USPS

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.

5 APIs 0 Features

ShippingPostalAddress ValidationTrackingLabelsLogistics

APIs

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.

Resources

Sources

aid: usps
name: USPS
description: >-
  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.
type: Index
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
  - Shipping
  - Postal
  - Address Validation
  - Tracking
  - Labels
  - Logistics
url: >-
  https://raw.githubusercontent.com/api-evangelist/usps/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-11'
specificationVersion: '0.19'
apis:
  - aid: usps:oauth2
    name: USPS OAuth 2.0
    description: >-
      Token endpoint for OAuth 2.0 Client Credentials authentication used to
      authorize requests to all USPS API products.
    humanURL: https://developers.usps.com/Oauth
    baseURL: https://apis.usps.com/oauth2/v3
    tags:
      - OAuth
      - Authentication
    properties:
      - type: Documentation
        url: https://developers.usps.com/Oauth
  - aid: usps:addresses
    name: USPS Addresses API
    description: >-
      Verify and standardize US addresses to USPS specifications, reducing
      shipping delays and errors.
    humanURL: https://developers.usps.com/addressesv3
    baseURL: https://apis.usps.com/addresses/v3
    tags:
      - Address Validation
    properties:
      - type: Documentation
        url: https://developers.usps.com/addressesv3
  - aid: usps:tracking
    name: USPS Tracking API
    description: >-
      Retrieve tracking status and delivery events for shipped packages
      across USPS services.
    humanURL: https://developers.usps.com/trackingv3
    baseURL: https://apis.usps.com/tracking/v3
    tags:
      - Tracking
      - Shipping
    properties:
      - type: Documentation
        url: https://developers.usps.com/trackingv3
  - aid: usps:labels
    name: USPS Labels API
    description: >-
      Create and cancel domestic shipping labels with integrated address
      standardization, pricing, and manifesting.
    humanURL: https://developers.usps.com/labelsv3
    baseURL: https://apis.usps.com/labels/v3
    tags:
      - Labels
      - Shipping
    properties:
      - type: Documentation
        url: https://developers.usps.com/labelsv3
  - aid: usps:prices
    name: USPS Domestic Prices API
    description: >-
      Retrieve current pricing information for USPS domestic shipping
      products and services.
    humanURL: https://developers.usps.com/pricesv3
    baseURL: https://apis.usps.com/prices/v3
    tags:
      - Pricing
      - Shipping
    properties:
      - type: Documentation
        url: https://developers.usps.com/pricesv3

common:
  - type: Website
    url: https://www.usps.com
  - type: Documentation
    url: https://developers.usps.com
  - type: Getting Started
    url: https://developers.usps.com/getting-started
  - type: Sign Up
    url: https://developers.usps.com/apis
  - type: GitHub
    url: https://github.com/USPS/api-examples
maintainers:
  - FN: Kin Lane
    email: [email protected]