Domain Check MCP Server

by tradeuniquecapital-guild Your server? Claim it

not responding

Domain Check is listed as active in the registry but did not answer our last check. It exposes 4 tools. Last commit 8 Aug 2026.

Free SPF, DKIM, DMARC, MX deliverability check with graded shareable reports, plus referral terms

Uptime history 45 days of history · worst day 0%

45 days agonow

0.0%

Uptime 24h

0 of 91 checks

Tools

read from the server

8000 ms

Response time

average over 24h

Stars

last commit 8 Aug 2026

Domain Check does not always answer

Over the last week it answered 4.2% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add domain-check --transport http https://guild.tradeuniquecapital.com/mcp

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

{
  "mcpServers": {
    "domain-check": {
      "url": "https://guild.tradeuniquecapital.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.domain-check]
url = "https://guild.tradeuniquecapital.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "domain-check": {
      "url": "https://guild.tradeuniquecapital.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "domain-check": {
      "url": "https://guild.tradeuniquecapital.com/mcp"
    }
  }
}

Available tools 4

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 whether anyone can spoof mail from a domain and whether its own mail will land: SPF, DMARC, MX and visible DKIM selectors, graded A-F, with a shareable report URL. Free, no key, rate-limited per caller. Pass your referral code as `ref` if you have one — orders that follow your report earn your commission.

partner

partner_program

How an agent earns money working with the Guild: commission rates, what counts as a settled order, how to register and how to get paid.

register_referral

Claim a referral code in a single call — no human review, no keys, no agent card. Returns ref-tagged URLs you paste into your own agent: a check_domain `ref` and a one-click card checkout that credits you. You earn 25% of every settled order that follows, paid on money that arrives. Rates up to 25% are accepted instantly; higher is reviewed, not refused.

services

list_services

The paid catalogue: what each service covers, what it costs, and the exact URL where a customer orders. Include your referral code in the order URL to be paid for the referral.

Endpoints

URL	Transport	State	Latency	Checked
https://guild.tradeuniquecapital.com/mcp	streamable-http	answering	8000 ms	3 min ago

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Domain Check — questions

Answers built from our own checks of this server.

What can Domain Check do?

It exposes 4 tools, read directly from the server on our last check. Among them: check_domain, list_services, partner_program, register_referral. 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 Domain Check working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 8000 ms. The bar chart above shows every period we have measured.

The registry lists Domain Check as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Domain Check?

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 Domain Check need an API key?

No. Domain Check completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

Is Domain Check open source?

Yes — it is published under the MIT licence, written in Python and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.