Claude Code isitdns Prompt/dnssec_servfail
How to: Claude Code isitdns dnssec_servfail
Add isitdns to Claude Code
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01
Run this in your project directory.
claude mcp add --transport http isitdns https://isitdns.net/mcp-
02
Restart your session so the server is picked up.
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03
dnssec_servfail is surfaced as a slash command — type / and it is in the list. Unlike a tool, you invoke it deliberately — Claude Code will not call it for you.
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04
If it does not appear, check that isitdns is connected and that you are looking at its prompts rather than its tools.
Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs
Same prompt, other clients
Read from the server itself, by connecting to it and calling prompts/list on 14 November 2026.
A listing does not declare its prompts, so asking is the only way to know them, and this
is what the server actually offers rather than what its listing claims. Names only are
stored; connect the server for each prompt's arguments.