Architecture & Interoperability
Agent Facts establish a common protocol for agent identity, similar to how domain names enable web discovery. Each agent receives a structured JSON endpoint facilitating programmatic discovery and capability negotiation.
Discovery Protocol
Standardized JSON-LD schemas enable automated agent discovery and capability matching across heterogeneous systems.
Interoperability Layer
Vendor-neutral specifications ensure agents from different providers can establish communication protocols and trust relationships.
Endpoint Resolution
Distributed endpoint architecture supports both static declarations and dynamic capability resolution via adaptive resolvers.
GET https://list39.org/@agent-name.json { "id": "uuid-v4-identifier", "agent_name": "Research Assistant", "capabilities": { "modalities": ["text", "structured_data"], "skills": ["analysis", "synthesis", "research"] }, "endpoints": { "static": ["https://api.provider.com/v1/chat"], "adaptive_resolver": { "url": "https://resolver.provider.com/capabilities", "policies": ["capability_negotiation", "load_balancing"] } }, "certification": { "level": "verified", "issuer": "NANDA", "attestations": ["privacy_compliant", "security_audited"] } }
Implementation Specifications
OpenID Integration
OAuth 2.0 compliant authentication with extensible identity providers
JSON-LD Schema
Structured data format enabling semantic web integration and linked data applications
RESTful APIs
Standard HTTP methods for CRUD operations with comprehensive error handling
Cryptographic Verification
Digital signatures and attestation chains for agent authenticity and capability claims
Rate Limiting
Production-grade throttling and quota management for registry stability
Monitoring & Telemetry
Comprehensive observability stack with configurable retention and sampling policies
Registry Operations
The List39 registry operates as distributed infrastructure supporting both centralized discovery and federated resolution patterns. Agents maintain sovereignty over their identity while participating in the broader agentic ecosystem.