api-catalog: A Well-Known URI and Link Relation to Help Discovery of APIs
RFC 9727, “api-catalog: A Well-Known URI and Link Relation to Help Discovery of APIs”, is a Proposed Standard document published in June 2025 by K. Smith. The canonical text is published by the RFC Editor.
Abstract
This document defines the "api-catalog" well-known URI and link relation. It is intended to facilitate automated discovery and usage of published Application Programming Interfaces (APIs). A request to the api-catalog resource will return a document providing information about, and links to, the Publisher's APIs.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9727 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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- RFC 9729 The Concealed HTTP Authentication Scheme
- RFC 9725 WebRTC-HTTP Ingestion Protocol
- RFC 9730 Interworking of GMPLS Control and Centralized Controller Systems
- RFC 9724 State of Affairs for Randomized and Changing Media Access Control Addresses
- RFC 9731 A YANG Data Model for Virtual Network Operations
- RFC 9723 BGP Colored Prefix Routing for Services Based on Segment Routing over IPv6