Freeplay

Freeplay is an LLM product experimentation, evaluation, and observability platform for cross-functional teams. Its HTTP API and SDKs make Freeplay the source of truth for prompt templates, record completions and sessions/traces from production, curate test datasets, run batch test runs and LLM-judge evaluations, and capture human and customer feedback.

4 APIs 0 Features

AILLMEvaluationObservabilityPrompt ManagementExperimentation

APIs

Freeplay Prompt Templates API

Manage versioned prompt templates as the source of truth for an application, including creating templates and versions, retrieving formatted or raw templates by name or ID, depl...

Freeplay Recordings & Sessions API

Record LLM completions back to Freeplay along with the sessions and traces that group related calls for agent workflows, then list, search, and delete sessions and aggregate com...

Freeplay Test Cases & Datasets API

Curate evaluation datasets and their test cases, retrieving dataset metadata and test cases by name or ID and uploading new test cases for use in batch test runs and experiments.

Freeplay Test Runs & Evaluations API

Run batch evaluations against datasets, create and list test runs and retrieve their results, and record completion-level and trace-level customer and human feedback to close th...

Resources

👥

GitHubOrganization

Sources

aid: freeplay
url: https://raw.githubusercontent.com/api-evangelist/freeplay/refs/heads/main/apis.yml
name: Freeplay
kind: company
description: Freeplay is an LLM product experimentation, evaluation, and observability
  platform for cross-functional teams. Its HTTP API and SDKs make Freeplay the source
  of truth for prompt templates, record completions and sessions/traces from production,
  curate test datasets, run batch test runs and LLM-judge evaluations, and capture
  human and customer feedback.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- AI
- LLM
- Evaluation
- Observability
- Prompt Management
- Experimentation
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.19'
apis:
- aid: freeplay:prompt-templates
  name: Freeplay Prompt Templates API
  tags:
  - Prompt Management
  - Templates
  - Versioning
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.freeplay.ai/developer-resources/api-reference
  baseURL: https://app.freeplay.ai/api/v2
  properties:
  - url: https://docs.freeplay.ai/docs/freeplay-sdk
    type: Documentation
  - url: https://docs.freeplay.ai/developer-resources/api-reference
    type: APIReference
  - url: openapi/freeplay-openapi.yml
    type: OpenAPI
  - url: collections/freeplay.postman_collection.json
    type: PostmanCollection
  - url: collections/freeplay.opencollection.json
    type: OpenCollection
  description: Manage versioned prompt templates as the source of truth for an application,
    including creating templates and versions, retrieving formatted or raw templates
    by name or ID, deploying versions to environments, and listing all templates in
    an environment.
- aid: freeplay:recordings-sessions
  name: Freeplay Recordings & Sessions API
  tags:
  - Recordings
  - Sessions
  - Traces
  - Observability
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.freeplay.ai/developer-resources/api-reference
  baseURL: https://app.freeplay.ai/api/v2
  properties:
  - url: https://docs.freeplay.ai/getting-started/integrate
    type: Documentation
  - url: https://docs.freeplay.ai/developer-resources/api-reference
    type: APIReference
  - url: openapi/freeplay-openapi.yml
    type: OpenAPI
  - url: collections/freeplay.postman_collection.json
    type: PostmanCollection
  - url: collections/freeplay.opencollection.json
    type: OpenCollection
  description: Record LLM completions back to Freeplay along with the sessions and
    traces that group related calls for agent workflows, then list, search, and delete
    sessions and aggregate completion statistics for production observability.
- aid: freeplay:test-cases-datasets
  name: Freeplay Test Cases & Datasets API
  tags:
  - Datasets
  - Test Cases
  - Curation
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.freeplay.ai/developer-resources/api-reference
  baseURL: https://app.freeplay.ai/api/v2
  properties:
  - url: https://docs.freeplay.ai/docs/quick-start
    type: Documentation
  - url: https://docs.freeplay.ai/developer-resources/api-reference
    type: APIReference
  - url: openapi/freeplay-openapi.yml
    type: OpenAPI
  - url: collections/freeplay.postman_collection.json
    type: PostmanCollection
  - url: collections/freeplay.opencollection.json
    type: OpenCollection
  description: Curate evaluation datasets and their test cases, retrieving dataset
    metadata and test cases by name or ID and uploading new test cases for use in
    batch test runs and experiments.
- aid: freeplay:test-runs-evaluations
  name: Freeplay Test Runs & Evaluations API
  tags:
  - Evaluations
  - Test Runs
  - Feedback
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.freeplay.ai/developer-resources/api-reference
  baseURL: https://app.freeplay.ai/api/v2
  properties:
  - url: https://freeplay.ai/blog/llm-evaluation
    type: Documentation
  - url: https://docs.freeplay.ai/developer-resources/api-reference
    type: APIReference
  - url: openapi/freeplay-openapi.yml
    type: OpenAPI
  - url: collections/freeplay.postman_collection.json
    type: PostmanCollection
  - url: collections/freeplay.opencollection.json
    type: OpenCollection
  description: Run batch evaluations against datasets, create and list test runs and
    retrieve their results, and record completion-level and trace-level customer and
    human feedback to close the evaluation feedback loop.
common:
- type: GitHubOrganization
  url: https://github.com/freeplayai
- type: LinkedIn
  url: https://www.linkedin.com/company/freeplay-ai
- type: Website
  url: https://freeplay.ai/
- type: Documentation
  url: https://docs.freeplay.ai/
- type: Plans
  url: plans/freeplay-plans-pricing.yml
- type: RateLimits
  url: rate-limits/freeplay-rate-limits.yml
- type: FinOps
  url: finops/freeplay-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com