From dee879ec2efebd035ef206c9520172fe0f4edf3b Mon Sep 17 00:00:00 2001
From: Ishaan Jaffer <ishaanjaffer0324@gmail.com>
Date: Wed, 28 Jan 2026 10:54:14 -0800
Subject: [PATCH] feat: .well-known/agent.json

---
 litellm/proxy/agent_endpoints/a2a_endpoints.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/litellm/proxy/agent_endpoints/a2a_endpoints.py b/litellm/proxy/agent_endpoints/a2a_endpoints.py
index a21f3291d31..24727aacd75 100644
--- a/litellm/proxy/agent_endpoints/a2a_endpoints.py
+++ b/litellm/proxy/agent_endpoints/a2a_endpoints.py
@@ -119,6 +119,11 @@ async def _handle_stream_message(
     tags=["[beta] A2A Agents"],
     dependencies=[Depends(user_api_key_auth)],
 )
+@router.get(
+    "/a2a/{agent_id}/.well-known/agent.json",
+    tags=["[beta] A2A Agents"],
+    dependencies=[Depends(user_api_key_auth)],
+)
 async def get_agent_card(
     agent_id: str,
     request: Request,
@@ -127,6 +132,10 @@ async def get_agent_card(
     """
     Get the agent card for an agent (A2A discovery endpoint).
 
+    Supports both standard paths:
+    - /.well-known/agent-card.json
+    - /.well-known/agent.json
+
     The URL in the agent card is rewritten to point to the LiteLLM proxy,
     so all subsequent A2A calls go through LiteLLM for logging and cost tracking.
     """