The DemiSignal MCP server,
connected in one click.
Check a domain's DMARC, SPF, DKIM, MX, BIMI and MTA-STS records. Generate SPF and DMARC records. Connect the official DemiSignal MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add DemiSignal to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http demisignal https://demisignal.com/mcp?utm_source=mcp-registryRun in your terminal, then restart Claude Code.
DemiSignal · https://demisignal.com/mcp?utm_source=mcp-registry
What your AI can do with DemiSignal
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “check_domain”: Look up a domain's live DNS and grade its email authentication: DMARC, SPF, DKIM (common selectors), MX, BIMI and MTA-STS. Returns each reco.”
“Use “generate_spf_record”: Build an SPF TXT record from the services and servers that send email for a domain, with an estimate of the DNS lookups it uses against SPF'.”
“Use “generate_dmarc_record”: Build a DMARC TXT record and the host to publish it at, from a policy and the addresses that should receive aggregate reports. Notes what th.”
How secure is the DemiSignal MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how DemiSignal holds up.
Security grade A
gate scanned 3 tools on Oct 19, 2026 for prompt injection and risky tool definitions — nothing to flag.
Official endpoint
Operated by DemiSignal (demisignal.com) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If DemiSignal adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick DemiSignal
Choose DemiSignal in the gate directory. No sign-in needed.
Use it anywhere
DemiSignal's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools DemiSignal exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
check_domain — Look up a domain's live DNS and grade its email authentication: DMARC, SPF, DKIM (common selectors), MX, BIMI and MTA-STS. Returns each reco
generate_spf_record — Build an SPF TXT record from the services and servers that send email for a domain, with an estimate of the DNS lookups it uses against SPF'
generate_dmarc_record — Build a DMARC TXT record and the host to publish it at, from a policy and the addresses that should receive aggregate reports. Notes what th
Who runs the DemiSignal MCP server?
The DemiSignal MCP server at a glance
https://demisignal.com/mcp?utm_source=mcp-registryQuestions, answered
Is there an official DemiSignal MCP server?
Yes — DemiSignal operates its own remote MCP server at demisignal.com. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect DemiSignal to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick DemiSignal in the directory. No account or sign-in is needed. From then on, DemiSignal's tools are available in every client you've connected to gate.
Do I need to host anything?
No. DemiSignal runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the DemiSignal MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect DemiSignal in minutes. No credit card required.
Connect more than just DemiSignal
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up DemiSignal in: Claude · Claude Code · ChatGPT · Cursor · VS Code