> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tai42.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# External interaction mid-form reaction door

> Serve the unauthenticated mid-form reaction door (POST only), under the ticket capability.



## OpenAPI

````yaml /openapi.json post /api/interactions/callback/{ticket}/react
openapi: 3.1.0
info:
  description: The operator HTTP surface served under /api/*.
  title: tai42-skeleton API
  version: 21.5.0
servers: []
security: []
paths:
  /api/interactions/callback/{ticket}/react:
    post:
      tags:
        - interactions
      summary: External interaction mid-form reaction door
      description: >-
        Serve the unauthenticated mid-form reaction door (POST only), under the
        ticket capability.
      operationId: post_api_interactions_callback_ticket_react
      parameters:
        - in: path
          name: ticket
          required: true
          schema:
            type: string
      responses:
        '200':
          content:
            application/json:
              schema:
                properties:
                  data:
                    $ref: '#/components/schemas/InteractionReactionAck'
                required:
                  - data
                type: object
          description: Success.
        '400':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Malformed request.
        '404':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Resource not found.
        '409':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Conflict with the current resource state.
        '413':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Request body too large.
        '502':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Error.
components:
  schemas:
    InteractionReactionAck:
      description: >-
        The reaction door's JSON body: the validated form ``update`` a reaction
        returned.
      properties:
        update:
          additionalProperties: true
          title: Update
          type: object
      required:
        - update
      title: InteractionReactionAck
      type: object
    Error:
      properties:
        code:
          description: >-
            Stable machine-readable reason a client keys a dedicated error state
            on, present on refusals that opt in (e.g. a 501 not-configured
            refusal). Optional: absent when the error carries only a
            human-readable message.
          type: string
        error:
          type: string
      required:
        - error
      type: object

````

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