Open standards.
The protocols and specifications behind OpenA2A. Identity, trust, authorization, threat modeling, and conformance for AI agents. Each is published openly under the vendor-neutral opena2a-standards organization and implemented by the OpenA2A tools.
Identity and trust
Agent Identity Protocol (AIP)
DraftOpen standard for AI agent identity, capabilities, and trust.
Agent Trust Protocol (ATP)
DraftOpen standard for verifiable trust assertions about AI agents.
ATX
Draft, v1.1Agent Trust eXtension credential format. v1.1 signs capabilities, scan summary, issuer chain, and publisher over a canonical JCS (RFC 8785) projection.
did:opena2a
W3C registration filedW3C-style DID method for registry-resolved identifiers across registries, authorities, publishers, agents, MCP servers, AI tools, LLMs, and skills. Apache-2.0.
Authorization
Agent Authorization Protocol (AAP)
DraftResolves an agent's ATX trust into scoped resource access through a grant reference, with no credential value entering the agent context. Defines the decision and enforcement split and the Credential Provider Interface (Retrieve, Assume, Exchange).
Threat modeling and governance
Agent Threat Matrix
PublishedTactics and techniques for attacks on AI agent systems. 57 techniques across 9 tactics, mapped to MITRE, ATLAS, and OWASP.
AIIS Signatures
DraftAI Injection Signature Standard. YARA-style signatures for AI agent prompt injections in web content.
Benchmark and observability
OASB
PublishedOpen Agent Security Benchmark. 222 attack scenarios mapped to MITRE ATLAS, with a product-agnostic adapter interface.
OTel SemConv for agent identity
DraftOpenTelemetry semantic conventions for AI agent authorization observability.
Conformance and SDKs
ATX Conformance
Conformance suiteReference verifiers and fixtures for ATX v1.0 and v1.1 (Agent Trust Credential).
A2A-IDF Conformance
Conformance suiteCanonical conformance suite for A2A-IDF (Agent-to-Agent Identity Framework, a2aproject/A2A#1496).
A2A-IDF SDK
SDKTypeScript SDK for A2A-IDF. RFC 9421 and Ed25519 wire signatures, attestation envelopes, delegation chains. Paired with the A2A-IDF conformance suite.