# Guide

- [Overview](/docs): Submit a Google search URL to POST /serp and receive structured JSON.
- HTTP API
  - [Authentication](/docs/api/authentication): API key required for all routes except health checks.
  - [Submit search](/docs/api/submit-search): Run a Google Search and wait for structured results.
  - [Stats & health](/docs/api/stats-health): Queue depth, capacity, and liveness.