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

# Record a conversion (deprecated 0.9)

> Deprecated compatibility route. New integrations must submit generic session feedback.



## OpenAPI

````yaml /openapi.yaml post /v1/sessions/{session_id}/conversion
openapi: 3.1.0
info:
  version: 1.0.0
  contact:
    name: Zelinqa
    url: https://docs.zelinqa.ai
  license:
    name: Proprietary — Zelinqa SAS
    identifier: LicenseRef-Zelinqa-Proprietary
  x-contract-status: frozen
  x-jira: NBQ-304
  x-supersedes: openapi/nbq-runtime-v2.openapi.yaml
  x-compatibility-note: docs/api-compat-0.9-to-v1.md
  title: NBQ Engine — API V1
  summary: Public runtime and question-bank configuration contract.
  description: >-
    NBQ Engine's public V1 contract, served from https://api.zelinqa.ai. The
    server resolves the tenant, NBQ instance, and scopes from the API key. Never
    send trusted identity headers from the client. Mutations use
    Idempotency-Key, and existing-session mutations also use state_version.
servers:
  - url: https://api.zelinqa.ai
security:
  - ApiKeyAuth: []
tags:
  - name: sessions
    description: Create, advance, inspect, and close server-side NBQ conversations.
  - name: configuration
    description: Read, edit, audit, compile, and publish a question-bank configuration.
paths:
  /v1/sessions/{session_id}/conversion:
    post:
      tags:
        - legacy
      summary: Record a conversion (deprecated 0.9)
      description: >-
        Deprecated compatibility route. New integrations must submit generic
        session feedback.
      operationId: conversionLegacy
      parameters:
        - $ref: '#/components/parameters/SessionId'
        - name: Idempotency-Key
          in: header
          required: false
          schema:
            type: string
            minLength: 8
            maxLength: 128
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/LegacyConversionRequest'
      responses:
        '202':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/LegacyConversionResponse'
          description: Successful response.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/InsufficientScope'
      deprecated: true
components:
  parameters:
    SessionId:
      name: session_id
      in: path
      required: true
      schema:
        type: string
        minLength: 1
        maxLength: 128
  schemas:
    LegacyConversionRequest:
      type: object
      deprecated: true
      required:
        - outcome
      properties:
        outcome:
          type: string
          enum:
            - purchase
            - lead
            - abandon
            - other
        metadata:
          type: object
          additionalProperties: true
    LegacyConversionResponse:
      type: object
      deprecated: true
      required:
        - conversion_id
        - request_id
      properties:
        conversion_id:
          type: string
        request_id:
          type: string
    ErrorEnvelope:
      type: object
      additionalProperties: false
      required:
        - code
        - message
        - request_id
        - details
      properties:
        code:
          $ref: '#/components/schemas/ErrorCode'
        message:
          type: string
          minLength: 1
        request_id:
          type: string
          minLength: 1
        details:
          type: object
          additionalProperties: true
    ErrorCode:
      type: string
      enum:
        - unauthorized
        - insufficient_scope
        - idempotency_contention
        - state_version_conflict
        - idempotency_key_reused
        - unknown_session
        - invalid_previous_turn
        - constraint_no_match
        - invalid_choice
        - compiled_artifact_unavailable
        - configuration_validation_failed
        - compilation_in_progress
        - unknown_configuration
        - unknown_compilation
  responses:
    Unauthorized:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
      description: Unauthorized.
    InsufficientScope:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorEnvelope'
      description: InsufficientScope.
  securitySchemes:
    ApiKeyAuth:
      type: http
      scheme: bearer
      bearerFormat: NBQ API key

````