Built for agents as much as for people

An agent that sends email cannot see a bounce coming. Give it a check to run first: verify an address before it writes, clean a list before a sequence starts, and read why each address was kept or removed.

Get an API key API reference MCP server

Three ways in

Same checks and the same credits behind each one. Pick the one that fits how your agent is built.

REST API

Real-time verification of one address, list upload, jobs and per-address results. Described by an OpenAPI 3.1 spec, so an agent framework can load it as tools.

openapi.json

Analyzemail MCP server

For Claude, Cursor and any MCP client: verify an address, clean a list file, follow the job and download the verified addresses. Open source.

github.com/analyzemail/mcp

send-guard, by AskEleven

Free local checks with no account (syntax, dead domains, disposable inboxes, typos), then mailbox checks through Analyzemail for the addresses that passed. CLI, MCP server and library.

github.com/askeleven/send-guard

Two minutes to the first check

Create an API key in your account, then call the API or add the MCP server to your client.

Every result says why: the status, the mail server’s reply, and flags for catch-all, disposable, role, spam-trap and litigator addresses, so the agent can explain what it removed.
A real-time check the mail server does not answer is refunded.
The MCP server and send-guard check your balance first and refuse to start a list that would cost more than the cap you set.
250 free checks a month on any account with a confirmed email address.

Verify one address

curl -X POST https://analyzemail.com/api/v2/verify \
  -H "X-API-Key: $ANALYZEMAIL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"email": "[email protected]"}'

Add the MCP server to Claude Desktop, Cursor or Claude Code

{
  "mcpServers": {
    "analyzemail": {
      "command": "npx",
      "args": ["-y", "@analyzemail/mcp"],
      "env": { "ANALYZEMAIL_API_KEY": "am_live_..." }
    }
  }
}

In partnership with AskEleven

AskEleven builds and runs AI employees for businesses: roles that answer, follow up, book and report inside the tools a business already uses. Their agents send real email to real customers, and they check every list with Analyzemail first.

What they learn in production they publish as free, MIT-licensed tools for anyone running agents. send-guard is one of them, and its mailbox checks run on Analyzemail. AskEleven customers get 25,000 checks a month included.

Receiving cold email instead?

Most businesses are on the other end: their inbox fills with automated outreach. See how to keep it out.

Give your agent a check to run before it sends.

Create an account and an API key. The first 250 checks each month are free. Questions first? Email [email protected].

Get started