AgentMesh A2A Gateway
JSON-RPC A2A endpoint at https://app.agentmesh.link/a2a, advertised by the agent card served at /.well-known/agent-card.json (protocolVersion 1.0, JSONRPC binding, four skills). The provider documents and ships examples for one authenticated method, SendMessage (X-Agent-Key header, receiver_uid in message metadata), and states plainly that full A2A conformance is not claimed; live probes confirm message/send, SendStreamingMessage, CancelTask and GetAgentCard return "Method not implemented" while GetTask/tasks/get are routed.