# USPS

**Canonical:** https://apis.io/providers/usps/  
**Website:** https://www.usps.com  
**APIs profiled:** 5

The United States Postal Service (USPS) provides a modern suite of RESTful APIs for address validation, domestic and international pricing, shipping label creation and cancellation, tracking, and service standards through its developer portal. The APIs replace the legacy Web Tools platform and use OAuth 2.0 Client Credentials for authentication. The platform supports both production and TEM (Testing Environment for Mailers) endpoints for developing and validating shipping integrations.

## Kin Score — 24.8 / 100 (emerging)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 24.8).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 37.2 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 13.2 |
| Access Clarity | 13.2 |

## Agent readiness — 12.9 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (5)

- **USPS OAuth 2.0** — Token endpoint for OAuth 2.0 Client Credentials authentication used to authorize requests to all USPS API products.
- **USPS Addresses API** — Verify and standardize US addresses to USPS specifications, reducing shipping delays and errors.
- **USPS Tracking API** — Retrieve tracking status and delivery events for shipped packages across USPS services.
- **USPS Labels API** — Create and cancel domestic shipping labels with integrated address standardization, pricing, and manifesting.
- **USPS Domestic Prices API** — Retrieve current pricing information for USPS domestic shipping products and services.

## Security (1)

- **Usps Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Shipping, Postal, Address Validation, Tracking, Labels, Logistics

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/usps/). Scores are computed from the provider's own public artifacts under a published rubric.