A2a MCP Server

A2A TrustGate: 4-gate firewall that screens every AI-agent action before it runs. 49 tools.

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What is the A2a MCP server?

A2A TrustGate: 4-gate firewall that screens every AI-agent action before it runs. 49 tools. That is what the a2a mcp server brings to an AI assistant: the same capability, reachable through the Model Context Protocol rather than a separate app or dashboard.

The short version

A2A TrustGate screens every action an agent takes before it runs, and writes the decision to an immutable, SIEM-ready audit trail. Not a policy document that says agents should behave — a control that stops the ones that don't, and the evidence to prove it.

  • Evaluate — — screen any command through the 4-gate firewall, allow / block / needs-review, in milliseconds
  • Pipelines — — named screening routes with their own policy and task history
  • Workspaces — — scoped multi-agent enforcement, one agent's action screened against the tenant policy
  • Channels — — HMAC-signed agent-to-agent messaging, contract-scoped
  • Devices & sites — — per-device policy, lock, bulk CSV import, and a global killswitch (network-ops)
  • Catalogues & licences — — register IP, mint scoped licences, access-log every reach (creative / IP owners)

Getting it running

Because this one is hosted, setup is mostly authentication — you point your client at the endpoint and approve access. Nothing runs on your machine, so there is no runtime to keep patched.

What it needs from you

Configuration is passed through the environment: A2A_API_KEY, YOUR_API_KEY, YOUR_KEY. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.

How it compares

Plenty of team communication servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. It is maintained by jyswee; worth a glance at recent repository activity before you build anything load-bearing on it.

SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.

Things to watch

  • Your data travels to the provider's service, so the usual questions apply about what you send and what they retain.
  • Missing credentials fail quietly in some clients — if no tools show up, check the environment block first.
  • Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.

How to install the A2a MCP server

{
  "mcpServers": {
    "a2a-trustgate": {
      "command": "npx",
      "args": ["-y", "a2a-trustgate"],
      "env": {
        "A2A_API_KEY": "your-value",
        "YOUR_API_KEY": "your-value",
        "YOUR_KEY": "your-value"
      }
    }
  }
}

Add to claude_desktop_config.json, then restart Claude Desktop.

Configuration

VariableDescriptionRequired
A2A_API_KEYCredential the server authenticates with.Yes
YOUR_API_KEYCredential the server authenticates with.Yes
YOUR_KEYCredential the server authenticates with.Yes

Frequently asked questions

It connects A2a to MCP-compatible AI assistants such as Claude and Cursor. Instead of copying data back and forth by hand, the assistant works with A2a directly.