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Model Context Protocol

Verify emails from any AI agent.

Hosted MCP server, one verify_email tool. No install.

01 — setup

Get a key.

Sign up at app.skink.dev — 100 free credits, no card. Create a key under Dashboard → Keys.

02 — config

Client config.

Replace SKINK_API_KEY with your key in each.

Claude Desktop

Settings → Developer → Edit Config, paste this in:

{
  "mcpServers": {
    "skink": {
      "command": "npx",
      "args": ["mcp-remote", "https://api.skink.dev/mcp", "--header", "Authorization:Bearer SKINK_API_KEY"]
    }
  }
}

Claude Code

Run in your terminal:

claude mcp add skink -- npx mcp-remote https://api.skink.dev/mcp \
  --header "Authorization:Bearer SKINK_API_KEY"

Cursor

Settings → MCP → Add new MCP server, paste this in:

{
  "mcpServers": {
    "skink": {
      "command": "npx",
      "args": ["mcp-remote", "https://api.skink.dev/mcp", "--header", "Authorization:Bearer SKINK_API_KEY"]
    }
  }
}

Other clients: use the Streamable HTTP transport at https://api.skink.dev/mcp, with an Authorization: Bearer SKINK_API_KEY header.

03 — reference

Tool reference.

argumentmeaning
emailAddress to verify. Required.
fast_failOptional. Skip the SMTP probe for a faster, lower-confidence result.
effortOptional. thorough retries harder against catch-all/greylist servers, at higher latency. Mutually exclusive with fast_fail.
{
  "name": "verify_email",
  "arguments": { "email": "jane.doe@acme.com", "fast_fail": false }
}

Plain HTTP instead?

See the API docs