KeyID Agent Kit — MCP Email Tools for AI Agents

Skill by ara.so — Daily 2026 Skills collection.

KeyID Agent Kit gives AI agents (Claude, Cursor, or any MCP client) a real, working email address with 27 tools via the Model Context Protocol. No signup, no API keys to acquire manually, no cost. Powered by KeyID.ai.

What It Does

• Provisions a real email address for your AI agent automatically
• Exposes 27 MCP tools: send, receive, reply, forward, search, contacts, drafts, webhooks, auto-reply, signatures, forwarding rules, metrics
• Runs as a stdio MCP server — compatible with Claude Desktop, Cursor, and any MCP client
• Uses Ed25519 keypairs for identity — auto-generated if not provided

Installation

npm install @keyid/agent-kit
# or
yarn add @keyid/agent-kit
# or run directly without installing
npx @keyid/agent-kit

Configuration

Environment Variables

Important: Save the auto-generated keys after first run so your agent keeps the same email address across sessions. The keys are printed to stderr on first launch.

Claude Desktop Setup

Edit ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "keyid": {
      "command": "npx",
      "args": ["@keyid/agent-kit"],
      "env": {
        "KEYID_PUBLIC_KEY": "$KEYID_PUBLIC_KEY",
        "KEYID_PRIVATE_KEY": "$KEYID_PRIVATE_KEY"
      }
    }
  }
}

Cursor Setup

In .cursor/mcp.json at project root or global Cursor settings:

{
  "mcpServers": {
    "keyid": {
      "command": "npx",
      "args": ["@keyid/agent-kit"],
      "env": {
        "KEYID_PUBLIC_KEY": "$KEYID_PUBLIC_KEY",
        "KEYID_PRIVATE_KEY": "$KEYID_PRIVATE_KEY"
      }
    }
  }
}

First Run — Get Your Email Address

# Run once to generate keys and register the agent
npx @keyid/agent-kit
# Keys are printed to stderr — save them!
# Then set them in your environment or config
export KEYID_PUBLIC_KEY=<hex-from-output>
export KEYID_PRIVATE_KEY=<hex-from-output>

All 27 Tools Reference

Identity & Auth

keyid_provision     — Register agent, get assigned email address
keyid_get_email     — Get the current active email address

Messages

keyid_get_inbox          — Fetch inbox; supports search query, filtering, pagination
keyid_send               — Send email (to, subject, body, HTML, scheduled time, display name)
keyid_reply              — Reply to a message by message_id
keyid_forward            — Forward a message to another address
keyid_update_message     — Mark read/unread, star/unstar
keyid_get_unread_count   — Get count of unread messages

Threads & Drafts

keyid_list_threads   — List conversation threads
keyid_get_thread     — Get a thread with all its messages
keyid_create_draft   — Save a draft
keyid_send_draft     — Send a previously saved draft

Settings

keyid_get_auto_reply   — Get current auto-reply/vacation responder config
keyid_set_auto_reply   — Enable/disable auto-reply with custom message
keyid_get_signature    — Get email signature
keyid_set_signature    — Set email signature text/HTML
keyid_get_forwarding   — Get forwarding rules
keyid_set_forwarding   — Add or update forwarding to another address

Contacts

keyid_list_contacts    — List all saved contacts
keyid_create_contact   — Create a contact (name, email, notes)
keyid_delete_contact   — Delete a contact by ID

Webhooks

keyid_list_webhooks           — List configured webhooks
keyid_create_webhook          — Register a webhook URL for inbound events
keyid_get_webhook_deliveries  — View delivery history and failures

Lists & Metrics

keyid_manage_list   — Add/remove addresses from allow or blocklist
keyid_get_metrics   — Query usage metrics (sent, received, bounces)

Real Code Examples

Programmatic MCP Client (Node.js)

import { spawn } from 'child_process';
import { createInterface } from 'readline';

// Start the MCP server as a child process
const server = spawn('npx', ['@keyid/agent-kit'], {
  env: {
    ...process.env,
    KEYID_PUBLIC_KEY: process.env.KEYID_PUBLIC_KEY,
    KEYID_PRIVATE_KEY: process.env.KEYID_PRIVATE_KEY,
  },
  stdio: ['pipe', 'pipe', 'inherit'],
});

// Send a JSON-RPC request
function sendRequest(method, params = {}) {
  const request = {
    jsonrpc: '2.0',
    id: Date.now(),
    method,
    params,
  };
  server.stdin.write(JSON.stringify(request) + '\n');
}

// Read responses
const rl = createInterface({ input: server.stdout });
rl.on('line', (line) => {
  const response = JSON.parse(line);
  console.log('Response:', JSON.stringify(response, null, 2));
});

// Initialize MCP session
sendRequest('initialize', {
  protocolVersion: '2024-11-05',
  capabilities: {},
  clientInfo: { name: 'my-app', version: '1.0.0' },
});

Call a Tool via MCP JSON-RPC

// After initialization, call tools/call
function callTool(toolName, toolArgs) {
  const request = {
    jsonrpc: '2.0',
    id: Date.now(),
    method: 'tools/call',
    params: {
      name: toolName,
      arguments: toolArgs,
    },
  };
  server.stdin.write(JSON.stringify(request) + '\n');
}

// Get inbox
callTool('keyid_get_inbox', { limit: 10 });

how to use keyid-agent-kit-mcp
CursorClaude CodeClineCodexWindsurfGooseGitHub CopilotVS CodeGemini CLIKiloOpencodeKimi CLIRoo ClineAiderContinueZedBolt.newLovablev0Replit AgentSweepSmol DeveloperDevinCavemanAmpAntigravity
How to use keyid-agent-kit-mcp on Cursor
AI-first code editor with Composer
1
Prerequisites
Before installing skills in Cursor, ensure your development environment meets these requirements:
›Cursor installed and configured on your development machine
›Node.js version 16.0+ with npm package manager (verify with node --version)
›Active project directory or workspace where you want to add keyid-agent-kit-mcp
2
Execute installation command
Execute the skills CLI command in your project's root directory to begin installation:
$npx skills add https://github.com/aradotso/trending-skills --skill keyid-agent-kit-mcpcopy
The skills CLI fetches keyid-agent-kit-mcp from GitHub repository aradotso/trending-skills and configures it for Cursor.
3
Select Cursor when prompted
The CLI will show a list of available agents. Use arrow keys to navigate and space to select Cursor:
◆ Which agents do you want to install to?
│
│ ── Universal (.agents/skills) ── always included ────
│   • Amp
│   • Antigravity
│   • Cline
│   • Codex
│ ●Cursor(selected)
│   • Cursor
│   • Windsurf
4
Verify installation
Confirm successful installation by checking the skill directory location:
.cursor/skills/keyid-agent-kit-mcp
Reload or restart Cursor to activate keyid-agent-kit-mcp. Access the skill through slash commands (e.g., /keyid-agent-kit-mcp) or your agent's skill management interface.
⚠
Security & Verification Notice
We perform automated surface-level scans (Gen AI Scanner, Socket, Snyk) during installation. These checks detect common vulnerabilities but do not guarantee complete security. Always review skill source code and verify the publisher's reputation before production use.
Skills execute code in your development environment. Always verify the publisher's identity, review recent commits, and test in isolated environments before production deployment.
Additional Resources
›View source code on GitHub›Skills CLI documentation›Learn more about Cursor›What are agent skills?