MailTester Email Verification

com.mailtesterv1.0.1更新于 Oct 9, 2026

Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.

已验证Streamable HTTP可网页运行Business & CommerceCommunication & Collaboration

概览

AI 生成的概览

让助手检查某个邮箱地址能否收信，返回有效、无效、有风险或未知的判定结果。

功能
这是一个托管式邮箱验证 MCP 服务器。工具包括 verify_email（验证单个地址）、verify_batch（每次最多 25 个地址）、get_api_key（获取免费密钥）、explain_result（用通俗语言解释判定并给出是否发送的建议），以及 estimate_cost、get_credit_balance、get_batch_status、list_lists 和 get_list（用于额度与已保存列表）。判定涵盖 MX、SMTP、全接收、角色地址和一次性邮箱等检查。
适用场景
适合在发信或接受注册之前使用，让助手确认地址可投递而不是靠猜测。也适合批量清理地址列表，以及解释某个地址为何被标记。
运行要求
远程托管端点，无需安装。需要密钥，通过 Authorization 请求头以 Bearer 形式发送；可用 get_api_key 工具或注册端点获取，无需账号。需要能访问该服务商的网络。
安装前请注意
Authorization 请求头携带密钥，属于敏感凭据；密钥只显示一次，30 天后过期，免费密钥每天 25 次验证，且有共享的每日容量与速率限制。验证会把提交的地址发送给第三方服务，应视为数据离开本地环境。批量调用按地址数消耗额度。

安装

在 SourceWeft 中

  1. 打开 控制台中的 MailTester Email Verification，将其添加到工作区。
  2. 为需要使用其工具的对话启用该服务。

Web executable，通过 Streamable HTTP。 远程服务在工作区中配置后即可从网页运行时运行。

其他 MCP 客户端

把它添加到你客户端的 mcpServers 配置中。

{
  "mcpServers": {
    "email-verification": {
      "type": "http",
      "url": "https://app.mailtester.com/mcp"
    }
  }
}

README

MailTester MCP server — email verification for AI agents

Remote Model Context Protocol server that tells an AI agent whether an email address can receive mail before anything is sent to it.

The server is hosted; there is nothing to install. This repository documents how to connect.

Get a key (no account needed)

Connect without a key and call the get_api_key tool, or:

bash
curl -X POST https://app.mailtester.com/agent-gateway/register \  -H 'Content-Type: application/json' \  -d '{"name":"my-agent","purpose":"verify signup emails"}'

The key is shown once. Each key gets 25 free verifications per day (unused credits do not roll over) and expires after 30 days; register again when it does. Send it as Authorization: Bearer <api_key>.

Connect

Claude Code

bash
claude mcp add --transport http mailtester https://app.mailtester.com/mcp --header "Authorization: Bearer YOUR_KEY"

Claude Desktop / Cursor / VS Code (mcp.json-style config)

json
{  "mcpServers": {    "mailtester": {      "type": "http",      "url": "https://app.mailtester.com/mcp",      "headers": { "Authorization": "Bearer YOUR_KEY" }    }  }}

Tools

ToolWhat it does
get_api_keyGet a free key (works without a key)
verify_emailVerify one address → valid, invalid, risky or unknown (1 credit)
verify_batchVerify up to 25 addresses per call, with per-address verdicts
get_batch_status, list_lists, get_listFollow saved verification lists
explain_resultExplain a verdict in plain English, with a send recommendation
estimate_cost, get_credit_balanceCheck credits before running

Verdicts

  • valid: the mailbox exists and accepts mail
  • invalid: the address or domain cannot receive mail
  • risky: accept-all (catch-all) domain, role or disposable address, or a Microsoft 365 address the mail server couldn't confirm
  • unknown: the receiving server gave no definitive answer

Limits

10 requests per minute per key, one request in flight per key, and a shared daily capacity for free agent keys (HTTP 429 until 00:00 UTC when it is used up). Inbox placement, blacklist monitoring and email finder need a full account at https://mailtester.com.

REST API

The same key works on the REST API: POST https://app.mailtester.com/api/v1/verify, POST https://app.mailtester.com/api/v1/verify/batch, GET https://app.mailtester.com/api/v1/credits. See the OpenAPI description.

来源：README.md，提交 3bc86f2

工具

0
工具元数据尚未被收录。

版本历史

1
  1. v1.0.1最新Oct 9, 2026