openapi: 3.0.3
info:
  title: Transistor Account Webhooks API
  description: The Transistor API is a public REST API for the Transistor podcast hosting and analytics platform. It follows the JSON:API specification, accepts JSON or form-encoded request bodies, and returns JSON:API resource objects. It supports sparse fieldsets and included related resources. Authentication is via an x-api-key header carrying an API key generated in the Transistor dashboard Account area. The API covers shows, episodes, download analytics, private podcast subscribers, and event webhooks. Requests are rate-limited to 10 requests per 10 seconds; exceeding the limit returns HTTP 429 and blocks access for 10 seconds.
  version: '1.0'
  contact:
    name: Transistor
    url: https://transistor.fm
  termsOfService: https://transistor.fm/legal/
servers:
- url: https://api.transistor.fm/v1
  description: Transistor API v1
security:
- apiKeyAuth: []
tags:
- name: Webhooks
  description: Event webhook subscriptions.
paths:
  /webhooks:
    get:
      operationId: listWebhooks
      tags:
      - Webhooks
      summary: List webhooks
      description: Returns the webhook subscriptions in your account.
      responses:
        '200':
          description: A list of webhook subscriptions.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonApiResourceList'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
    post:
      operationId: createWebhook
      tags:
      - Webhooks
      summary: Subscribe to an event
      description: Registers a webhook that POSTs to a callback URL when an event fires. Supported events include episode_created, episode_published, subscriber_created, and subscriber_deleted.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                event_name:
                  type: string
                  description: The event to subscribe to.
                url:
                  type: string
                  format: uri
                  description: The callback URL that receives the event payload.
                show_id:
                  type: string
                  description: The show the webhook is scoped to.
      responses:
        '201':
          description: The created webhook subscription.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/JsonApiResource'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
  /webhooks/{id}:
    parameters:
    - $ref: '#/components/parameters/ResourceId'
    delete:
      operationId: deleteWebhook
      tags:
      - Webhooks
      summary: Unsubscribe a webhook
      description: Deletes a webhook subscription by ID.
      responses:
        '200':
          description: The webhook subscription was deleted.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
components:
  responses:
    RateLimited:
      description: Too many requests. The API allows 10 requests per 10 seconds; exceeding this blocks access for 10 seconds.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Errors'
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Errors'
  schemas:
    JsonApiResource:
      type: object
      description: A JSON:API single-resource document.
      properties:
        data:
          $ref: '#/components/schemas/ResourceObject'
        included:
          type: array
          items:
            $ref: '#/components/schemas/ResourceObject'
    Errors:
      type: object
      properties:
        errors:
          type: array
          items:
            type: object
            properties:
              status:
                type: string
              title:
                type: string
              detail:
                type: string
    ResourceObject:
      type: object
      description: A JSON:API resource object.
      properties:
        id:
          type: string
        type:
          type: string
        attributes:
          type: object
          additionalProperties: true
        relationships:
          type: object
          additionalProperties: true
    JsonApiResourceList:
      type: object
      description: A JSON:API list document with pagination metadata.
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/ResourceObject'
        meta:
          type: object
          properties:
            currentPage:
              type: integer
            totalPages:
              type: integer
            totalCount:
              type: integer
  parameters:
    ResourceId:
      name: id
      in: path
      required: true
      description: The resource identifier.
      schema:
        type: string
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: API key generated in the Transistor dashboard Account area.