[Feat]: a "no SSL" configuration

[blookot]

Is your feature request related to a problem? Please describe.

I'm querying a A2A endpoint with http:// (no SSL, as it's a non prod deployment), but it seems it is not supported, or did I miss it?

Right now, the UI displays:

Error: An internal server error occurred: HTTP Error 503: Network communication error fetching agent card from https://localhost:5601/api/agent_builder/a2a/docs-agent.json: [SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1028)

I'm getting this log:

[BACKEND] 2025-11-26 14:54:30,463 - app - ERROR - An internal server error occurred
[BACKEND] Traceback (most recent call last):
[BACKEND]   File "/Users/vincent/installs/agent-builder-demo/a2a-inspector/.venv/lib/python3.13/site-packages/httpx/_transports/default.py", line 101, in map_httpcore_exceptions
[BACKEND]     yield
[BACKEND]   File "/Users/vincent/installs/agent-builder-demo/a2a-inspector/.venv/lib/python3.13/site-packages/httpx/_transports/default.py", line 394, in handle_async_request
[BACKEND]     resp = await self._pool.handle_async_request(req)
[BACKEND]            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[BACKEND]   File "/Users/vincent/installs/agent-builder-demo/a2a-inspector/.venv/lib/python3.13/site-packages/httpcore/_async/connection_pool.py", line 256, in handle_async_request
[BACKEND]     raise exc from None
[BACKEND]   File "/Users/vincent/installs/agent-builder-demo/a2a-inspector/.venv/lib/python3.13/site-packages/httpcore/_async/connection_pool.py", line 236, in handle_async_request
[BACKEND]     response = await connection.handle_async_request(
[BACKEND]                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[BACKEND]         pool_request.request
[BACKEND]         ^^^^^^^^^^^^^^^^^^^^
[BACKEND]     )
[BACKEND]     ^
[BACKEND]   File "/Users/vincent/installs/agent-builder-demo/a2a-inspector/.venv/lib/python3.13/site-packages/httpcore/_async/connection.py", line 101, in handle_async_request
[BACKEND]     raise exc
[BACKEND]   File "/Users/vincent/installs/agent-builder-demo/a2a-inspector/.venv/lib/python3.13/site-packages/httpcore/_async/connection.py", line 78, in handle_async_request
[BACKEND]     stream = await self._connect(request)
[BACKEND]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[BACKEND]   File "/Users/vincent/installs/agent-builder-demo/a2a-inspector/.venv/lib/python3.13/site-packages/httpcore/_async/connection.py", line 156, in _connect
[BACKEND]     stream = await stream.start_tls(**kwargs)
[BACKEND]              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[BACKEND]   File "/Users/vincent/installs/agent-builder-demo/a2a-inspector/.venv/lib/python3.13/site-packages/httpcore/_backends/anyio.py", line 67, in start_tls
[BACKEND]     with map_exceptions(exc_map):
[BACKEND]          ~~~~~~~~~~~~~~^^^^^^^^^
[BACKEND]   File "/Library/Frameworks/Python.framework/Versions/3.13/lib/python3.13/contextlib.py", line 162, in __exit__
[BACKEND]     self.gen.throw(value)
[BACKEND]     ~~~~~~~~~~~~~~^^^^^^^
[BACKEND]   File "/Users/vincent/installs/agent-builder-demo/a2a-inspector/.venv/lib/python3.13/site-packages/httpcore/_exceptions.py", line 14, in map_exceptions
[BACKEND]     raise to_exc(exc) from exc
[BACKEND] httpcore.ConnectError: [SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1028)

Describe the solution you'd like

Have a config flag to enable https

Describe alternatives you've considered

No response

Additional context

No response

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