openapi: 3.0.3
info:
  title: Stream Chat API (Server-side REST) Application Reactions API
  description: 'Server-side REST API for Stream (GetStream.io) Chat. This is a curated subset of Stream''s published Chat protocol (https://getstream.github.io/protocol), grounding the endpoints modeled in the API Evangelist catalog against the real base URL and paths. The Chat API is addressed at https://chat.stream-io-api.com. Every request carries the application `api_key` as a query parameter and is authenticated with a JWT sent in the `Authorization` header together with a `Stream-Auth-Type: jwt` header. Server-side tokens (no `user_id` claim) are used for the operations in this document; client tokens are used to open the real-time WebSocket connection modeled in the companion AsyncAPI document.

    Path and method choices here are taken from Stream''s official chat-openapi.yaml (github.com/GetStream/protocol). Request and response bodies are represented generically; consult the linked protocol reference for the full schemas.'
  version: '1.0'
  contact:
    name: API Evangelist
    url: https://apievangelist.com
    email: kin@apievangelist.com
  license:
    name: API documentation - Stream Terms
    url: https://getstream.io/legal/terms/
servers:
- url: https://chat.stream-io-api.com
  description: Stream Chat API (edge, global)
security:
- JWT: []
  ApiKey: []
tags:
- name: Reactions
  description: Add and remove emoji reactions on messages.
paths:
  /messages/{id}/reaction:
    parameters:
    - $ref: '#/components/parameters/MessageId'
    post:
      operationId: SendReaction
      tags:
      - Reactions
      summary: Send a reaction
      description: Add an emoji reaction to a message, emitting a `reaction.new` event.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                reaction:
                  type: object
                  properties:
                    type:
                      type: string
                      example: like
                    score:
                      type: integer
      responses:
        '201':
          $ref: '#/components/responses/Message'
        '429':
          $ref: '#/components/responses/TooManyRequests'
  /messages/{id}/reaction/{type}:
    parameters:
    - $ref: '#/components/parameters/MessageId'
    - name: type
      in: path
      required: true
      description: The reaction type to remove (e.g. like).
      schema:
        type: string
    delete:
      operationId: DeleteReaction
      tags:
      - Reactions
      summary: Delete a reaction
      description: Remove a user's reaction of a given type from a message.
      responses:
        '200':
          $ref: '#/components/responses/Message'
        '429':
          $ref: '#/components/responses/TooManyRequests'
components:
  responses:
    Message:
      description: A message wrapped in a response envelope.
      content:
        application/json:
          schema:
            type: object
            properties:
              message:
                $ref: '#/components/schemas/Message'
              duration:
                type: string
    TooManyRequests:
      description: Rate limit exceeded for this app, platform, and endpoint. Inspect the X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset headers.
      headers:
        X-RateLimit-Limit:
          schema:
            type: integer
        X-RateLimit-Remaining:
          schema:
            type: integer
        X-RateLimit-Reset:
          schema:
            type: integer
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/APIError'
  parameters:
    MessageId:
      name: id
      in: path
      required: true
      description: The unique id of the message.
      schema:
        type: string
  schemas:
    User:
      type: object
      properties:
        id:
          type: string
        role:
          type: string
        name:
          type: string
        image:
          type: string
        online:
          type: boolean
        last_active:
          type: string
          format: date-time
        created_at:
          type: string
          format: date-time
    APIError:
      type: object
      properties:
        code:
          type: integer
        message:
          type: string
        StatusCode:
          type: integer
        duration:
          type: string
        more_info:
          type: string
    Message:
      type: object
      properties:
        id:
          type: string
        text:
          type: string
        type:
          type: string
          description: regular, ephemeral, error, reply, system, or deleted.
        cid:
          type: string
        user:
          $ref: '#/components/schemas/User'
        parent_id:
          type: string
        reaction_counts:
          type: object
          additionalProperties:
            type: integer
        created_at:
          type: string
          format: date-time
        updated_at:
          type: string
          format: date-time
  securitySchemes:
    JWT:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: 'A Stream JWT sent in the `Authorization` header. Server-side tokens omit the `user_id` claim; a `Stream-Auth-Type: jwt` header must accompany the request.'
    ApiKey:
      type: apiKey
      in: query
      name: api_key
      description: The application API key, sent as the `api_key` query parameter on every request.