCodes.info API — frequently asked questions

Does PostalCodes.info have an API?

Yes. APIs.io lists 3 APIs from PostalCodes.info, including PostalCodes.info Downloads API, PostalCodes.info Lookup Pages API and PostalCodes.info Search API.

Is there an OpenAPI specification for the PostalCodes.info API?

Yes. APIs.io indexes 3 OpenAPI specifications for PostalCodes.info, each linked for download from this page.

How much does the PostalCodes.info API cost?

APIs.io lists 1 pricing plan for PostalCodes.info, with each plan's price, limits and inclusions under Pricing on this page.

Is the PostalCodes.info API ready for AI agents?

PostalCodes.info has a Kin Score of 33.7 out of 100 (thin) and an Agent Readiness score of 21.8 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/postalcodes-info"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/postalcodes-info/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/postalcodes-info/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.