# API Documentation

Build with the Synthient API. Explore endpoints, authentication, response formats, and usage limits.

- [IP API](https://docs.synthient.com/ipapi): Look up IPs and domains, send batch requests, and explore the response schema.
- [Account](https://docs.synthient.com/account): Check your organization, granted scopes, and remaining lookup credits.
- [Authentication](https://docs.synthient.com/authentication): Authenticate requests with an API key and understand access scopes.
- [gRPC](https://docs.synthient.com/grpc): Use the gRPC API with server reflection and typed messages.
- [Errors](https://docs.synthient.com/errors): Understand error responses and how to handle each status.
- [Rate Limits](https://docs.synthient.com/rate-limits): Plan around request limits, credit usage, and retry behavior.