MCP server · checkmails

checkmails MCP server

Official remote MCP server published by checkmails.eu for SMTP email verification from AI agents (Claude, Cursor, ChatGPT, any MCP client). JSON-RPC 2.0, MCP protocol revision 2025-06-18.

Open endpoint → checkmails provider profile

One-click install for Cursor, VS Code, Claude, and 20+ other MCP clients, powered by API Commons MCP Install — visit install.apicommons.org for more information.

Provider: checkmails Type: Hosted endpoint Transport: Host: checkmails.eu

Endpoint

https://checkmails.eu/api/mcp

Hosted endpoint · transport

Connect

This is a remote MCP server — point an MCP client at the endpoint URL. Clients with native remote support (Claude, Cursor, VS Code, …):

# mcp client config (e.g. .mcp.json / mcp settings) { "mcpServers": { "checkmails-eu": { "url": "https://checkmails.eu/api/mcp" } } }

For stdio-only clients (older Claude Desktop, etc.), bridge with mcp-remote:

# Add to claude_desktop_config.json { "mcpServers": { "checkmails-eu": { "command": "npx", "args": ["-y", "mcp-remote", "https://checkmails.eu/api/mcp"] } } }

If the server requires authentication, add the provider's token/header (e.g. an X-API-Key) per its docs. A quick reachability check:

curl -i -X POST https://checkmails.eu/api/mcp \ -H "Content-Type: application/json" -H "Accept: application/json, text/event-stream" \ -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Tools

verify_email — Verify a single address by SMTP (RCPT TO) without sending any message. Costs 1 credit. Returns a verdict (valid / invalid / indeterminate), a risk score (0-100) and diagnostic flags.
verify_bulk — Verify a batch of up to 1000 addresses asynchronously. Returns a job_id. Costs 1 credit per address with a definitive verdict; optional consent flag acknowledges recipient consent.
get_job — Get the status and results of a bulk job.

About MCP

The Model Context Protocol (MCP) is an open protocol Anthropic introduced for connecting LLM-based agents to external tools and data sources. Providers publish MCP servers that expose their API surface as structured, discoverable tools — an MCP-compatible client (Claude Desktop, Cursor, Cline, Continue, etc.) can connect to the server and call its tools without any per-provider integration code.

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Call it yourself

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This MCP server

curl "https://apis.io/api/v1/mcp/checkmails-mcp-server"

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