# MailerCheck — MCP server on mcp.ai
> Connect your MailerCheck account and use 9 tools for email straight from your AI agent. Connect with your own API key. MailerCheck verifies individual email addresses and email lists, reports verification results, and tracks account credit balances.

By: mcp.ai · official
Page: https://mcp.ai/mailercheck

## Connect (MCP protocol)
Remote MCP endpoint (HTTP, streamable): https://api.mcp.ai/p_mailercheck?ms=1787293620000
Add it as a custom/remote MCP connector, then authenticate when prompted.

## REST API (no MCP client required)
Every tool is also a REST endpoint, authed with a workspace API key.
Discover: GET https://api.mcp.ai/api/mailercheck/_endpoints   # public; lists every endpoint
Call:     POST https://api.mcp.ai/api/mailercheck/<endpoint>
  Authorization: Bearer sk_live_…   # create one at https://mcp.ai/settings/api-keys
  Content-Type: application/json
  Body: { …args }   →   { "ok": true, "tool": "<id>", "result": { … } }

## Developer docs
How to use (MCP or REST), markdown: https://mcp.ai/mailercheck/skill.md
Postman collection (v2.1): https://mcp.ai/mailercheck/postman.json

## Tools
- mailercheck_create_verification_list(name: string, emails: string[]) — Create a MailerCheck verification list by ingesting a name and email-address array. Creating a one-address list did not reduce the account credit balance during live probing. This action does not invo
- mailercheck_delete_verification_list(list_id: integer) — Permanently and irreversibly delete a MailerCheck verification list by ID. Use only when the caller explicitly intends to remove the list.
- mailercheck_get_credit_balance() — Return the current MailerCheck verification-credit balance. Use this before VERIFY_EMAIL or START_LIST_VERIFICATION when cost matters.
- mailercheck_get_current_account() — Return the connected MailerCheck user and account identity. Use this to confirm which user and account the API token represents.
- mailercheck_get_verification_list(list_id: integer) — Return one verification list, including its status, item count, verification timing, and aggregate result statistics.
- mailercheck_list_verification_lists(next_cursor?: string) — Return one page of verification lists for the connected MailerCheck account, with an opaque cursor when another provider-controlled page exists.
- mailercheck_list_verification_results(limit?: integer, result?: string, list_id: integer, next_cursor?: string) — Return one page of email-level results for a verification list, optionally filtered by classification. The success envelope and pagination behavior are based on MailerCheck documentation and were not 
- mailercheck_start_list_verification(list_id: integer) — Irreversibly start verification of every address in a MailerCheck list. A successful call spends one verification credit per address. Before calling, use GET_VERIFICATION_LIST to inspect the list coun
- mailercheck_verify_email(email: string) — Consumes exactly one MailerCheck verification credit on every successful call. Synchronously verify one email address and return its classification; check GET_CREDIT_BALANCE first if cost matters.

## Example prompts
- "What can I do in MailerCheck?"
- "Show me a summary of my MailerCheck account"

## Links
Docs: https://mcp.ai/docs/mcps/mailercheck
Website: https://mcp.ai/mcps/mailercheck