KeyID Agent Kit

Give Claude, Cursor, or any MCP client a real email address. Free. No signup.

27 email tools via Model Context Protocol (MCP): send, receive, reply, search inbox, manage contacts, set auto-reply, schedule delivery — everything an AI agent needs to handle email autonomously.

Powered by KeyID.ai — free email infrastructure for AI agents. No human registration, no API keys to manage, no cost.

Install

npm install @keyid/agent-kit
# or
yarn add @keyid/agent-kit

Usage

With Claude Desktop

Add to claude_desktop_config.json:

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

With any MCP client

# Run directly
npx @keyid/agent-kit

# Or with existing keypair
KEYID_PUBLIC_KEY=abc123 KEYID_PRIVATE_KEY=def456 npx @keyid/agent-kit

Environment Variables

Variable	Description	Default
KEYID_BASE_URL	API base URL	https://keyid.ai
KEYID_PUBLIC_KEY	Ed25519 public key (hex)	Auto-generated
KEYID_PRIVATE_KEY	Ed25519 private key (hex)	Auto-generated

Tools (27)

Identity & Auth

Tool	Description
keyid_provision	Register agent, get email address
keyid_get_email	Get current active email

Messages

Tool	Description
keyid_get_inbox	Fetch inbox (with search, filtering)
keyid_send	Send email (scheduled, display name, HTML)
keyid_reply	Reply to a message
keyid_forward	Forward a message
keyid_update_message	Update read/starred status
keyid_get_unread_count	Count unread messages

Threads & Drafts

Tool	Description
keyid_list_threads	List conversation threads
keyid_get_thread	Get thread with messages
keyid_create_draft	Create a draft
keyid_send_draft	Send a draft

Settings

Tool	Description
keyid_get_auto_reply	Get auto-reply settings
keyid_set_auto_reply	Configure vacation responder
keyid_get_signature	Get email signature
keyid_set_signature	Set email signature
keyid_get_forwarding	Get forwarding settings
keyid_set_forwarding	Configure forwarding

Contacts

Tool	Description
keyid_list_contacts	List saved contacts
keyid_create_contact	Create a contact
keyid_delete_contact	Delete a contact

Webhooks

Tool	Description
keyid_list_webhooks	List webhooks
keyid_create_webhook	Create webhook
keyid_get_webhook_deliveries	Delivery history

Lists & Metrics

Tool	Description
keyid_manage_list	Add/remove from allow/blocklist
keyid_get_metrics	Query usage metrics

Example Conversation

User: Check my email

Agent: [calls keyid_get_inbox]
You have 3 new messages:
1. [email protected] — "Q1 Report" (2 hours ago)
2. [email protected] — "Meeting tomorrow" (5 hours ago)
3. [email protected] — "Password reset" (1 day ago)

User: Reply to Alice saying I'll review it today

Agent: [calls keyid_reply with message_id and body]
Reply sent to [email protected].

Protocol

Uses MCP JSON-RPC over stdio (protocol version 2024-11-05). Compatible with Claude Desktop, Cursor, and any MCP client.

License

MIT