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Agent Registry & Discovery(ARD)
The discovery layer that lets agents and tool servers find each other at runtime instead of through hard-coded configuration. Three converging mechanisms make this work: A2A Agent Cards, a self-describing JSON manifest served at /.well-known/agent-card.json (RFC 8615) advertising an agent's skills, endpoints, auth schemes, and streaming capabilities; the official MCP Registry (preview September 2025), a federated public catalog and API for publishing and finding MCP servers that is extensible with private enterprise sub-registries; and decentralized naming proposals such as MIT Project NANDA, whose NANDA Index resolves cryptographically verifiable AgentFacts records to endpoints, positioned as DNS for agents. The common pattern is publish a signed capability record, then resolve it by well-known URI or registry query, validate the advertised auth schemes, and bind the agent dynamically. Distinct from `a2a-protocol`: that covers the message transport once a peer is known, while this covers finding and vetting the peer in the first place.
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Agent Registry & Discovery(ARD)
The discovery layer that lets agents and tool servers find each other at runtime instead of through hard-coded configuration. Three converging mechanisms make this work: A2A Agent Cards, a self-describing JSON manifest served at /.well-known/agent-card.json (RFC 8615) advertising an agent's skills, endpoints, auth schemes, and streaming capabilities; the official MCP Registry (preview September 2025), a federated public catalog and API for publishing and finding MCP servers that is extensible with private enterprise sub-registries; and decentralized naming proposals such as MIT Project NANDA, whose NANDA Index resolves cryptographically verifiable AgentFacts records to endpoints, positioned as DNS for agents. The common pattern is publish a signed capability record, then resolve it by well-known URI or registry query, validate the advertised auth schemes, and bind the agent dynamically. Distinct from `a2a-protocol`: that covers the message transport once a peer is known, while this covers finding and vetting the peer in the first place.
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