USPS Addresses API

openapi: 3.1.0
info:
  title: USPS Addresses API
  description: >-
    The USPS Addresses API validates and corrects address information, eliminating
    errors, improving package delivery service and package pricing. Supports address
    standardization, city and state lookup, and ZIP Code validation.
  version: '3.0'
  contact:
    name: USPS API Support
    url: https://developers.usps.com/
    email: https://emailus.usps.com/s/web-tools-inquiry
  x-generated-from: documentation
externalDocs:
  description: USPS Addresses API Documentation
  url: https://developers.usps.com/addressesv3
servers:
  - url: https://apis.usps.com
    description: Production
  - url: https://apis-tem.usps.com
    description: Testing Environment for Mailers (TEM)
tags:
  - name: Addresses
    description: Address validation and standardization operations
security:
  - bearerAuth: []
paths:
  /addresses/v3/address:
    get:
      operationId: validateAddress
      summary: USPS Addresses Validate Address
      description: >-
        Validates and standardizes a US address to USPS specifications. Returns
        the corrected address with ZIP+4, delivery point, and associated metadata.
      tags:
        - Addresses
      parameters:
        - name: streetAddress
          in: query
          required: true
          description: Primary street address line.
          schema:
            type: string
          example: '2 Massachusetts Ave NE'
        - name: secondaryAddress
          in: query
          required: false
          description: Secondary address line (apartment, suite, unit, etc.).
          schema:
            type: string
          example: 'Suite 100'
        - name: city
          in: query
          required: false
          description: City name.
          schema:
            type: string
          example: 'Washington'
        - name: state
          in: query
          required: false
          description: Two-letter state abbreviation.
          schema:
            type: string
            maxLength: 2
          example: 'DC'
        - name: ZIPCode
          in: query
          required: false
          description: 5-digit ZIP Code.
          schema:
            type: string
            pattern: '^\d{5}$'
          example: '20212'
        - name: ZIPPlus4
          in: query
          required: false
          description: ZIP+4 Code (4-digit extension).
          schema:
            type: string
            pattern: '^\d{4}$'
          example: '0001'
      responses:
        '200':
          description: Address successfully validated and standardized.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Address'
              examples:
                ValidateAddress200Example:
                  summary: Default validateAddress 200 response
                  x-microcks-default: true
                  value:
                    firm: ''
                    streetAddress: '2 MASSACHUSETTS AVE NE'
                    streetAddressAbbreviation: ''
                    secondaryAddress: ''
                    city: 'WASHINGTON'
                    cityAbbreviation: ''
                    state: 'DC'
                    postalCode: ''
                    province: ''
                    ZIPCode: '20212'
                    ZIPPlus4: '0001'
                    urbanization: ''
                    classificationCode: 'D'
                    DPVConfirmation: 'Y'
                    DPVCMRA: 'N'
                    DPVFootnotes: 'AABB'
        '400':
          description: Bad request - invalid address parameters.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Unauthorized - invalid or missing bearer token.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Too many requests - rate limit exceeded.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '500':
          description: Internal server error.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /addresses/v3/city-state:
    get:
      operationId: getCityState
      summary: USPS Addresses Get City and State by ZIP
      description: >-
        Returns the city and state associated with a given 5-digit ZIP Code.
      tags:
        - Addresses
      parameters:
        - name: ZIPCode
          in: query
          required: true
          description: 5-digit ZIP Code to look up.
          schema:
            type: string
            pattern: '^\d{5}$'
          example: '20212'
      responses:
        '200':
          description: City and state returned successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CityState'
              examples:
                GetCityState200Example:
                  summary: Default getCityState 200 response
                  x-microcks-default: true
                  value:
                    city: 'WASHINGTON'
                    state: 'DC'
                    ZIPCode: '20212'
        '400':
          description: Bad request - invalid ZIP Code.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Unauthorized.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /addresses/v3/zipcode:
    get:
      operationId: getZIPCode
      summary: USPS Addresses Get ZIP Code
      description: >-
        Returns the ZIP Code and ZIP+4 associated with an address. Useful for
        address completion and postage calculation.
      tags:
        - Addresses
      parameters:
        - name: streetAddress
          in: query
          required: true
          description: Primary street address line.
