DemiSignal
Check a domain's DMARC, SPF, DKIM, MX, BIMI and MTA-STS records. Generate SPF and DMARC records.
Connect it
Settings → Connectors → Add custom connector
URL: https://demisignal.com/mcp?utm_source=mcp-registrySettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://demisignal.com/mcp?utm_source=mcp-registry{
"mcpServers": {
"mcp": {
"url": "https://demisignal.com/mcp?utm_source=mcp-registry"
}
}
}claude mcp add --transport http mcp https://demisignal.com/mcp?utm_source=mcp-registry{
"servers": {
"mcp": {
"type": "http",
"url": "https://demisignal.com/mcp?utm_source=mcp-registry"
}
}
}3 tools, verified live
check_domainread-onlyLook 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.
generate_spf_recordread-onlyBuild 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_recordread-onlyBuild 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.
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