Neynar App Host API

openapi: 3.0.4
info:
  contact:
    email: team@neynar.com
    name: Neynar
    url: https://neynar.com/
  description: The Neynar API allows you to interact with the Farcaster protocol among other things. See the [Neynar docs](https://docs.neynar.com/reference) for more details.
  title: Neynar Action App Host API
  version: 3.176.0
servers:
- url: https://api.neynar.com
security:
- ApiKeyAuth: []
tags:
- description: Operations related to mini app host notifications
  externalDocs:
    description: More info about mini app host notifications
    url: https://docs.neynar.com/docs/app-host-notifications
  name: App Host
paths:
  /v2/farcaster/app_host/user/event/:
    get:
      description: Returns event object for app host events. Used if the app host intends to sign the event message instead of using Neynar-hosted signers.
      externalDocs:
        url: https://docs.neynar.com/reference/app-host-get-event
      operationId: app-host-get-event
      parameters:
      - description: The domain of the mini app
        in: query
        name: app_domain
        required: true
        schema:
          example: demo.neynar.com
          type: string
      - description: The FID of the user who initiated the event
        in: query
        name: fid
        required: true
        schema:
          minimum: 1
          type: integer
      - description: The type of event
        in: query
        name: event
        required: true
        schema:
          enum:
          - frame_added
          - frame_removed
          - notifications_enabled
          - notifications_disabled
          title: AppHostEventType
          type: string
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AppHostGetEventResponse'
          description: Success
        '400':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorRes'
          description: Bad Request
        '404':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorRes'
          description: Resource not found
        '500':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorRes'
          description: Server Error
      summary: Generate event
      tags:
      - App Host
    post:
      description: Post an app_host event to the domain's webhook. Events such as enabling or disabling notifications for a user. Provide either a signed message or the signer UUID of an authorized neynar-hosted signers.
      externalDocs:
        url: https://docs.neynar.com/reference/app-host-post-event
      operationId: app-host-post-event
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AppHostPostEventReqBody'
        required: true
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AppHostPostEventResponse'
          description: Success
        '400':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorRes'
          description: Bad Request
        '404':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorRes'
          description: Resource not found
        '500':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorRes'
          description: Server Error
        '502':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorRes'
          description: Bad Gateway
      summary: Send event
      tags:
      - App Host
  /v2/farcaster/app_host/user/state/:
    get:
      description: Returns the current notification state for a specific user across all mini app domains in this app host. Shows which domains have notifications enabled.
      externalDocs:
        url: https://docs.neynar.com/reference/app-host-get-user-state
      operationId: app-host-get-user-state
      parameters:
      - description: The FID of the user
        in: query
        name: fid
        required: true
        schema:
          minimum: 1
          type: integer
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AppHostUserStateResponse'
          description: Success
        '400':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorRes'
          description: Bad Request
        '404':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorRes'
          description: Resource not found
        '500':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorRes'
          description: Server Error
      summary: Enabled notifications
      tags:
      - App Host
components:
  schemas:
    Fid:
      description: The unique identifier of a farcaster user or app (unsigned integer)
      example: 3
      format: int32
      minimum: 0
      title: Fid
      type: integer
    AppHostPostEventReqBody:
      anyOf:
      - $ref: '#/components/schemas/SignedMessageBody'
      - $ref: '#/components/schemas/SignerUuidBody'
      description: Request body for app host events. Can either provide a signed_message or a signer_uuid with event details.
      title: AppHostPostEventReqBody
    AppHostUserStateResponse:
      properties:
        notifications_enabled:
          description: List of domains for which notifications are enabled for this user
          items:
            properties:
              domain:
                description: Domain of the mini app
                type: string
              status:
                description: Status of notifications for this domain (usually 'valid')
                type: string
              updated_at:
                description: When the notification preference was last updated
                format: date-time
                type: string
            required:
            - domain
            - status
            - updated_at
            type: object
          type: array
      required:
      - notifications_enabled
      title: AppHostUserStateResponse
      type: object
    SignedMessageBody:
      properties:
        app_domain:
          description: Domain of the mini app
          example: demo.neynar.com
          type: string
        signed_message:
          anyOf:
          - type: string
          - $ref: '#/components/schemas/EncodedJsonFarcasterSignature'
          description: JFS-signed message containing the event payload. The message must be properly signed and contain valid event information.  Can be provided as a single string or json object.
      required:
      - signed_message
      - app_domain
      title: SignedMessageBody
      type: object
    ErrorRes:
      description: Details for the error response
      properties:
        code:
          type: string
        message:
          type: string
        property:
          type: string
        status:
          format: int32
          type: integer
      required:
      - message
      title: ErrorRes
      type: object
    AppHostGetEventResponse:
      properties:
        event:
          description: 'Legacy event type corresponding to the requested event type:

            - frame_added: User adds a mini app to their account

            - frame_removed: User removes a mini app from their account

            - notifications_enabled: User enables notifications for a mini app

            - notifications_disabled: User disables notifications for a mini app'
          type: string
        notificationDetails:
          description: Details for notification setup, only present when event is notifications_enabled
          properties:
            token:
              description: Token to use when sending notifications to this user
              type: string
            url:
              description: URL endpoint for sending notifications
              type: string
          required:
          - url
          - token
          type: object
      required:
      - event
      title: AppHostGetEventResponse
      type: object
    EncodedJsonFarcasterSignature:
      description: Encoded JSON Farcaster signature
      properties:
        header:
          type: string
        payload:
          type: string
        signature:
          type: string
      required:
      - header
      - payload
      - signature
      title: EncodedJsonFarcasterSignature
      type: object
    SignerUUID:
      description: 'UUID of the signer.

        `signer_uuid` is paired with API key, can''t use a `uuid` made with a different API key.'
      example: 19d0c5fd-9b33-4a48-a0e2-bc7b0555baec
      title: SignerUUID
      type: string
    AppHostPostEventResponse:
      properties:
        message:
          example: Successfully processed event
          type: string
        success:
          example: true
          type: boolean
      required:
      - success
      title: AppHostPostEventResponse
      type: object
    SignerUuidBody:
      properties:
        app_domain:
          description: Domain of the mini app
          type: string
        event:
          description: 'Types of events that can occur between a user and an app host:

            - frame_added: User adds a mini app to their account

            - frame_removed: User removes a mini app from their account

            - notifications_enabled: User enables notifications for a mini app

            - notifications_disabled: User disables notifications for a mini app'
          enum:
          - frame_added
          - frame_removed
          - notifications_enabled
          - notifications_disabled
          type: string
        fid:
          $ref: '#/components/schemas/Fid'
        signer_uuid:
          $ref: '#/components/schemas/SignerUUID'
      required:
      - signer_uuid
      - app_domain
      - fid
      - event
      title: SignerUuidBody
      type: object
  securitySchemes:
    ApiKeyAuth:
      description: API key to authorize requests
      in: header
      name: x-api-key
      type: apiKey
      x-default: NEYNAR_API_DOCS