how to select http (seems forces rpc?)

[marcinkubica]

testing against kagent.dev

❯ curl http://localhost:8083/api/a2a/kagent/golas/.well-known/agent.json
{"name":"golas","description":"agent with no system prompt and no tools","url":"http://127.0.0.1:8083/api/a2a/kagent/golas/","version":"","capabilities":{"streaming":true,"pushNotifications":false,"stateTransitionHistory":true},"defaultInputModes":["text"],"defaultOutputModes":["text"],"skills":[]}

❯ a2a-cli --debug --server http://localhost:8083/api/a2a/kagent/golas/.well-known/agent.json
2025-09-07 16:44:20,737 - ERROR - Error connecting to server: Server error '500 Internal Server Error' for url 'http://localhost:8083/api/a2a/kagent/golas/.well-known/agent.json/rpc'
For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/500
Failed to initialize chat context.

[sammccauley117]

+1 even using the official a2a-js sample doesn't work https://github.com/a2aproject/a2a-js/tree/main/src/samples/agents/movie-agent