Pega Infinity 25.1.3 and Infinity 26.1 A2A Connect Agent fails with "Service URL was not provided" when calling external Google ADK Agent

AI
1

Hi,

I’m trying to connect a Pega Infinity 26.1 AI Agent to an external Google ADK A2A Agent using a Connect Agent (Protocol = Agent2Agent).

The external agent works correctly when tested with Hoppscotch:

  • Agent Card that is provided to the Connect Agent, is accessible
  • JSON-RPC endpoint works (tested with Hoppscotch)
  • No authentication required

However, from Pega, the call fails immediately with: ConnectorException: Service URL was not provided

Cloud Run logs confirm that Pega reaches the external service with a successful GET / health check, but it never sends the required JSON-RPC POST / A2A request. This suggests that Pega fails to resolve or use the execution URL from the Agent Card before the actual agent invocation.

Has anyone successfully connected a Pega Infinity 25.1.3 or Pega Infinity 26.1 AI Agent to a non-Pega external A2A agent? Is there any additional configuration required ?

Thanks!

2

i resolved the problem. the agent card link had to end with : /.well-known/agent-card.json