> ## Documentation Index
> Fetch the complete documentation index at: https://polos.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Register an event trigger for a workflow



## OpenAPI

````yaml api-reference/endpoints/event-triggers/api-reference/openapi.json post /api/v1/event-triggers/register
openapi: 3.1.0
info:
  title: Polos Orchestrator API
  description: API for the Polos durable execution platform for AI agents
  contact:
    name: Polos Team
    url: https://github.com/polos-dev/polos
  license:
    name: ''
  version: 1.0.0
servers:
  - url: /
    description: Current server
security: []
tags:
  - name: Health
    description: Health check endpoints
  - name: Projects
    description: Project management endpoints
  - name: Agents
    description: Agent definition management
  - name: Tools
    description: Tool definition management
  - name: Workflows
    description: Workflow management
  - name: Executions
    description: Workflow execution management
  - name: Traces
    description: Observability traces
  - name: Events
    description: Event publishing and streaming
  - name: Event Triggers
    description: Event-based workflow triggers
  - name: Schedules
    description: Scheduled workflow execution
  - name: Workers
    description: Worker registration and management
  - name: Deployments
    description: Deployment management
paths:
  /api/v1/event-triggers/register:
    post:
      tags:
        - Event Triggers
      summary: Register an event trigger for a workflow
      operationId: register_event_trigger
      parameters:
        - name: X-Project-ID
          in: header
          description: Project ID
          required: true
          schema:
            type: string
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RegisterEventTriggerRequest'
        required: true
      responses:
        '200':
          description: Event trigger registered
        '404':
          description: Project not found
        '500':
          description: Internal server error
      security:
        - bearer_auth: []
        - cookie_auth: []
components:
  schemas:
    RegisterEventTriggerRequest:
      type: object
      description: Request to register an event trigger
      required:
        - workflow_id
        - deployment_id
        - event_topic
        - batch_size
      properties:
        batch_size:
          type: integer
          format: int32
          description: Number of events to batch before triggering
        batch_timeout_seconds:
          type:
            - integer
            - 'null'
          format: int32
          description: Timeout in seconds for batching
        deployment_id:
          type: string
          description: Deployment ID
        event_topic:
          type: string
          description: Topic to listen for events
        queue_name:
          type:
            - string
            - 'null'
          description: Queue name for triggered executions
        workflow_id:
          type: string
          description: Workflow ID to trigger
  securitySchemes:
    bearer_auth:
      type: http
      scheme: bearer
    cookie_auth:
      type: apiKey
      in: cookie
      name: polos_auth

````