# Mailcheck — how to use (mcp.ai)

Connect your Mailcheck account and use 2 tools for email straight from your AI agent. Connect with your own API key. Mailcheck is an email verification service that helps businesses validate email addresses to ensure deliverability and reduce bounce rates.

## Option A — via MCP (recommended)
Remote MCP endpoint (HTTP, streamable): `https://api.mcp.ai/p_mailcheck?ms=1787291520000`
Add it as a custom/remote MCP connector in your client (Claude, Cursor, VS Code…), then authenticate when prompted. Once connected, ask the agent to use the server's tools (e.g. `mailcheck_validate_domain`).

## Option B — via direct REST API
Base URL: `https://api.mcp.ai/api/mailcheck`
Auth: `Authorization: Bearer sk_live_…` — create a workspace API key at https://mcp.ai/settings/api-keys
Discover endpoints: `GET https://api.mcp.ai/api/mailcheck/_endpoints`

### Endpoints
- `POST https://api.mcp.ai/api/mailcheck/validate/domain` — Tool to validate a domain for disposability, MX records, domain age, and spam indicators. Use when checking if a domain is associated with temporary email services, public email providers, or forwardi
  - body: { domain: string }
- `POST https://api.mcp.ai/api/mailcheck/verify/email` — Tool to verify provided email address. Use after obtaining user email input.
  - body: { email: string, accept_role?: boolean, accept_disposable?: boolean }

## Example prompts
- "What can I do in Mailcheck?"
- "Show me a summary of my Mailcheck account"

## More
- Page: https://mcp.ai/mailcheck
- Agent spec (llms.txt): https://mcp.ai/mailcheck/llms.txt
- Postman collection: https://mcp.ai/mailcheck/postman.json