Verify Emails from Claude, ChatGPT & Cursor
RocketVerifier ships an official MCP (Model Context Protocol) server. Connect any AI assistant to real-time verification, bulk jobs, and free deliverability tools — one config snippet, no code.
Your AI Assistant Already Knows How to Verify Emails
Increasingly, "clean this list" or "check if this email is real" is a sentence typed into Claude or Cursor — not a trip to a dashboard or a custom script. MCP lets AI assistants call RocketVerifier's full API directly inside the conversation.
None of the major email verification providers have this yet. ZeroBounce, NeverBounce, and Bouncer all require a dashboard upload or hand-rolled API integration. RocketVerifier is the first to be truly agent-native.
Example prompt, right inside your AI assistant:
Verify each one and give me a clean CSV of just
the valid, deliverable addresses."
The agent calls verify_email or
create_bulk_job for you and formats the answer however you asked.
Two Ways to Connect
Pick whichever fits your client. Both expose the exact same ten tools.
Local, via npm
Best for Claude Desktop, Cursor, and Windsurf. Runs on your machine via stdio, no server to manage.
npx @rocketverifier/mcpAdd to your client's MCP config:
{
"mcpServers": {
"rocketverifier": {
"command": "npx",
"args": ["-y", "@rocketverifier/mcp"],
"env": {
"ROCKETVERIFIER_API_KEY": "rv_live_your_api_key"
}
}
}
} Hosted, Zero Install
Best for ChatGPT and any client that supports remote MCP connectors. Just a URL and your API key.
# No install requiredAdd as a remote connector:
URL: https://api.rocketverifier.com/mcp Auth: Bearer rv_live_your_api_key
No npm, no local process, works from any device — including mobile clients.
Full setup guides for Claude Desktop, Cursor, and ChatGPT are in the MCP documentation.
10 Tools, Every Verification Feature
The MCP server exposes the same functionality as the REST API and dashboard.
| Tool | Description |
|---|---|
| verify_email | Real-time deliverability check for a single address with a 0-100 confidence score. |
| create_bulk_job | Submit a list of emails for asynchronous bulk verification. |
| get_job_status | Check progress and summary counts for a bulk job. |
| get_job_results | Fetch paginated per-email results, filterable by classification. |
| list_jobs | List recent bulk verification jobs. |
| cancel_job | Cancel a running bulk verification job. |
| check_credits | Check your current credit balance and usage. |
| check_disposable | Check whether an address or domain is a known disposable provider. |
| mx_lookup | Look up MX records for a domain in priority order. |
| check_domain_auth | Score SPF, DKIM, and DMARC configuration for a domain. |
Common Questions
What is MCP?
The Model Context Protocol (MCP) is an open standard that lets AI assistants like Claude, ChatGPT, and Cursor call external tools and APIs in a structured, typed way. Instead of building a custom plugin for every assistant, an MCP server exposes a set of tools that any compatible client can call.
Do I need to write any code?
No. For the npm package, you add one JSON snippet to your client's MCP configuration. For the hosted endpoint, you just provide a URL and your API key. No installation or coding required for either.
Which AI assistants and tools support MCP?
Claude Desktop, Claude Code, Cursor, and Windsurf support MCP natively via local (stdio) servers. ChatGPT and other clients that support remote MCP connectors can use our hosted Streamable HTTP endpoint directly with just a URL and API key.
Does using MCP tools cost credits?
The free tools (check_disposable, mx_lookup, check_domain_auth) never cost credits. verify_email and bulk verification jobs use the same credits as the API and dashboard — 1 credit per email checked.
Can I test it without spending credits?
Yes. Use a sandbox API key (rv_test_...) with addresses at @sandbox.rocketverifier.com to exercise every tool with realistic responses, free of charge.
Is the MCP server open source?
The @rocketverifier/mcp npm package is open source and available on npm and GitHub. The hosted endpoint runs the same tool definitions server-side behind your API key.
Connect Your AI Assistant Today
Get an API key, drop in the config snippet, and start verifying emails from inside Claude, ChatGPT, or Cursor. 100 free credits included.