Verifly MCP Server

Agent-native email verification over the Model Context Protocol. This server gives any MCP client — Cline, Claude Desktop, Claude Code, Cursor, Windsurf — a clean set of tools to verify email addresses, clean lists, run async bulk jobs, and manage a Verifly account, all without writing a single raw HTTP call.

It is built for autonomous workflows: an agent can self-register for an API key, verify a lead before sending, deduplicate and scrub an import list, kick off a bulk job and poll it to completion, and check its own credits and usage — end to end.

Tools

15 tools cover the full Verifly workflow:

Authentication

Get an API key from https://verifly.email (or have an agent self-register with register_account). The server reads the key from the VERIFLY_API_KEY environment variable. Every Verifly request is authenticated with Authorization: Bearer <key>.

The hosted HTTP transport also accepts a per-request Authorization: Bearer <key> header (which overrides the env var), so each caller can supply their own key.

Install (local, stdio) — recommended for Cline

npx -y verifly-mcp-server

or install it globally:

npm install -g verifly-mcp-server
verifly-mcp-server

Client config

Add this to your MCP client config (Cline: cline_mcp_settings.json; Claude Desktop: claude_desktop_config.json):

{
  "mcpServers": {
    "verifly": {
      "command": "npx",
      "args": ["-y", "verifly-mcp-server"],
      "env": {
        "VERIFLY_API_KEY": "vf_your_api_key"
      }
    }
  }
}

That's the whole setup — no build step, no clone. See llms-install.md for an agent-followable install guide.

Hosted Streamable-HTTP transport

If you'd rather not run anything locally, Verifly hosts the same server as a remote Streamable-HTTP endpoint:

https://verifly.email/mcp

Point any Streamable-HTTP-capable MCP client at that URL and pass your key as an Authorization: Bearer <key> header. Example raw call:

curl -s -X POST https://verifly.email/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "Authorization: Bearer vf_your_api_key" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call",
       "params":{"name":"verify_email","arguments":{"email":"lead@example.com"}}}'

Self-hosting the HTTP transport

`

... View full README on GitHub