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A2A

ProtocolSpecification Published specification

Agent2Agent (A2A) is an open standard for communication and interoperability between independent AI agent systems: discovery, interaction and task management.

Protocol profile

Connects
Agent ↔ agent
Maturity
Open protocol / implementation
Distinction
Discover other agents, delegate tasks, exchange work.
Specification
Primary source ↗

Documented relationships · 9

← Runtime support Amazon Bedrock AgentCoreDocumented live integration Documented implementation

AgentCore runtime supports A2A protocol. · Current

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← Supports protocol Gemini Enterprise Agent PlatformDocumented live integration Documented implementation

Google describes creation and deployment of A2A agents; feature maturities differ. · Mix of GA / preview

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← Secures protocol Google Agent GatewayDocumented live integration Documented implementation

Google Gateway mediates A2A protocol and policies. · Current

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← Agent registration Google Agent RegistryDocumented live integration Documented implementation

Google allows registry-based A2A agent publication and discovery. · Current

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← Invokes external agent Microsoft Copilot StudioDocumented live integration Documented integration

Microsoft documents adding external A2A agents as collaborators. · Available in supported standard-harness agents

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← A2A connector (MuleSoft) Salesforce AgentforceDocumented live integration Documented integration

Salesforce documents A2A support through MuleSoft agent orchestration.

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← A2A support ServiceNow AI AgentsDocumented live integration Documented implementation

ServiceNow documents A2A support (GA Jun 2026).

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← Publishes agent endpoint Microsoft Copilot Studio MCP/A2A publishDemonstrated / pilot Documented preview

Published Copilot Studio agents can expose A2A endpoint in early release. · Preview

Evidence ↗
← Transport option UCP — Universal Commerce ProtocolSpecification

UCP supports agent-to-agent integration patterns. · Current

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Provided by

Linux FoundationCompanyVendor documented