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

# Send Message



## OpenAPI

````yaml /api-reference/openapi.json post /v1/ask-feather/sessions/{session_id}/messages
openapi: 3.1.0
info:
  title: Feather API
  description: >-
    Unified customer experience platform API. Manages identity, conversations,
    memory, agents, procedures, policies, model routing, knowledge bases,
    integrations, and runtime execution.
  version: 1.21.0
servers:
  - url: https://api-sandbox.featherhq.com
    description: Sandbox
  - url: http://localhost:8000
    description: Local dev
security: []
paths:
  /v1/ask-feather/sessions/{session_id}/messages:
    post:
      tags:
        - ask-feather
      summary: Send Message
      operationId: send_message_v1_ask_feather_sessions__session_id__messages_post
      parameters:
        - name: session_id
          in: path
          required: true
          schema:
            type: string
            format: uuid
            title: Session Id
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: >-
                #/components/schemas/src__ask_feather__schemas__SendMessageRequest
      responses:
        '200':
          description: Successful Response
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      security:
        - APIKeyHeader: []
components:
  schemas:
    src__ask_feather__schemas__SendMessageRequest:
      properties:
        content:
          type: string
          minLength: 1
          title: Content
        workflow:
          anyOf:
            - type: string
            - type: 'null'
          title: Workflow
      type: object
      required:
        - content
      title: SendMessageRequest
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError
  securitySchemes:
    APIKeyHeader:
      type: apiKey
      in: header
      name: x-api-key

````