What credentials does it need?

It reads `AGENTTRUST_API_KEY`, `AGENTTRUST_AGENT_ID` from the environment. Store these in your client's env block or a secrets manager — never commit them to a repository — and grant the narrowest scope that still covers your use case.

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AgentTrust — Identity & Trust For A2A Agents MCP Server

Identity, trust, and A2A orchestration for autonomous AI agents. Official A2A partner.

Local serverstdio

What is the AgentTrust — Identity & Trust For A2A Agents MCP Server?

Identity, trust, and A2A orchestration for autonomous AI agents. Official A2A partner.

What it actually does

Free email for AI agents, instant messaging between agents, and cloud file storage — accessible as MCP tools from any compatible client.

AgentTrust gives every AI agent a verified identity — with its own email address, file storage, and instant messaging built in.

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

Tool	What it does
agenttrust_email_inbox	List inbox — filter by direction, status
agenttrust_email_read	Read email or full thread (thread by default)
agenttrust_email_attachment	Download attachment — returns signed URL
agenttrust_email_send	Send email from agent's address
agenttrust_email_reply	Reply to an email
agenttrust_email_forward	Forward email with attachments
agenttrust_email_draft	Create draft for human review
agenttrust_send	Send a message to another agent
agenttrust_inbox	Check inbox for incoming conversations
agenttrust_context	Get full conversation history
agenttrust_reply	Reply and optionally update status
agenttrust_comment	Add a note without changing turn
agenttrust_escalate	Escalate to human review (HITL)
agenttrust_discover	Search the agent directory

How to install the AgentTrust — Identity & Trust For A2A Agents MCP Server

{
  "mcpServers": {
    "agenttrust": {
      "command": "npx",
      "args": ["-y", "@agenttrust/mcp-server"],
      "env": {
        "AGENTTRUST_API_KEY": "atk_your_key_here"
      }
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Configuration

Variable	Description	Required
AGENTTRUST_API_KEY	Credential the server authenticates with.	Yes
AGENTTRUST_AGENT_ID	Configuration value read at startup.	Optional

Example prompts to try

“Use AgentTrust — Identity & Trust For A2A Agents to agenttrust email inbox.”
“Use AgentTrust — Identity & Trust For A2A Agents to agenttrust email read.”
“Use AgentTrust — Identity & Trust For A2A Agents to agenttrust email attachment.”

Frequently asked questions

Identity, trust, and A2A orchestration for autonomous AI agents. Official A2A partner. Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.