          schema:
            type: string
          example: '2 Massachusetts Ave NE'
        - name: secondaryAddress
          in: query
          required: false
          description: Secondary address line.
          schema:
            type: string
        - name: city
          in: query
          required: true
          description: City name.
          schema:
            type: string
          example: 'Washington'
        - name: state
          in: query
          required: true
          description: Two-letter state abbreviation.
          schema:
            type: string
            maxLength: 2
          example: 'DC'
      responses:
        '200':
          description: ZIP Code returned successfully.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ZIPCodeResult'
              examples:
                GetZIPCode200Example:
                  summary: Default getZIPCode 200 response
                  x-microcks-default: true
                  value:
                    streetAddress: '2 MASSACHUSETTS AVE NE'
                    city: 'WASHINGTON'
                    state: 'DC'
                    ZIPCode: '20212'
                    ZIPPlus4: '0001'
        '400':
          description: Bad request.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Unauthorized.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: OAuth 2.0 Bearer Token obtained from the USPS OAuth API.
  schemas:
    Address:
      type: object
      description: USPS standardized address response.
      properties:
        firm:
          type: string
          description: Company or organization name.
          example: ''
        streetAddress:
          type: string
          description: Standardized primary street address.
          example: '2 MASSACHUSETTS AVE NE'
        streetAddressAbbreviation:
          type: string
          description: Abbreviated street address.
          example: ''
        secondaryAddress:
          type: string
          description: Standardized secondary address.
          example: ''
        city:
          type: string
          description: City name.
          example: 'WASHINGTON'
        cityAbbreviation:
          type: string
          description: City abbreviation if applicable.
          example: ''
        state:
          type: string
          description: Two-letter state code.
          example: 'DC'
        postalCode:
          type: string
          description: Postal code for territories.
          example: ''
        province:
          type: string
          description: Province for international addresses.
          example: ''
        ZIPCode:
          type: string
          description: 5-digit ZIP Code.
          example: '20212'
        ZIPPlus4:
          type: string
          description: ZIP+4 extension code.
          example: '0001'
        urbanization:
          type: string
          description: Puerto Rico urbanization name if applicable.
          example: ''
        classificationCode:
          type: string
          description: Address classification code (D=Default, S=Seasonal).
          example: 'D'
        DPVConfirmation:
          type: string
          description: Delivery Point Validation confirmation (Y/S/D/N).
          example: 'Y'
        DPVCMRA:
          type: string
          description: Commercial Mail Receiving Agency indicator.
          example: 'N'
        DPVFootnotes:
          type: string
          description: DPV footnote codes.
          example: 'AABB'
    CityState:
      type: object
      description: City and state lookup result.
      properties:
        city:
          type: string
          description: City name.
          example: 'WASHINGTON'
        state:
          type: string
          description: Two-letter state abbreviation.
          example: 'DC'
        ZIPCode:
          type: string
          description: The queried ZIP Code.
          example: '20212'
    ZIPCodeResult:
      type: object
      description: ZIP Code lookup result.
      properties:
        streetAddress:
          type: string
          description: Standardized street address.
          example: '2 MASSACHUSETTS AVE NE'
        city:
          type: string
          description: City name.
          example: 'WASHINGTON'
        state:
          type: string
          description: Two-letter state abbreviation.
          example: 'DC'
        ZIPCode:
          type: string
          description: 5-digit ZIP Code.
          example: '20212'
        ZIPPlus4:
          type: string
          description: ZIP+4 Code.
          example: '0001'
    Error:
      type: object
      description: API error response.
      properties:
        apiVersion:
          type: string
          description: API version that returned the error.
          example: '3.0'
        error:
          type: object
          description: Error details.
          properties:
            code:
              type: string
              description: Error code.
              example: 'ADDR_ERR_001'
            message:
              type: string
              description: Human-readable error message.
              example: 'Address not found'
            errors:
              type: array
              description: List of field-level validation errors.
              items:
                type: object
                properties:
                  status:
                    type: string
                    description: HTTP status code as string.
                    example: '400'
                  title:
                    type: string
                    description: Error title.
                    example: 'Invalid ZIP Code'
                  detail:
                    type: string
                    description: Error detail message.
                    example: 'The ZIP Code provided is not valid.'