DnsGuard
by dnsguard.mike-tusa.workers.dev · dev.workers.mike-tusa.dnsguard/dnsguard
Check a domain's email authentication: SPF, DKIM, DMARC, BIMI, MX, MTA-STS, TLS-RPT. Score + fixes.
- Category
- Messaging and email
- Connection
- Remote (HTTP)
- Tools
- 1 reported
- Status
- Online
Connect it to your AI
Claude Code
claude mcp add --transport http dnsguard https://dnsguard.mike-tusa.workers.dev/mcpClaude, ChatGPT, Cursor and other apps
Add it as a custom connector with this URL (Streamable HTTP):
https://dnsguard.mike-tusa.workers.dev/mcpThis server expects extra headers, usually an API key from its maker.
Cursor, VS Code and other apps (mcp.json)
{
"mcpServers": {
"dnsguard": {
"url": "https://dnsguard.mike-tusa.workers.dev/mcp"
}
}
}Tools it offers
1 tool, as the server itself reported during our check on Oct 31, 2026.
check_domainAudit the email-authentication DNS records of a domain. Returns a 0–100 score and A–F grade (MX 10, SPF 25, DMARC 30, DKIM 25, BIMI 10, plus up to 5 bonus points for MTA-STS and TLS-RPT, capped at 100), each check's stat
Questions
What is the DnsGuard MCP server?
Check a domain's email authentication: SPF, DKIM, DMARC, BIMI, MX, MTA-STS, TLS-RPT. Score + fixes. It is made by dnsguard.mike-tusa.workers.dev and listed in the official MCP Registry as dev.workers.mike-tusa.dnsguard/dnsguard. MCP (Model Context Protocol) is the open standard that lets AI apps like Claude, ChatGPT and Cursor use outside tools.
How do I add DnsGuard to Claude?
In the Claude app or claude.ai, open Settings, then Connectors, choose "Add custom connector" and paste https://dnsguard.mike-tusa.workers.dev/mcp. In Claude Code, run: claude mcp add --transport http dnsguard https://dnsguard.mike-tusa.workers.dev/mcp
How do I add DnsGuard to ChatGPT?
ChatGPT can use remote MCP servers as connectors. In ChatGPT settings, under Apps and Connectors, turn on developer mode if asked, create a new connector and paste https://dnsguard.mike-tusa.workers.dev/mcp.
How do I add DnsGuard to Cursor?
Open Cursor settings, go to MCP, choose "Add new MCP server" (or edit ~/.cursor/mcp.json) and add: { "mcpServers": { "dnsguard": { "url": "https://dnsguard.mike-tusa.workers.dev/mcp" } } }
Does DnsGuard work right now?
Yes. It responded when we last checked on 31 Oct 2026. We check remote MCP servers every day.
What can DnsGuard do?
It gives your AI 1 tool, including check_domain. The full list is on this page.
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Markdown (GitHub README)
[](https://chen.media/mcp/dev-workers-mike-tusa-dnsguard-dnsguard)HTML (switches to dark mode on its own)
<a href="https://chen.media/mcp/dev-workers-mike-tusa-dnsguard-dnsguard"><picture><source media="(prefers-color-scheme: dark)" srcset="https://chen.media/mcp/badge/dev-workers-mike-tusa-dnsguard-dnsguard.svg?theme=dark"><img src="https://chen.media/mcp/badge/dev-workers-mike-tusa-dnsguard-dnsguard.svg" alt="Listed on chen.media/mcp" height="40"></picture></a>More in Messaging and email
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