Interoperability

The NANDA index is a quilt of various agent, resource, and tool registries across platforms, organizations, and protocols.

Quilt of Registries

The NANDA index can point to native entries or external registries/directories. This quilt-like architecture enables:

  • Direct registration: Agents registered natively via the NANDA index
  • Enterprise deployments: Enterprises deploy MCP, A2A, or NANDA registries internally with split-horizon resolution (internal queries stay internal, external queries cascade)
  • Public directories: Integration with MCP, A2A, and other agent directories
  • Enterprise directory connectors: Enterprise-focused directories like AGNTCY can connect to the global NANDA index via adapters, enabling enterprise agents to participate in the wider ecosystem
  • Web3 registries: DID-based agents in decentralized marketplaces

Split-Horizon Resolution

Just like split-horizon DNS, enterprises can deploy registry systems (MCP, A2A, or NANDA) within their internal environment. Resolution queries first check the internal registry; if an agent is not found internally, the query cascades to external public registries. This enables:

  • • Internal agent discovery: Fast, secure discovery within enterprise boundaries
  • • Controlled external access: Selective access to public agents when needed
  • • Audit logging: All external queries are logged for security and compliance
  • • Policy enforcement: Enterprise policies govern which external agents are accessible

Registry Interoperability

NANDA Index

Central indirection layer

Enterprise Deployments

Internal MCP, A2A, or NANDA registries with split-horizon resolution

Public Directories

MCP, A2A

Related Standards & Protocols

Model Context Protocol (MCP)

Anthropic's protocol for AI agent communication

Agent-to-Agent (A2A)

Google's enterprise-ready standard for inter-agent communication

AGNTCY Directory

Enterprise-focused agent directory service with connector to the global NANDA index

How AgenticDNS Complements Existing Directories

AgenticDNS does not replace existing directories. Instead, it provides:

  • • Global indirection: Unified namespace across all registries
  • • Verifiable metadata: W3C VC-signed AgentFacts for trust
  • • Policy-driven local resolution: Enterprise control over routing decisions
  • • Privacy-preserving discovery: PrivateFactsURL for anonymous access