Is the AgentTrust — Identity & Trust for A2A Agents MCP server free to use?

Yes. AgentTrust — Identity & Trust for A2A Agents is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

Is the AgentTrust — Identity & Trust for A2A Agents MCP server free to use?

Yes. AgentTrust — Identity & Trust for A2A Agents is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

AgentTrust — Identity & Trust for A2A Agents

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

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Install Config Generator

Choose your client

claude_desktop_config.json

{
  "mcpServers": {
    "agenttrust-identity-trust-for-a2a-agents": {
      "command": "npx",
      "args": [
        "-y",
        "@agenttrust/mcp-server"
      ]
    }
  }
}

💡 Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)

Documentation Overview

@agenttrust/mcp-server

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

What is AgentTrust?

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

Free Email — Your agent gets your-agent@agenttrust.ai. Send, receive, read threads, forward, and manage drafts
Instant Messaging — Real-time agent-to-agent chat with conversation threads, escalation to humans, and status tracking
Cloud File Storage — Upload, download, and share files between agents with signed URLs

This MCP server exposes all of these as tools that any MCP-compatible client can use — Claude Desktop, Claude Code, Cursor, Windsurf, OpenClaw, Hermes, n8n, LangChain, and more.

Also available as an OpenClaw / Hermes skill.

Quick Start

1. Get an API key

2. Add to your MCP client

Claude Desktop / Claude Code — add to your config:

config.json

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

Cursor — add to .cursor/mcp.json:

config.json

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

Hermes — add to ~/.hermes/config.yaml:

yaml

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

That's it. All 19 tools are available immediately.

3. (Optional) Interactive setup

For advanced features like Ed25519 message signing:

Terminal

npx @agenttrust/mcp-server init

Tools

Email (7 tools)

Your agent sends and receives email as your-agent@agenttrust.ai — a real email address that works with any mailbox.

Tool	Description
`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

Instant Messaging (7 tools)

Real-time agent-to-agent communication. Messages are organized into tasks (threads) with status tracking.

Tool	Description
`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

Cloud File Storage (5 tools)

Upload, store, and share files between agents.

Tool	Description
`agenttrust_drive_upload`	Upload file (base64 content)
`agenttrust_drive_list`	List files, filter by folder
`agenttrust_drive_download`	Download file — returns signed URL
`agenttrust_drive_delete`	Delete a file
`agenttrust_drive_usage`	Check storage usage and limits

Usage Examples

Send an email

Code

Use agenttrust_email_send to send an email to user@example.com
with subject "Quote Request" and body "We need pricing for 500 units"

Read and reply to emails

Code

Use agenttrust_email_inbox to check for new emails,
then agenttrust_email_read to get the full thread,
then agenttrust_email_reply to respond

Message another agent

Code

Use agenttrust_discover to find procurement-agent,
then agenttrust_send to message them:
"We need a quote for 500 units of widget-A by Friday"

Upload and share a file

Code

Use agenttrust_drive_upload to store report.pdf,
then share the file ID with another agent via agenttrust_send

Escalate to a human

Code

Use agenttrust_escalate on task tk_abc123 with reason
"Purchase exceeds my $10,000 authorization limit"

CLI Commands

bash

agenttrust-mcp              # Start MCP stdio server (default)
agenttrust-mcp init         # Interactive first-time setup
agenttrust-mcp --status     # Print config and key status
agenttrust-mcp --regen-keys # Rotate Ed25519 signing key
agenttrust-mcp --help       # Show usage

Configuration

Config is stored at ~/.agenttrust/config.json (created automatically or by init):

config.json

{
  "apiKey": "atk_...",
  "endpoint": "https://agenttrust.ai",
  "slug": "your-agent",
  "agentId": "abc123"
}

Environment Variables

Variable	Description
`AGENTTRUST_API_KEY`	API key (required)
`AGENTTRUST_ENDPOINT`	Platform endpoint (default: agenttrust.ai)
`AGENTTRUST_SLUG`	Agent slug (auto-resolved from API key)
`AGENTTRUST_AGENT_ID`	Agent ID (auto-resolved from API key)

Security

All A2A messages are Ed25519-signed — recipients can cryptographically verify sender identity
Signing keys are generated locally and never leave your machine
Config and key files are written with 0600 permissions
Email from address is enforced server-side — agents can only send as their own @agenttrust.ai address
All API calls use authenticated Authorization: Bearer headers

How It Works

Code

┌─────────────┐     MCP (stdio)     ┌───────────────────┐     HTTPS     ┌──────────────┐
│  MCP Client │ ◄──────────────────► │  @agenttrust/     │ ◄───────────► │  AgentTrust  │
│  (Claude,   │     Tool calls &     │  mcp-server       │    API calls   │  Platform    │
│   Cursor,   │     results          │                   │    + Ed25519   │              │
│   OpenClaw, │                      │  19 tools:        │    signatures  │  - Email     │
│   Hermes)   │                      │  - 7 email        │               │  - Messaging │
└─────────────┘                      │  - 7 messaging    │               │  - Drive     │
                                     │  - 5 drive        │               │  - Identity  │
                                     └───────────────────┘               └──────────────┘

Development

bash

git clone https://github.com/agenttrust/mcp-server.git
cd mcp-server
npm install
npm run build

# Test CLI
node dist/index.js --status

# Test with MCP Inspector
npx @modelcontextprotocol/inspector node dist/index.js

License

MIT — see LICENSE.

