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Give AI agents (Claude, Cursor) a real email address with 27 MCP tools for inbox, send, reply, contacts, search, and more via KeyID.ai
npx skill4agent add aradotso/trending-skills keyid-agent-kit-mcpSkill by ara.so — Daily 2026 Skills collection.
npm install @keyid/agent-kit
# or
yarn add @keyid/agent-kit
# or run directly without installing
npx @keyid/agent-kit| Variable | Description | Default |
|---|---|---|
| Ed25519 public key (hex) | Auto-generated on first run |
| Ed25519 private key (hex) | Auto-generated on first run |
| API base URL | |
~/Library/Application Support/Claude/claude_desktop_config.json%APPDATA%\Claude\claude_desktop_config.json{
"mcpServers": {
"keyid": {
"command": "npx",
"args": ["@keyid/agent-kit"],
"env": {
"KEYID_PUBLIC_KEY": "$KEYID_PUBLIC_KEY",
"KEYID_PRIVATE_KEY": "$KEYID_PRIVATE_KEY"
}
}
}
}.cursor/mcp.json{
"mcpServers": {
"keyid": {
"command": "npx",
"args": ["@keyid/agent-kit"],
"env": {
"KEYID_PUBLIC_KEY": "$KEYID_PUBLIC_KEY",
"KEYID_PRIVATE_KEY": "$KEYID_PRIVATE_KEY"
}
}
}
}# 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>keyid_provision — Register agent, get assigned email address
keyid_get_email — Get the current active email addresskeyid_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 messageskeyid_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 draftkeyid_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 addresskeyid_list_contacts — List all saved contacts
keyid_create_contact — Create a contact (name, email, notes)
keyid_delete_contact — Delete a contact by IDkeyid_list_webhooks — List configured webhooks
keyid_create_webhook — Register a webhook URL for inbound events
keyid_get_webhook_deliveries — View delivery history and failureskeyid_manage_list — Add/remove addresses from allow or blocklist
keyid_get_metrics — Query usage metrics (sent, received, bounces)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' },
});// 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 });
// Send an email
callTool('keyid_send', {
to: 'colleague@example.com',
subject: 'Hello from my AI agent',
body: 'This email was sent by an AI agent using KeyID.',
});
// Reply to a message
callTool('keyid_reply', {
message_id: 'msg_abc123',
body: 'Thanks, I will review this today.',
});
// Search inbox
callTool('keyid_get_inbox', {
query: 'from:alice@company.com subject:report',
unread_only: true,
});
// Set auto-reply
callTool('keyid_set_auto_reply', {
enabled: true,
subject: 'Out of Office',
body: 'I am currently unavailable. My AI agent will respond shortly.',
});
// Create a contact
callTool('keyid_create_contact', {
name: 'Alice Smith',
email: 'alice@company.com',
notes: 'Project lead for Q1 initiative',
});
// Schedule an email
callTool('keyid_send', {
to: 'team@company.com',
subject: 'Weekly Update',
body: 'Here is the weekly status...',
scheduled_at: '2026-03-25T09:00:00Z',
});
// Set email signature
callTool('keyid_set_signature', {
signature: 'Best regards,\nAI Agent\npowered by KeyID.ai',
});
// Get metrics
callTool('keyid_get_metrics', {
period: '7d',
});import { Client } from '@modelcontextprotocol/sdk/client/index.js';
import { StdioClientTransport } from '@modelcontextprotocol/sdk/client/stdio.js';
const transport = new StdioClientTransport({
command: 'npx',
args: ['@keyid/agent-kit'],
env: {
KEYID_PUBLIC_KEY: process.env.KEYID_PUBLIC_KEY,
KEYID_PRIVATE_KEY: process.env.KEYID_PRIVATE_KEY,
},
});
const client = new Client(
{ name: 'my-email-agent', version: '1.0.0' },
{ capabilities: {} }
);
await client.connect(transport);
// List available tools
const tools = await client.listTools();
console.log('Available tools:', tools.tools.map(t => t.name));
// Get email address
const emailResult = await client.callTool({
name: 'keyid_get_email',
arguments: {},
});
console.log('Agent email:', emailResult.content[0].text);
// Check unread
const unread = await client.callTool({
name: 'keyid_get_unread_count',
arguments: {},
});
console.log('Unread count:', unread.content[0].text);
// Send email
await client.callTool({
name: 'keyid_send',
arguments: {
to: 'recipient@example.com',
subject: 'Automated report',
body: 'Your daily report is attached.',
html: '<p>Your <strong>daily report</strong> is attached.</p>',
},
});
await client.close();import express from 'express';
const app = express();
app.use(express.json());
// Endpoint to receive KeyID webhook events
app.post('/keyid-webhook', (req, res) => {
const event = req.body;
if (event.type === 'message.received') {
const { from, subject, body, message_id } = event.data;
console.log(`New email from ${from}: ${subject}`);
// Trigger your agent logic here
handleIncomingEmail({ from, subject, body, message_id });
}
res.json({ ok: true });
});
app.listen(3000);
// Register the webhook via the MCP tool
// (call this once via your agent)
// callTool('keyid_create_webhook', {
// url: 'https://your-server.com/keyid-webhook',
// events: ['message.received'],
// });// Generate and store keys once, reuse forever
import { writeFileSync, readFileSync, existsSync } from 'fs';
import { generateKeyPairSync } from 'crypto'; // or use @noble/ed25519
const KEY_FILE = '.keyid-keys.json';
function loadOrCreateKeys() {
if (existsSync(KEY_FILE)) {
return JSON.parse(readFileSync(KEY_FILE, 'utf8'));
}
// Let @keyid/agent-kit auto-generate on first run,
// then save what it prints to stderr
// Or pre-generate using @noble/ed25519:
// const privKey = randomBytes(32);
// const pubKey = await ed.getPublicKeyAsync(privKey);
return null; // will auto-generate
}// Poll inbox and process new messages
async function agentEmailLoop(client) {
while (true) {
const result = await client.callTool({
name: 'keyid_get_inbox',
arguments: { unread_only: true, limit: 5 },
});
const messages = JSON.parse(result.content[0].text);
for (const msg of messages) {
// Process with your LLM/agent logic
const agentResponse = await processWithAgent(msg);
// Reply
await client.callTool({
name: 'keyid_reply',
arguments: {
message_id: msg.id,
body: agentResponse,
},
});
// Mark as read
await client.callTool({
name: 'keyid_update_message',
arguments: { message_id: msg.id, read: true },
});
}
// Wait 60 seconds before next poll
await new Promise(r => setTimeout(r, 60_000));
}
}// Create draft, review, then send
const draft = await client.callTool({
name: 'keyid_create_draft',
arguments: {
to: 'client@example.com',
subject: 'Proposal',
body: draftBody,
},
});
const draftId = JSON.parse(draft.content[0].text).id;
// Human or agent reviews...
// Then send:
await client.callTool({
name: 'keyid_send_draft',
arguments: { draft_id: draftId },
});KEYID_PUBLIC_KEYKEYID_PRIVATE_KEYnpxkeyid_provisionkeyid_get_emailkeyid_manage_listkeyid_get_metricsnpx @keyid/agent-kit2024-11-05