# RFC 9110 - HTTP Semantics

**Canonical:** https://apis.io/apis/restful/http-rfc-9110/  
**Provider:** RESTful — https://apis.io/providers/restful/  
**Documentation:** https://datatracker.ietf.org/doc/html/rfc9110

RFC 9110 - HTTP Semantics is one of 5 APIs that [RESTful](https://apis.io/providers/restful/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include HTTP, RFC, and Standards.

The IETF standard defining HTTP semantics: methods, status codes, header fields, content negotiation, authentication, and request/response message formats. The authoritative reference for RESTful HTTP API design.

## Machine-readable artifacts (1)

- **Standards** — https://datatracker.ietf.org/doc/html/rfc9110

## Other RESTful APIs (4)

- [Richardson Maturity Model](https://apis.io/apis/restful/richardson-maturity-model/)
- [JSON:API](https://apis.io/apis/restful/json-api/)
- [HAL - Hypertext Application Language](https://apis.io/apis/restful/hal-specification/)
- [OpenAPI Specification](https://apis.io/apis/restful/openapi-specification/)

## Tags

HTTP, RFC, Standards

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/restful/http-rfc-9110/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/restful/.