Mail Security Tools MCP Server

by mailsecuritytools-api Your server? Claim it

answering

Mail Security Tools is answering right now. Last checked 12 min ago. It exposes 7 tools.

DMARC/SPF/DKIM/MX checks, email score, 100-domain bulk score, webhook watch alerts (x402 USDC).

Uptime history 48 hours of history

48 hours agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

220 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 3

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 15 October 2026. No other catalogue keeps this.

15 Oct 2 tools appeared bulk_email_security_score, watch_status

15 Oct a tool changed version

Nothing serious here today

Today is the operative word: we check Mail Security Tools every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add email-security --transport http https://api.mailsecuritytools.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "email-security": {
      "url": "https://api.mailsecuritytools.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.email-security]
url = "https://api.mailsecuritytools.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "email-security": {
      "url": "https://api.mailsecuritytools.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "email-security": {
      "url": "https://api.mailsecuritytools.com/mcp"
    }
  }
}

Available tools 7

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

check_email_address

Check one email address: syntax, MX / null MX, disposable domain, role account, free provider; verdict ok / risky / undeliverable. No SMTP probe. Costs $0.01 USDC via x402; errors are not charged.

email_fix_plan

Email security fix plan for one domain: the exact SPF, DKIM and DMARC records to publish (create / replace / keep, name, value, why), in order, with click-path steps for the domain's DNS host and a staged DMARC rollout. Non-sending domains get a lock-down set. Costs $1 USDC via x402; errors are not charged.

email_security_score

Grade a domain's email security 0-100 (A-F): SPF 30, DMARC 40, DKIM 25, MX 5, from live DNS, with findings and the top 3 fixes. Read-only. Costs $0.01 USDC via x402; errors are not charged.

bulk

bulk_email_security_score

Score up to 100 domains' email security in one call (SPF 30, DMARC 40, DKIM 25, MX 5 from live DNS): per-domain score, grade and issues, plus a summary with grade counts, domains missing DMARC or SPF, and the worst 10. For MSPs and agents checking a client or vendor list. Costs $0.50 USDC via x402; errors are not charged.

domain

check_domain_email_security

Free. Look up a domain's MX, SPF (record, DNS lookup count, all qualifier), DMARC (policy, rua) and DKIM (common selectors, key size) from live DNS and list issues. No payment.

pricing

pricing

Free. Prices of the paid tools, payment network and receiving address.

watch

watch_status

Free. Status of a paid email setup watch (created with POST /v1/watch): items, expiry, last check, last webhook delivery and current SPF/DMARC/DKIM/MX state.

Endpoints

URL	Transport	State	Latency	Checked
https://api.mailsecuritytools.com/mcp	streamable-http	answering	90 ms	12 min ago

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Mail Security Tools — questions

Answers built from our own checks of this server.

What can Mail Security Tools do?

It exposes 7 tools, read directly from the server on our last check. Among them: bulk_email_security_score, check_domain_email_security, check_email_address, email_fix_plan, email_security_score, pricing and 1 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Mail Security Tools working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 220 ms. The bar chart above shows every period we have measured.

How do I connect Mail Security Tools?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Mail Security Tools need an API key?

No. Mail Security Tools completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 7 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Mail Security Tools?

It answers our handshake in 220 ms on average, which is faster than 57% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.