All projects.

The OpenA2A security stack spans three GitHub organizations. Products to install, specifications to implement, and upstream projects where security fixes flow back to maintainers.

8products13standards13upstream forks

Standards

Open specifications for AI agent identity, trust, threat modeling, and conformance.

opena2a-parity moved here per the standards launch plan but is functionally an internal CLI parity harness. Possible move back to opena2a-org as a tool in a follow-up.

github.com/opena2a-standards

Agent Identity Protocol (AIP)

Open standard for AI agent identity, capabilities, and trust.

Agent Trust Protocol (ATP)

Open standard for verifiable trust assertions about AI agents.

Agent Trust eXtension (ATX)

Agent Trust eXtension credential format. v1.1 signs capabilities, scan summary, issuer chain, and publisher over a canonical JCS (RFC 8785) projection.

did:opena2a

W3C-style DID method for registry-resolved identifiers across registries, authorities, publishers, agents, MCP servers, AI tools, LLMs, and skills. Apache-2.0.

Agent Authorization Protocol (AAP)

Resolves 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).

Agent Threat Matrix

Tactics and techniques for attacks on AI agent systems. 61 techniques across 9 tactics, mapped to MITRE, ATLAS, and OWASP.

Agent Behavioral Governance Specification (ABGS)

Agent Behavioral Governance Specification. What goes in a SOUL.md file.

AI Injection and Infrastructure Signature Standard (AIIS)

AI Injection Signature Standard. YARA-style signatures for AI agent prompt injections in web content.

Open Agent Security Benchmark (OASB)

Open Agent Security Benchmark. 222 attack scenarios mapped to MITRE ATLAS, with a product-agnostic adapter interface.

OTel SemConv for agent identity

OpenTelemetry semantic conventions for AI agent authorization observability.

ATX Conformance

Reference verifiers and fixtures for ATX v1.0 and v1.1 (Agent Trust Credential).

A2A-IDF Conformance

Canonical conformance suite for A2A-IDF (Agent-to-Agent Identity Framework, a2aproject/A2A#1496).

A2A-IDF SDK

TypeScript SDK for A2A-IDF. RFC 9421 and Ed25519 wire signatures, attestation envelopes, delegation chains. Paired with the A2A-IDF conformance suite.