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Evolution of AI Agent Registry Solutions: Centralized, Enterprise, and Distributed Approaches

Created by
  • Haebom

Author

Aditi Singh, Abul Ehtesham, Mahesh Lambe, Jared James Grogan, Abhishek Singh, Saket Kumar, Luca Muscariello, Vijoy Pandey, Guillaume Sauvage De Saint Marc, Pradyumna Chari, Ramesh Raskar

Outline

Given the growing demand for a registry infrastructure for trusted discovery, feature negotiation, and identity assurance of autonomous AI agents, we analyze five leading approaches: (1) MCP Registry (centralized mcp.json descriptor publishing), (2) A2A Agent Cards (decentralized self-describing JSON feature manifests), (3) AGNTCY Agent Directory Service (IPFS Kademlia DHT content routing extension for semantic taxonomy-based content discovery, OCI artifact storage, and Sigstore-based integrity), (4) Microsoft Entra Agent ID (enterprise SaaS directory with policy and zero-trust integration), and (5) NANDA Index AgentFacts (cryptographically verifiable and privacy-preserving attestation model). We present architectural tradeoffs between centralized control, enterprise governance, and decentralized resilience using four evaluation dimensions: security, authentication, scalability, and maintainability. We conclude with design recommendations for a new Internet of AI Agents that require verifiable identity, adaptive search flows, and interoperable functional semantics.

Takeaways, Limitations

Takeaways:
Analyze the tradeoffs between security, authentication, scalability, and maintainability across centralized, enterprise, and distributed architectures.
Presenting design recommendations for a new Internet of AI Agents.
Emphasizes the importance of verifiable identity, adaptive search flows, and interoperable functional semantics.
Limitations:
Analysis limited to five specific approaches.
Possible lack of specific implementation details and performance comparisons.
Predictability and adaptability to future technological changes may be limited.
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