Reddit Messages API

openapi: 3.1.0
info:
  title: Reddit Ads Account Messages API
  description: The Reddit Ads API allows advertisers and their partners to programmatically create, edit, and manage advertising campaigns and audiences on the Reddit platform. It provides endpoints for managing ad accounts, campaigns, ad groups, ads, creatives, targeting, custom audiences, conversion pixels, and reporting. Authentication is handled via OAuth 2.0, and rate limits are set at one request per second.
  version: '3'
  contact:
    name: Reddit Ads Support
    url: https://business.reddithelp.com/s/article/Reddit-Ads-API
  termsOfService: https://business.reddithelp.com/s/article/Reddit-Ads-API-Terms
servers:
- url: https://ads-api.reddit.com/api/v3
  description: Reddit Ads API v3 Production Server
security:
- oauth2: []
tags:
- name: Messages
  description: Endpoints for managing private messages, including inbox, sent, unread messages, composing, and message actions.
paths:
  /message/inbox:
    get:
      operationId: getInbox
      summary: Get Inbox Messages
      description: Returns a listing of the authenticated user's inbox messages, including both private messages and comment replies. Requires the privatemessages OAuth scope.
      tags:
      - Messages
      parameters:
      - $ref: '#/components/parameters/after'
      - $ref: '#/components/parameters/before'
      - $ref: '#/components/parameters/limit'
      - $ref: '#/components/parameters/count'
      - name: mark
        in: query
        description: Whether to mark messages as read.
        schema:
          type: boolean
          default: true
      responses:
        '200':
          description: Listing of inbox messages
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Listing'
  /message/unread:
    get:
      operationId: getUnreadMessages
      summary: Get Unread Messages
      description: Returns a listing of the authenticated user's unread messages. Requires the privatemessages OAuth scope.
      tags:
      - Messages
      parameters:
      - $ref: '#/components/parameters/after'
      - $ref: '#/components/parameters/before'
      - $ref: '#/components/parameters/limit'
      - $ref: '#/components/parameters/count'
      - name: mark
        in: query
        description: Whether to mark messages as read.
        schema:
          type: boolean
          default: true
      responses:
        '200':
          description: Listing of unread messages
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Listing'
  /message/sent:
    get:
      operationId: getSentMessages
      summary: Get Sent Messages
      description: Returns a listing of the authenticated user's sent messages. Requires the privatemessages OAuth scope.
      tags:
      - Messages
      parameters:
      - $ref: '#/components/parameters/after'
      - $ref: '#/components/parameters/before'
      - $ref: '#/components/parameters/limit'
      - $ref: '#/components/parameters/count'
      responses:
        '200':
          description: Listing of sent messages
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Listing'
  /api/compose:
    post:
      operationId: composeMessage
      summary: Compose a Private Message
      description: Sends a private message to another user or a subreddit's moderators. Requires the privatemessages OAuth scope.
      tags:
      - Messages
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              required:
              - to
              - subject
              - text
              properties:
                to:
                  type: string
                  description: The recipient username or /r/subreddit for modmail.
                subject:
                  type: string
                  description: The subject of the message (max 100 characters).
                  maxLength: 100
                text:
                  type: string
                  description: The body of the message (markdown).
                api_type:
                  type: string
                  default: json
      responses:
        '200':
          description: Message sent successfully
        '403':
          description: Permission denied
  /api/read_message:
    post:
      operationId: readMessage
      summary: Mark Messages As Read
      description: Marks one or more messages as read. Requires the privatemessages OAuth scope.
      tags:
      - Messages
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              required:
              - id
              properties:
                id:
                  type: string
                  description: A comma-separated list of message fullnames to mark as read.
      responses:
        '200':
          description: Messages marked as read
  /api/read_all_messages:
    post:
      operationId: readAllMessages
      summary: Mark All Messages As Read
      description: Marks all of the authenticated user's messages as read. Requires the privatemessages OAuth scope.
      tags:
      - Messages
      responses:
        '200':
          description: All messages marked as read
components:
  schemas:
    Thing:
      type: object
      description: A Reddit thing is the base object type. All Reddit objects (comments, links, subreddits, etc.) are things with a kind and data payload.
      properties:
        kind:
          type: string
          description: The kind identifier (t1 for comment, t2 for account, t3 for link, t4 for message, t5 for subreddit, t6 for award).
          enum:
          - t1
          - t2
          - t3
          - t4
          - t5
          - t6
        data:
          type: object
          description: The thing's data payload, varying by kind.
    Listing:
      type: object
      description: A Reddit listing is a paginated collection of things. Listings contain a data object with children and pagination information.
      properties:
        kind:
          type: string
          description: The kind identifier, always "Listing".
          enum:
          - Listing
        data:
          type: object
          properties:
            after:
              type: string
              nullable: true
              description: The fullname of the next item for forward pagination.
            before:
              type: string
              nullable: true
              description: The fullname of the previous item for backward pagination.
            dist:
              type: integer
              description: The number of items in this listing.
            modhash:
              type: string
              description: A modhash for CSRF protection.
            children:
              type: array
              description: The list of things in this listing.
              items:
                $ref: '#/components/schemas/Thing'
  parameters:
    after:
      name: after
      in: query
      description: The fullname of a thing used as an anchor for pagination. Returns results after this item.
      schema:
        type: string
    count:
      name: count
      in: query
      description: A positive integer indicating the number of items already seen in this listing, used for pagination numbering.
      schema:
        type: integer
        minimum: 0
    before:
      name: before
      in: query
      description: The fullname of a thing used as an anchor for pagination. Returns results before this item.
      schema:
        type: string
    limit:
      name: limit
      in: query
      description: The maximum number of items to return (default 25, max 100).
      schema:
        type: integer
        default: 25
        minimum: 1
        maximum: 100
  securitySchemes:
    oauth2:
      type: oauth2
      description: Reddit Ads API uses OAuth 2.0 for authentication. Access tokens are obtained via the authorization code flow.
      flows:
        authorizationCode:
          authorizationUrl: https://www.reddit.com/api/v1/authorize
          tokenUrl: https://www.reddit.com/api/v1/access_token
          scopes:
            ads: Access to ads management endpoints
externalDocs:
  description: Reddit Ads API Documentation
  url: https://ads-api.reddit.com/docs/