Agent Authorization Grant (AAuth) vs OAuth Profile for Delegated AI Agent Authorization (DAAP)
The map lists them as complementary: sites and agents commonly implement both.
| Agent Authorization Grant AAuth | OAuth Profile for Delegated AI Agent Authorization DAAP | |
|---|---|---|
| Lifecycle step | 3 Permit: What may the agent do here? | 3 Permit: What may the agent do here? |
| Answers | How can a conversational AI agent, reached over a channel without browser redirect (phone, SMS), obtain a properly scoped OAuth access token without impersonating the user? | How can a human user delegate constrained, attenuable, revocable authority to an AI agent using standard OAuth mechanisms, with no new endpoints or claims required? |
| Governed by | IETF individual Internet-Draft (OAuth-adjacent, not yet adopted by the OAuth Working Group as of this verification) | IETF individual Internet-Draft (OAuth-adjacent; not yet adopted by the OAuth Working Group as of this verification) |
| Status (issuer's words) | Expired Internet-Draft (expired 2026-04-23) | Internet-Draft, individual submission, Active |
| Version | draft-rosenberg-oauth-aauth-01 (2026-04-22) | draft-mishra-oauth-agent-grants-02 (2026-08-30) |
| Form / transport | endpoint | endpoint |
| Found at | OAuth 2.1 extension grant flow; no well-known file defined | /.well-known/oauth-authorization-server |
| Implementation | none found | prototype |
| Evidence | 5 verified | 2 verified, 1 reported |
| Primary use case | Delegate a user's authority to an agent | Delegate a user's authority to an agent |
| Last verified | 2026-10-23 (current) | 2026-10-23 (current) |
| Specification | https://datatracker.ietf.org/doc/html/draft-rosenberg-oauth-aauth | https://datatracker.ietf.org/doc/html/draft-mishra-oauth-agent-grants-02 |
When to use which
- Choose Agent Authorization Grant when your question is “How can a conversational AI agent, reached over a channel without browser redirect (phone, SMS), obtain a properly scoped OAuth access token without impersonating the user?” and you accept its maturity: status "Expired Internet-Draft (expired 2026-04-23)", implementation none found. It is no longer maintained; prefer its successor.
- Choose OAuth Profile for Delegated AI Agent Authorization when your question is “How can a human user delegate constrained, attenuable, revocable authority to an AI agent using standard OAuth mechanisms, with no new endpoints or claims required?” and you accept its maturity: status "Internet-Draft, individual submission, Active", implementation prototype.
Read the full articles
- Agent Authorization Grant: How can a conversational AI agent, reached over a channel without browser redirect (phone, SMS), obtain a properly scoped OAuth access token without impersonating the user?
- OAuth Profile for Delegated AI Agent Authorization: How can a human user delegate constrained, attenuable, revocable authority to an AI agent using standard OAuth mechanisms, with no new endpoints or claims required?