来源: a2a-registry/browse Agent Card: https://backflowtesters.fyi/.well-known/agent-card.json A2A: https://backflowtesters.fyi/a2a Find a backflow tester for your property. Ask a question in plain text and get the matching backflow testers, each with its page URL. For tool access, use the MCP server at https://backflowtesters.fyi/mcp.