# PlateHarbor

> PlateHarbor publishes machine-readable and human-readable guidance for vehicle registration renewal, special title or move situations, and county emissions rules.

## Primary API docs

- [API documentation](https://plateharbor.com/developers/api): Human-readable documentation for developers and AI agents.
- [OpenAPI specification](https://api.plateharbor.com/openapi.json): Machine-readable OpenAPI 3.1 contract for the PlateHarbor API.
- [API landing resource](https://api.plateharbor.com/): API entrypoint with documentation and discovery links.
- [API catalog](https://api.plateharbor.com/.well-known/api-catalog): Linkset describing the service description and service docs.
- [MCP endpoint](https://api.plateharbor.com/mcp): Read-only POST-only JSON-RPC MCP endpoint for tool-based agents.
- [API llms.txt](https://api.plateharbor.com/llms.txt): API-hosted crawler guidance for the PlateHarbor API.
- [API robots.txt](https://api.plateharbor.com/robots.txt): API-hosted crawler rules and sitemap reference.
- [API sitemap](https://api.plateharbor.com/sitemap.xml): API-hosted sitemap for public JSON resources.

## Public endpoints

- [States](https://api.plateharbor.com/api/v1/states): List supported states and county coverage counts.
- [Renewal guide example](https://api.plateharbor.com/api/v1/renewal/colorado): Example state-level renewal rules.
- [Special situation example](https://api.plateharbor.com/api/v1/situations/colorado/new-resident): Example state-level title or move-routing guide.
- [Emissions guide example](https://api.plateharbor.com/api/v1/emissions/arizona/maricopa): Example county-level emissions rules and station details.
- [Checker example](https://api.plateharbor.com/api/v1/check?state=arizona&county=maricopa&vehicle_age=8&fuel_type=gas): Example next-step recommendation.

## Crawlable pages

- [Homepage](https://plateharbor.com/)
- [API docs](https://plateharbor.com/developers/api)
- [About](https://plateharbor.com/about)
- [Methodology](https://plateharbor.com/methodology)
- [Source policy](https://plateharbor.com/source-policy)
- [Editorial policy](https://plateharbor.com/editorial-policy)
- [Sitemap](https://plateharbor.com/sitemap.xml)