openapi: 3.0.1
info:
  title: Freeplay HTTP Agents Completions API
  description: The Freeplay HTTP API provides programmatic access to the Freeplay LLM experimentation, evaluation, and observability platform. It covers prompt template management, recording completions and sessions/traces, curating test cases and datasets, running batch test runs and evaluations, and recording customer and human feedback. The API root is your Freeplay instance URL plus /api/v2. For the standard cloud instance this is https://app.freeplay.ai/api/v2; private/self-hosted instances use a per-account subdomain such as https://{subdomain}.freeplay.ai/api/v2.
  termsOfService: https://freeplay.ai/terms
  contact:
    name: Freeplay Support
    url: https://docs.freeplay.ai/
  version: v2
servers:
- url: https://app.freeplay.ai/api/v2
  description: Freeplay Cloud (standard instance)
- url: https://{subdomain}.freeplay.ai/api/v2
  description: Private / self-hosted instance (per-account subdomain)
  variables:
    subdomain:
      default: app
      description: Your Freeplay account subdomain.
security:
- bearerAuth: []
tags:
- name: Completions
  description: Record completions and aggregate completion statistics.
paths:
  /projects/{project_id}/sessions/{session_id}/completions:
    parameters:
    - $ref: '#/components/parameters/ProjectId'
    - $ref: '#/components/parameters/SessionId'
    post:
      operationId: recordCompletion
      tags:
      - Completions
      summary: Record an LLM completion to a session.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RecordCompletionRequest'
      responses:
        '200':
          description: The recorded completion.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Completion'
  /projects/{project_id}/completions/statistics:
    parameters:
    - $ref: '#/components/parameters/ProjectId'
    post:
      operationId: getCompletionStatistics
      tags:
      - Completions
      summary: Aggregate evaluation statistics across completions.
      requestBody:
        required: false
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/StatisticsRequest'
      responses:
        '200':
          description: Aggregated completion statistics.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Statistics'
  /projects/{project_id}/completions/statistics/{prompt_template_id}:
    parameters:
    - $ref: '#/components/parameters/ProjectId'
    - name: prompt_template_id
      in: path
      required: true
      schema:
        type: string
        format: uuid
    post:
      operationId: getCompletionStatisticsByTemplate
      tags:
      - Completions
      summary: Aggregate evaluation statistics for a specific prompt template.
      requestBody:
        required: false
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/StatisticsRequest'
      responses:
        '200':
          description: Aggregated completion statistics for the prompt template.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Statistics'
components:
  parameters:
    ProjectId:
      name: project_id
      in: path
      required: true
      schema:
        type: string
        format: uuid
      description: The Freeplay project ID.
    SessionId:
      name: session_id
      in: path
      required: true
      schema:
        type: string
        format: uuid
  schemas:
    StatisticsRequest:
      type: object
      properties:
        environment:
          type: string
        start_time:
          type: string
          format: date-time
        end_time:
          type: string
          format: date-time
    Statistics:
      type: object
      properties:
        completion_count:
          type: integer
        evaluations:
          type: object
          additionalProperties: true
    RecordCompletionRequest:
      type: object
      required:
      - messages
      properties:
        messages:
          type: array
          items:
            $ref: '#/components/schemas/Message'
        inputs:
          type: object
          additionalProperties: true
        prompt_template_version_id:
          type: string
          format: uuid
        trace_id:
          type: string
          format: uuid
        start_time:
          type: string
          format: date-time
        end_time:
          type: string
          format: date-time
        model:
          type: string
        provider:
          type: string
        usage:
          $ref: '#/components/schemas/Usage'
        custom_metadata:
          type: object
          additionalProperties: true
    Usage:
      type: object
      properties:
        prompt_tokens:
          type: integer
        completion_tokens:
          type: integer
        total_tokens:
          type: integer
    Completion:
      type: object
      properties:
        completion_id:
          type: string
          format: uuid
        session_id:
          type: string
          format: uuid
        trace_id:
          type: string
          format: uuid
        messages:
          type: array
          items:
            $ref: '#/components/schemas/Message'
        model:
          type: string
        usage:
          $ref: '#/components/schemas/Usage'
    Message:
      type: object
      properties:
        role:
          type: string
          enum:
          - system
          - user
          - assistant
          - tool
        content:
          type: string
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: Authenticate requests using your Freeplay API key as a Bearer token in the Authorization header. API keys are managed at https://app.freeplay.ai/settings/api-access.