# CoachLayer

> The fitness coaching brain, as an API. 8 production-tested fitness-coaching LLM endpoints behind one API key, metered in credits: coach chat, readiness briefs, coach insights, workout analysis, adaptive sessions, weekly reports, video form checks and program import.

Status: live sandbox (v1.0.0). Self-serve [signup](/signup) issues a test key (300 free credits/month, no card); the sandbox runs in test mode and live keys open with the paid tiers. Base URL: https://coachlayer.justzon.com.

## Docs

- [Full API reference for LLMs](/llms-full.txt): every endpoint, schema, credit weight, error and metering semantics in one file, plus the buyer FAQ and every guide page's FAQ
- [OpenAPI 3.1 specification](/openapi.yaml): the machine-readable contract
- [Human API reference](/docs): the rendered documentation
- [Pricing calculator](/calculator): interactive monthly-cost estimate

## Evidence

- [Coaching quality benchmark](/benchmark): production-measured quality, latency and token cost per endpoint, weaknesses published
- [CoachLayer vs building on a frontier model](/compare/build-vs-buy): what the engineering layer is worth, measured
- [CoachLayer vs camera SDKs](/compare/camera-sdks): different jobs, when to buy which
- [CoachLayer vs wearable data APIs](/compare/data-apis): pipes, scores and the coaching layer
- [How much a fitness coaching API costs](/guides/fitness-coaching-api-cost): the whole landscape with sourced list prices
- [How to integrate a coaching API](/guides/fitness-api-integration): where it sits in your stack, auth, rate limits and the full failure table

## Optional

- [Product overview](/): landing page