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DemiSignal

com.demisignal/mcp · v1.0.0

Check a domain's DMARC, SPF, DKIM, MX, BIMI and MTA-STS records. Generate SPF and DMARC records.

Connect Remote server

Terminal
claude mcp add --transport http mcp https://demisignal.com/mcp?utm_source=mcp-registry
~/.cursor/mcp.json
{
  "mcpServers": {
    "mcp": {
      "url": "https://demisignal.com/mcp?utm_source=mcp-registry"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "mcp": {
      "type": "http",
      "url": "https://demisignal.com/mcp?utm_source=mcp-registry"
    }
  }
}
Claude Desktop
Settings > Connectors > Add custom connector
URL: https://demisignal.com/mcp?utm_source=mcp-registry

Tools 3 found in our last check

  • 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 record, its status and the issues found, with a guide link per issue. A domain checked in the last few minutes is answered from that check (cac…

  • 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's limit of 10. Computes from the arguments only; nothing is looked up or stored.

  • 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 the record does not cover yet. Computes from the arguments only; nothing is looked up or stored.

Details

Endpointhttps://demisignal.com/mcp?utm_source=mcp-registry (Streamable HTTP)
First published14 Oct 2026
Last updated14 Oct 2026
Registry namecom.demisignal/mcp

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