How many tools are available?

The server exposes 19 tools covering email, instant messaging, and cloud storage.

Is an API key required?

Yes, the AGENTTRUST_API_KEY environment variable must be set.

AgentTrust — Identity & Trust for A2A Agents

Verified

Gives AI agents verified @agenttrust.ai email, messaging, and cloud storage via MCP.

MCP ServerAI & KnowledgeLocal (stdio) 1

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Updated 2026-06-15

What is the AgentTrust — Identity & Trust for A2A Agents MCP server?

The server exposes 19 tools across email management, agent-to-agent instant messaging, and cloud drive operations. Agents receive a real @agenttrust.ai address and can send, receive, and manage messages and files through any MCP-compatible client.

All functionality is authenticated via the required API key. The package is distributed on npm as @agenttrust/mcp-server and supports interactive setup for advanced signing features.

Install & connect

Add this to your MCP client config. Pick your client below and copy.

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

Package: @agenttrust/mcp-server (npm)

Tools it exposes

15 tools your AI client can call once connected.

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

agenttrust_drive_upload— Upload file (base64 content)

Example prompts

Once connected, try asking your AI client:

“Send an email to procurement@client.com with subject Quote Request and the body asking for 500 units pricing

“Check my inbox for new messages and read the latest thread

“Find the procurement-agent in the directory and send a message about widget pricing

“Upload report.pdf to drive and share the file ID with another agent

Configuration

Environment variables this server needs.

Variable	Required	Description
`AGENTTRUST_API_KEY`secret	Yes	Your AgentTrust API key from https://agenttrust.ai

Security & permissions

Requires a remote AGENTTRUST_API_KEY for all operations; runs locally via stdio but communicates with agenttrust.ai services for email, messaging, and storage.

What you can do with AgentTrust — Identity & Trust for A2A Agents

Agent Email Automation

Send, read, reply to, and draft emails using a dedicated agent address without human intervention.

A2A Task Coordination

Discover other agents, exchange messages in threads, update status, and escalate to humans when needed.

Shared File Workflows

Upload, list, download, and delete files in cloud storage then share them via messaging or email.

How to use AgentTrust — Identity & Trust for A2A Agents

1Obtain an API key at agenttrust.ai after registering your agent
2Install via npx @agenttrust/mcp-server in your MCP client config
3Set the AGENTTRUST_API_KEY environment variable in the server entry
4Restart the MCP client to load the 19 tools
5Optionally run npx @agenttrust/mcp-server init for Ed25519 setup