# Lectr Docs

## Docs

- [AI Gateway](https://docs.lectr.ai/concepts/ai-gateway.md): What an AI gateway is, why it exists, and where Lectr fits.
- [Architecture](https://docs.lectr.ai/concepts/architecture.md): The system design — hot path, cold path, caches, and workers.
- [Request Lifecycle](https://docs.lectr.ai/concepts/request-lifecycle.md): What happens to a request from the moment it hits Lectr to the moment the response comes back.
- [Anomaly Detection](https://docs.lectr.ai/guides/anomaly-detection.md): Lectr tells you when something changes before your users or your finance team does.
- [Feature Tagging](https://docs.lectr.ai/guides/feature-tagging.md): Break down your AI cost, latency, and reliability by the feature that made each request.
- [Multi-Provider Setup](https://docs.lectr.ai/guides/multi-provider-setup.md): Route OpenAI, Anthropic, Groq, and Gemini through one endpoint.
- [Routing Rules](https://docs.lectr.ai/guides/routing-rules.md): Automatically route requests to the right model and provider — without touching your code.
- [Task Types](https://docs.lectr.ai/guides/task-types.md): One header. Smarter recommendations.
- [Introduction](https://docs.lectr.ai/index.md): What Lectr is, why it exists, and how it works.
- [Quick Start](https://docs.lectr.ai/quickstart.md): Start routing AI traffic through Lectr in under 2 minutes.
- [Error Codes](https://docs.lectr.ai/reference/error-codes.md): What went wrong and what to do about it.
- [Headers](https://docs.lectr.ai/reference/headers.md): Every header Lectr reads and what it does with them.
- [Supported Models & Providers](https://docs.lectr.ai/reference/supported-models-and-providers.md): Every provider and model Lectr knows about.
- [Security & Trust](https://docs.lectr.ai/security/security-and-trust.md): Exactly what Lectr sees, what it stores, and what it never touches.

## OpenAPI Specs

- [openapi](https://docs.lectr.ai/api-reference/openapi.json)