openapi: 3.2.0
info:
  title: Imgur Auth API
  version: '3.0'
  description: Imgur is an online image and album hosting platform. The Imgur API (v3) is a RESTful HTTP/JSON API that exposes the platform — uploading, retrieving, voting, commenting, galleries, accounts, and tags. Anonymous reads/writes are supported with a Client-ID, and per-user actions require OAuth2 access tokens.
  contact:
    name: Imgur API Support
    url: https://help.imgur.com/
  license:
    name: Imgur API Terms
    url: https://imgur.com/tos
servers:
- url: https://api.imgur.com
  description: Imgur API root
security:
- ClientId: []
- OAuth2: []
tags:
- name: Auth
  description: OAuth2 token issuance and refresh.
paths:
  /oauth2/authorize:
    get:
      tags:
      - Auth
      summary: Authorize User
      operationId: authorizeUser
      description: Begin the OAuth2 authorization-code or token grant flow.
      parameters:
      - name: client_id
        in: query
        required: true
        schema:
          type: string
      - name: response_type
        in: query
        required: true
        schema:
          type: string
          enum:
          - code
          - token
          - pin
      - name: state
        in: query
        schema:
          type: string
      responses:
        '302':
          description: Redirect To Configured Callback With Code Or Token.
  /oauth2/token:
    post:
      tags:
      - Auth
      summary: Issue Access Token
      operationId: issueAccessToken
      description: Exchange an authorization code, refresh token, or PIN for an access token.
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              required:
              - client_id
              - client_secret
              - grant_type
              properties:
                client_id:
                  type: string
                client_secret:
                  type: string
                grant_type:
                  type: string
                  enum:
                  - authorization_code
                  - refresh_token
                  - pin
                code:
                  type: string
                refresh_token:
                  type: string
                pin:
                  type: string
      responses:
        '200':
          description: New Access Token Issued.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AccessToken'
components:
  schemas:
    AccessToken:
      type: object
      properties:
        access_token:
          type: string
        refresh_token:
          type: string
        expires_in:
          type: integer
        token_type:
          type: string
        account_id:
          type: integer
        account_username:
          type: string
  securitySchemes:
    ClientId:
      type: apiKey
      in: header
      name: Authorization
      description: 'Anonymous access. Header value: `Client-ID <CLIENT_ID>`.'
    OAuth2:
      type: oauth2
      description: Per-user OAuth2 authorization.
      flows:
        authorizationCode:
          authorizationUrl: https://api.imgur.com/oauth2/authorize
          tokenUrl: https://api.imgur.com/oauth2/token
          scopes: {}