# zipcodestack.com

> zipcodestack.com is a free ZIP code lookup API. It provides a well designed REST-API that returns all data in JSON-format.

- Website: https://zipcodestack.com/
- Documentation: https://zipcodestack.com/docs/
- OpenAPI spec: https://zipcodestack.com/docs/openapi.yaml
- Docs llms.txt: https://zipcodestack.com/docs/llms.txt
- Full marketing content: https://zipcodestack.com/llms-full.txt

## Docs
- [API Documentation](https://zipcodestack.com/docs/): Endpoints, authentication, request/response formats and SDKs.
- [OpenAPI 3.1 spec](https://zipcodestack.com/docs/openapi.yaml): Machine-readable definition of every endpoint.
- [MCP server](https://api.zipcodestack.com/mcp): Hosted Model Context Protocol endpoint — AI agents can call the API as native tools (streamable HTTP, `apikey` header).

## Pricing
- [Pricing & Plans | zipcodestack.com](https://zipcodestack.com/pricing/): We believe in fair & transparent pricing. All plans can be upgraded or canceled at any time.

## Product & features
- [MCP Server for AI Agents | zipcodestack.com](https://zipcodestack.com/mcp/): Connect Claude, Cursor and other AI agents directly to the zipcodestack API through our hosted MCP (Model Context Protocol) server.

## Company
- [Attribution | Zipcodestack.com](https://zipcodestack.com/attribution/)
- [Contact us | zipcodestack.com](https://zipcodestack.com/contact/)
- [Imprint | zipcodestack.com](https://zipcodestack.com/imprint/)
- [Privacy Policy | Zipcodestack.com](https://zipcodestack.com/privacy-policy/)
- [Terms of Service | Zipcodestack.com](https://zipcodestack.com/terms-of-service/)