Verify emails from any AI agent.

1. 1

   Sign up

   At app.skink.dev. 100 free credits, no card.

2. 2

   Create a key

   Dashboard, Keys. Copy it now. It is shown once.

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

Where it goes

Claude Desktop

Settings, Developer, Edit Config. Paste into claude_desktop_config.json.

Claude Code

Run the command in your terminal.

Cursor

Settings, MCP, Add new MCP server. Paste into mcp.json.

Other clients

Use the Streamable HTTP transport at https://api.skink.dev/mcp with the header Authorization: Bearer SKINK_API_KEY.

verify_email returns the same result as POST /v1/verify and costs the same. See the fields.

emailstring

Address to verify. Required.

fast_failboolean

Skips the live mailbox check for a faster, coarser result. Also the quickest disposable check.

effortstandard or thorough

thorough spends longer on hard cases. More latency. Not allowed with fast_fail.

{
  "name": "verify_email",
  "arguments": { "email": "jane.doe@acme.com" }
}