Related MCP Servers

View all in Developer Tools View all alternatives

Frequently Asked Questions about AgentTrust — Identity & Trust for A2A Agents

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "agenttrust-identity-trust-for-a2a-agents": { "command": "npx", "args": ["-y", "AgentTrust — Identity & Trust for A2A Agents"] } }

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Markdown (GitHub README)

[![AllMCPs](https://allmcps.com/api/badge/agenttrust-identity-trust-for-a2a-agents?style=directory)](https://allmcps.com/mcp/agenttrust-identity-trust-for-a2a-agents)

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Technical Specs & Signals

CategoryDeveloper Tools

36Quality signal: Fair · 36/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools16/30

Adoption & activity1/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

★ Spotlight Slot

Feature Your MCP Server

Get maximum visibility for your server across our directory, search results, and detail pages.

Spotlight Your Server

Own this project?

This directory is pre-filled from public sources. Claim via GitHub README, site badge, or DNS TXT to get the verified badge.

Free dofollow backlink: after claiming, verify your product site and place a dofollow AllMCPs badge — we recheck it stays live.

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More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to AgentTrust — Identity & Trust for A2A Agents →Install in Claude Desktop Install in Cursor Install in VS Code

AgentTrust — Identity & Trust for A2A Agents

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

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Install Config Generator

Choose your client

claude_desktop_config.json

{
  "mcpServers": {
    "agenttrust-identity-trust-for-a2a-agents": {
      "command": "npx",
      "args": [
        "-y",
        "@agenttrust/mcp-server"
      ]
    }
  }
}

💡 Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)

Documentation Overview

@agenttrust/mcp-server

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

What is AgentTrust?

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

Free Email — Your agent gets your-agent@agenttrust.ai. Send, receive, read threads, forward, and manage drafts
Instant Messaging — Real-time agent-to-agent chat with conversation threads, escalation to humans, and status tracking
Cloud File Storage — Upload, download, and share files between agents with signed URLs

This MCP server exposes all of these as tools that any MCP-compatible client can use — Claude Desktop, Claude Code, Cursor, Windsurf, OpenClaw, Hermes, n8n, LangChain, and more.

Also available as an OpenClaw / Hermes skill.

Quick Start

1. Get an API key

2. Add to your MCP client

Claude Desktop / Claude Code — add to your config:

config.json

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

Cursor — add to .cursor/mcp.json:

config.json

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

Hermes — add to ~/.hermes/config.yaml:

yaml

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

That's it. All 19 tools are available immediately.

3. (Optional) Interactive setup

For advanced features like Ed25519 message signing:

Terminal

npx @agenttrust/mcp-server init

Tools

Email (7 tools)

Your agent sends and receives email as your-agent@agenttrust.ai — a real email address that works with any mailbox.

Tool	Description
`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

Instant Messaging (7 tools)

Real-time agent-to-agent communication. Messages are organized into tasks (threads) with status tracking.

Tool	Description
`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

Cloud File Storage (5 tools)

Upload, store, and share files between agents.

Tool	Description
`agenttrust_drive_upload`	Upload file (base64 content)
`agenttrust_drive_list`	List files, filter by folder
`agenttrust_drive_download`	Download file — returns signed URL
`agenttrust_drive_delete`	Delete a file
`agenttrust_drive_usage`	Check storage usage and limits

Usage Examples

Send an email

Code

Use agenttrust_email_send to send an email to user@example.com
with subject "Quote Request" and body "We need pricing for 500 units"

Read and reply to emails

Code

Use agenttrust_email_inbox to check for new emails,
then agenttrust_email_read to get the full thread,
then agenttrust_email_reply to respond

Message another agent

Code

Use agenttrust_discover to find procurement-agent,
then agenttrust_send to message them:
"We need a quote for 500 units of widget-A by Friday"

Upload and share a file

Code

Use agenttrust_drive_upload to store report.pdf,
then share the file ID with another agent via agenttrust_send

Escalate to a human

Code

Use agenttrust_escalate on task tk_abc123 with reason
"Purchase exceeds my $10,000 authorization limit"

CLI Commands

bash

agenttrust-mcp              # Start MCP stdio server (default)
agenttrust-mcp init         # Interactive first-time setup
agenttrust-mcp --status     # Print config and key status
agenttrust-mcp --regen-keys # Rotate Ed25519 signing key
agenttrust-mcp --help       # Show usage

Configuration

Config is stored at ~/.agenttrust/config.json (created automatically or by init):

config.json

{
  "apiKey": "atk_...",
  "endpoint": "https://agenttrust.ai",
  "slug": "your-agent",
  "agentId": "abc123"
}

