A2A MCP Server — Agent-to-Agent Protocol Bridge
A2A MCP server bridging Google's Agent-to-Agent (A2A) protocol with MCP — enabling MCP-based agents to communicate with agents built on the A2A protocol, supporting cross-framework agent-to-agent communication and integrating Google's A2A ecosystem with Anthropic's MCP ecosystem.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
HTTPS. Multi-agent surface. Community bridge. Secure all agent endpoints.
⚡ Reliability
Best When
A team builds multi-agent systems spanning both MCP and A2A ecosystems — particularly when integrating Google's agent framework with Claude/MCP-based agents.
Avoid When
Your agents are all MCP-based or don't need A2A interoperability.
Use Cases
- • Connecting MCP agents with Google A2A-compatible agents from orchestration agents
- • Building cross-framework multi-agent systems from enterprise agents
- • Bridging Claude agents with agents from other frameworks supporting A2A
- • Enterprise multi-agent orchestration across different AI frameworks
- • Testing A2A protocol implementations from development agents
- • Interoperability between agent platforms from integration agents
Not For
- • Teams using only MCP-based agents (no A2A components)
- • Simple single-agent workflows
- • Teams unfamiliar with A2A protocol specification
Interface
Authentication
Authentication depends on the A2A agent endpoints being bridged. Configurable per-agent authentication tokens.
Pricing
Community MCP bridge is free. A2A agent infrastructure costs depend on deployment.
Agent Metadata
Known Gotchas
- ⚠ A2A protocol is relatively new (2025) — ecosystem still maturing
- ⚠ Requires understanding both MCP and A2A protocol specifications
- ⚠ Community bridge — not officially endorsed by Google or Anthropic
- ⚠ A2A protocol changes may break bridge without notice
- ⚠ Both A2A and MCP agents must be running for bridge to function
- ⚠ Cross-framework debugging is complex — errors may originate in either system
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for A2A MCP Server — Agent-to-Agent Protocol Bridge.
Scores are editorial opinions as of 2026-03-06.