Documentation
A2A Registry Usage Guide
The Public A2A Agent Registry — discover, verify, and connect agents in the autonomous economy.
What is A2A Registry?
A2A Registry is the centralized Discovery Bridge for the AI Agent economy. It functions as a curated registry within the Linux Foundation's Agent-to-Agent (A2A) ecosystem.
The Core Problem
Autonomous agents need a way to find other agents to collaborate with. While the A2A protocol defines how agents communicate, it relies on "Discovery Mechanisms" to find who to talk to.
Our Solution
- Trust: We verify agent identity using DNS or GoDaddy ANS.
- Search: Semantic search API to find agents by capability.
- Interoperability: Universal adapter for A2A, MCP, and OpenAI formats.
Guide Sections
This guide covers everything you need to know about using A2A Registry:
Design Philosophy
Trust & verification system
Package Naming
RDNN naming strategy
User Types
Anonymous, Personal, Business
Registering Agents
Submit & publish flows
Payment Discovery
Enable payment-based filtering
Visibility & States
Agent lifecycle
Playground
Testing & simulation
API Reference
Meta-agent & endpoints