Emaillistchecker.io Email Verification — Claude Code MCP server for email checks
Checks whether an address can receive mail before your agent sends anything: MX, SMTP, catch-all, disposable domains. Useful for signup forms and list cleanup.
claude mcp add --transport http email-verification https://platform.emaillistchecker.io/mcpWhat Emaillistchecker.io Email Verification does
The server runs on the vendor's side, so there is nothing to install locally — you only point your client at https://platform.emaillistchecker.io/mcp over Streamable HTTP with JSON responses. No account is required to start: call the get_api_key tool from inside the agent and you get a key. It is displayed once, stays valid for 30 days, and after that you register again.
verify_email handles a single address and returns one of four verdicts: valid, invalid, risky or unknown. A risky result covers catch-all domains, role and disposable mailboxes, plus Microsoft 365 addresses the receiving server could not confirm. For lists there is verify_batch, which takes up to 25 addresses per call and gives a verdict for each. explain_result turns a verdict into a plain-language explanation with a send recommendation, while estimate_cost and get_credit_balance let you check credits first.
A free agent key allows 25 verifications per day, and unused ones do not carry over. Rate limits apply: 10 requests per minute per key, with only one request in flight at a time. Once the shared daily pool for free keys runs out, the server returns HTTP 429 until 00:00 UTC. Inbox placement, blacklist monitoring and the email finder need a full account.
What it helps with
- drop dead addresses before a send goes out
- check a batch of signup emails at once
- spot a disposable mailbox among real ones
- get a plain explanation for a borderline verdict
- read the credit balance before a bulk run
Example prompts for the agent
- Verify
[email protected]and tell me if it is safe to send - Run these 20 signup addresses through
verify_batch - Explain why this address came back as
risky
How to install Emaillistchecker.io Email Verification
Platform CLI: remote server
claude mcp add --transport http email-verification https://platform.emaillistchecker.io/mcpPlatform CLI: remote server
codex mcp add emaillistcheckerio-email-verification --url https://platform.emaillistchecker.io/mcpConfig file
{
"mcpServers": {
"emaillistcheckerio-email-verification": {
"url": "https://platform.emaillistchecker.io/mcp"
}
}
}Config file
{
"servers": {
"emaillistcheckerio-email-verification": {
"type": "http",
"url": "https://platform.emaillistchecker.io/mcp"
}
}
}Platform CLI: remote server
gemini mcp add -t http emaillistcheckerio-email-verification https://platform.emaillistchecker.io/mcpStep by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about Emaillistchecker.io Email Verification
How do I install Emaillistchecker.io Email Verification in Claude Code?
Run claude mcp add --transport http email-verification https://platform.emaillistchecker.io/mcp. You can fetch a key afterwards by calling the get_api_key tool.
What does Emaillistchecker.io Email Verification do?
It gives the agent email-checking tools: single verification, batches of up to 25 addresses, verdict explanations and credit checks. Verdicts are valid, invalid, risky and unknown.
How many free verifications do I get?
A free key covers 25 verifications per day, unused ones do not roll over, and the key itself expires after 30 days. Throughput is capped at 10 requests per minute with one request in flight.
