DemiSignal
DemiSignal MCP server: check SPF, DKIM and DMARC from your AI assistant
Connect Claude, Cursor or another MCP client to DemiSignal to check a domain's email authentication and build SPF and DMARC records. Free, no account.
Ask your AI assistant to check a domain’s SPF, DKIM and DMARC, or to write the SPF and DMARC records it is missing. Settings → Connectors → Add custom connector. Add it to the client’s MCP settings file: Try: “Check the email authentication for example.com and tell me what to fix first.” Your assistant sends DemiSignal only the domain you ask about, or the options for a record.
Pricing & access
DemiSignal has a free tier, with paid plans unlocking more. Check demisignal.com for current plans.
Frequently asked questions
What is DemiSignal?
DemiSignal is demiSignal MCP server: check SPF, DKIM and DMARC from your AI assistant. Connect Claude, Cursor or another MCP client to DemiSignal to check a domain's email authentication and build SPF and DMARC records. Free, no account.
Is DemiSignal free?
DemiSignal has a free tier, with paid plans unlocking more.
What are the best DemiSignal alternatives?
People comparing DemiSignal also look at Bot403, Cypher eSIM, Reuily, Zalcro. See all options in the Developer Tools category on SiftFox.
Work on DemiSignal?
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