There is no "GetAgentCard" rpc interface in the A2AService service, in the a2a.proto spec file.

[MaoJianwei]

In the python SDK, there is an API implementing "GetAgentCard" interface.

a2a-python/src/a2a/grpc/a2a_pb2_grpc.py

Line 68 in 174d58d

self.GetAgentCard = channel.unary_unary(

But in the a2a spec file a2a.proto, there is no rpc interface named "GetAgentCard" in the A2AService service.

https://github.com/a2aproject/A2A/blob/1bd263f5373fdc8fa7c17ec8bdb24088996b6828/specification/grpc/a2a.proto#L19

So it means a2a.proto is wrong, or python SDK is out of range?

[MaoJianwei]

That appears to be a breaking change to the API functionality? From GetAgentCard to GetExtendedAgentCard.

a2aproject/A2A@b078419#diff-ba87905516581dcbdc4f5fbfcd23c990d00f973c9c2b70194de0dccfbd51b18dL103

[lkawka]

Hi Mao,

You're right, the spec changed the name of the method and the SDK is behind. We will eventually switch to the new method name.

[ishymko]

As commented on the spec repo a2aproject/A2A#1275 (comment) this was a 0.3 -> 1.0 change.

1.0 spec support was released recently with 1.0.0 SDK version.