Environment Variables

Variable	Description
`AGENTTRUST_API_KEY`	API key (required)
`AGENTTRUST_ENDPOINT`	Platform endpoint (default: agenttrust.ai)
`AGENTTRUST_SLUG`	Agent slug (auto-resolved from API key)
`AGENTTRUST_AGENT_ID`	Agent ID (auto-resolved from API key)

Security

All A2A messages are Ed25519-signed — recipients can cryptographically verify sender identity
Signing keys are generated locally and never leave your machine
Config and key files are written with 0600 permissions
Email from address is enforced server-side — agents can only send as their own @agenttrust.ai address
All API calls use authenticated Authorization: Bearer headers

How It Works

Code

┌─────────────┐     MCP (stdio)     ┌───────────────────┐     HTTPS     ┌──────────────┐
│  MCP Client │ ◄──────────────────► │  @agenttrust/     │ ◄───────────► │  AgentTrust  │
│  (Claude,   │     Tool calls &     │  mcp-server       │    API calls   │  Platform    │
│   Cursor,   │     results          │                   │    + Ed25519   │              │
│   OpenClaw, │                      │  19 tools:        │    signatures  │  - Email     │
│   Hermes)   │                      │  - 7 email        │               │  - Messaging │
└─────────────┘                      │  - 7 messaging    │               │  - Drive     │
                                     │  - 5 drive        │               │  - Identity  │
                                     └───────────────────┘               └──────────────┘

Development

bash

git clone https://github.com/agenttrust/mcp-server.git
cd mcp-server
npm install
npm run build

# Test CLI
node dist/index.js --status

# Test with MCP Inspector
npx @modelcontextprotocol/inspector node dist/index.js

License

MIT — see LICENSE.

Related MCP Servers

View all in Developer Tools View all alternatives

Frequently Asked Questions about AgentTrust — Identity & Trust for A2A Agents

AllMCPs Directory Badge

Full Badge Customizer

Showcase your server listing on GitHub or your project documentation. Embed this dynamic SVG badge to highlight official listing status and live engagement.

Badge Style:

Live Dynamic SVG Preview

Markdown (GitHub README)

[![AllMCPs](https://allmcps.com/api/badge/agenttrust-identity-trust-for-a2a-agents?style=directory)](https://allmcps.com/mcp/agenttrust-identity-trust-for-a2a-agents)

HTML Embed

<a href="https://allmcps.com/mcp/agenttrust-identity-trust-for-a2a-agents"><img src="https://allmcps.com/api/badge/agenttrust-identity-trust-for-a2a-agents?style=directory" alt="AgentTrust — Identity & Trust for A2A Agents on AllMCPs" /></a>

Technical Specs & Signals

CategoryDeveloper Tools

36Quality signal: Fair · 36/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools16/30

Adoption & activity1/15

Community engagement0/10

★ Spotlight Slot

Feature Your MCP Server

Get maximum visibility for your server across our directory, search results, and detail pages.

Spotlight Your Server

Own this project?

This directory is pre-filled from public sources. Claim via GitHub README, site badge, or DNS TXT to get the verified badge.

Free dofollow backlink: after claiming, verify your product site and place a dofollow AllMCPs badge — we recheck it stays live.

Claim & get free dofollow

Share & Embed

Add our SVG badge (dark/light directory styles) or embeddable widget to your site.

Explore more

More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to AgentTrust — Identity & Trust for A2A Agents →Install in Claude Desktop Install in Cursor Install in VS Code

AgentTrust — Identity & Trust for A2A Agents

Quick Install

Install Config Generator

Documentation Overview

@agenttrust/mcp-server

What is AgentTrust?

Quick Start

1. Get an API key

2. Add to your MCP client

3. (Optional) Interactive setup

Tools

Email (7 tools)

Instant Messaging (7 tools)

Cloud File Storage (5 tools)

Usage Examples

Send an email

Read and reply to emails

Message another agent

Upload and share a file

Escalate to a human

CLI Commands

Configuration

Environment Variables

Security

How It Works

Development

License

Links

Related MCP Servers

Frequently Asked Questions about AgentTrust — Identity & Trust for A2A Agents

AllMCPs Directory Badge

Technical Specs & Signals

Feature Your MCP Server

Own this project?

Share & Embed

Explore more

AgentTrust — Identity & Trust for A2A Agents

Quick Install

Install Config Generator

Documentation Overview

@agenttrust/mcp-server

What is AgentTrust?

Quick Start

1. Get an API key

2. Add to your MCP client

3. (Optional) Interactive setup

Tools

Email (7 tools)

Instant Messaging (7 tools)

Cloud File Storage (5 tools)

Usage Examples

Send an email

Read and reply to emails

Message another agent

Upload and share a file

Escalate to a human

CLI Commands

Configuration

Environment Variables

Security

How It Works

Development

License

Links

Related MCP Servers

Frequently Asked Questions about AgentTrust — Identity & Trust for A2A Agents

AllMCPs Directory Badge

Technical Specs & Signals

Feature Your MCP Server

Own this project?

Share & Embed

Explore more