OAuth 2.1 Draft
Consolidated OAuth.
More in Agent Protocols & Standards
Agent2Agent (A2A) Protocol
Open protocol for agent-to-agent communication.
Agent Communication Protocol (ACP)
Open protocol for agent interoperability from IBM's BeeAI.
AGNTCY
Open infrastructure for the internet of agents.
llms.txt
Proposal for a /llms.txt file helping LLMs use websites.
| Category | Agent Protocols & Standards |
|---|---|
| Authentication | No auth |
| Pricing | Free |
| Website | https://oauth.net/2.1/ |
| Docs | https://datatracker.ietf.org/doc/draft-ietf-oauth-v2-1/ |
| Last checked | 2026-10-14 |
| As JSON | /api/v1/directory/oauth-21-draft.json |