[Bug]: Can't find agent card with endpoint /.well-known/agent.json

[cuizhanming]

What happened?

ADK A2A server by default expose agent card at /.well-known/agent.json endpoint.

The inspector keeps looking for /.well-known/agent-card.json.

At least support overriding of acceptable endpoint.

Relevant log output

Error: An internal server error occurred: HTTP Error 404: Failed to fetch agent card from https://planner-agent-550681616.us-central1.run.app/.well-known/agent-card.json: Client error '404 Not Found' for url 'https://planner-agent-550681616.us-central1.run.app/.well-known/agent-card.json' For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/404

Code of Conduct

• I agree to follow this project's Code of Conduct

[dwmkerr]

Also curious about this, it actually seems there's some ambiguity across projects as to whether it is agent-card.json or agent.json:

• https://github.com/trpc-group/trpc-a2a-go/blob/9fed424690a62a68bd6342cd931b27e8331f6218/server/options.go#L24

a2a protocol 0.3 uses agent-card.json, < 0.3 uses agent.json - loads of popular libraries still hard coded to agent.json

https://github.com/a2aproject/A2A/releases/tag/v0.3.0

Our project we're fixing to use both, agent-card followed by agent

mckinsey/agents-at-scale-ark#246