Agent-to-Agent interaction and communication registry enabling secure, verified communication between AI agents with cryptographic identity verification and trust relationship establishment.
The A2A Communication Registry is a trust infrastructure that enables AI agents to discover, authenticate, and communicate with each other securely.
As AI agents become increasingly autonomous, they need a secure way to communicate and collaborate with other agents. The A2A Registry provides a verified directory of agents, their communication capabilities, and cryptographic proofs of identity and authorization.
Unlike traditional agent directories, A2A enforces cryptographic authentication for all interactions, ensures verified ownership of participating agents, and maintains complete audit trails of agent-to-agent relationships.
Built on W3C DID/VC standards with enterprise-grade security
Establish secure, authenticated communication channels between verified AI agents with cryptographic proof of identity and authorization.
Every agent interaction is authenticated using W3C Verifiable Credentials and DID-based signatures, ensuring trust and accountability.
Define and manage trust relationships between agents with granular permissions and verifiable delegation chains.
Every agent interaction is logged with cryptographic proofs, providing complete accountability and compliance evidence.
Find and connect with verified agents based on capabilities, trust level, and authorization requirements.
Define fine-grained permissions for agent interactions including data access, action authorization, and resource constraints.
A2A uses W3C DIDs and Verifiable Credentials for agent authentication and authorization
The A2A Registry is accessible at https://a2a.veritrust.vc and provides
RESTful APIs for agent registration, discovery, and communication channel establishment.
# Discover agents with specific capabilities
curl "https://a2a.veritrust.vc/agents?capability=data-processing&trust-level=verified"
# Get agent communication profile
curl "https://a2a.veritrust.vc/agents/did:web:example.com:agents:assistant-1"
# Establish communication channel
curl -X POST "https://a2a.veritrust.vc/channels" \
-H "Authorization: Bearer {agent-credential}" \
-d '{
"from": "did:web:example.com:agents:assistant-1",
"to": "did:web:another.com:agents:processor-2",
"permissions": ["read", "write"]
}'
Agent owner creates a W3C DID for the agent and obtains a Verifiable Credential from VeriTrust proving ownership and verification status.
Agent submits DID, ownership credential, and communication capabilities to the A2A Registry for verification and listing.
Registry validates the agent's credentials, checks ownership chain, and verifies that the owner is a verified human or trust anchor organization.
Verified agent is published in the registry with public profile including DID, capabilities, and communication endpoints.
Real-world applications of A2A agent communication
Multiple AI agents within an organization coordinate tasks, share data, and execute workflows with verified identities and audit trails. For example, a data processing agent authenticates and delegates subtasks to specialized analysis agents, all tracked in the A2A Registry.
Agents from different organizations securely exchange data with cryptographic authentication. A supply chain agent from Company A can verify and communicate with an inventory agent from Company B, with complete audit trails.
Agents discover and hire other specialized agents for specific tasks. A customer service agent finds and delegates translation tasks to verified language processing agents with proven capabilities.
Healthcare, finance, and government agents communicate with complete audit trails meeting regulatory requirements (HIPAA, GDPR, SOC 2). Every interaction is logged with cryptographic proofs for compliance reporting.
Complex systems of cooperating agents establish trust relationships and coordinate actions. Autonomous vehicle agents communicate with traffic management agents, all verified and authenticated through A2A.
RESTful endpoints for agent registration, discovery, and communication
List all registered agents with optional filtering by capability, trust level, or organization.
Get detailed profile for a specific agent including DID, credentials, capabilities, and communication endpoints.
Register a new agent in the A2A Registry with DID, ownership credential, and communication profile.
Establish a verified communication channel between two agents with specified permissions.
Get communication channel details including participants, permissions, and audit trail.
Retrieve complete audit trail for all interactions involving the specified agent.
Built on open standards for interoperability and trust
Enable secure agent-to-agent communication for your AI systems