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DomainCheck MCP Server

answering

DomainCheck is answering right now. Last checked 10 min ago. It exposes 2 tools.

Domain and email trust checks for agents: DNS, SPF/DMARC, disposable email. By Crypto Money Maker

Uptime history 4 days of history
4 days agonow
100.0%
Uptime 24h
91 of 91 checks
2
Tools
read from the server
74 ms
Response time
average over 24h
open, no key
Access
streamable-http

Nothing serious here today

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

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.

run in your terminal
claude mcp add domaincheck --transport http https://api.youraitools.co/domaincheck/mcp
Settings → Connectors → Add custom connector, then paste this address
https://api.youraitools.co/domaincheck/mcp
~/.codex/config.toml
[mcp_servers.domaincheck]
url = "https://api.youraitools.co/domaincheck/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "domaincheck": {
      "url": "https://api.youraitools.co/domaincheck/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "domaincheck": {
      "type": "http",
      "url": "https://api.youraitools.co/domaincheck/mcp"
    }
  }
}

Available tools 2

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

domain
check_domain
Check a domain before your agent trusts a link, a sender or a counterparty: does it exist, where does its mail go, SPF and DMARC policy, nameservers, DNSSEC. Free tier (preview). For registration age, registrar, parking detection and a 0-100 risk score use the paid x402 endpoint /v1/domain.
email
check_email
Check an email address an agent is about to store, email or trust: syntax, disposable / throwaway provider, role account, free webmail. Free tier (no network). For MX, mail auth, domain age and a verdict (valid | risky | undeliverable) use the paid x402 endpoint /v1/email.

Endpoints

URLTransportStateLatencyChecked
https://api.youraitools.co/domaincheck/mcp streamable-http answering 76 ms 10 min ago

Alternatives to DomainCheck

same job, measured the same way
E
Email Auth Checker
by workers-quietworklabs-email-auth-check

SPF, DKIM, DMARC, MTA-STS and domain-expiry checks for any domain, with SPF lookup counts.

4 tools answering
Isitdisposable MCP
by richelo

An MCP server that lets AI agents check whether an email address or domain is disposable.

10 installs/wk local only
ARC-Relay
by arc-relay

DMARC-safe email forwarding for agents: aliases, DNS health checks, and MCP tools on your domains.

6 tools answering
F
fixture.email — Email Testing for Agents
by fixture

Disposable test mailboxes on a real domain: send, receive and assert on real email.

answering
Email Validator (MX, Disposable, Typo)
by fairquery

Validate emails without sending mail: syntax, MX, disposable, role and typo checks, SPF/DMARC.

answering
D
Disposable Email Checker
by workers-ara-v1-disposable-email-mcp

Checks if an email/domain is disposable (temp-mail). x402-metered per call.

1 tools answering
Email Verifier
by pavel-tashev

Verify email addresses in bulk: syntax, domain, MX, disposable and role addresses, SPF and DMARC

answering
MAILTYPE — Email Domain Capability Intelligence
by gsterlingpress

Email-domain intelligence: MX capability, provider, disposable status, SPF, DMARC, and MTA-STS.

answering

DomainCheck — questions

Answers built from our own checks of this server.

What can DomainCheck do?
It exposes 2 tools, read directly from the server on our last check. Among them: check_domain, check_email. 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 DomainCheck working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 74 ms. The bar chart above shows every period we have measured.
How do I connect DomainCheck?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does DomainCheck need an API key?
No. DomainCheck completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is DomainCheck?
It answers our handshake in 74 ms on average, which is faster than 98% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.