DemiSignal MCP server

MCP server for checking a domain's SPF, DKIM and DMARC records and generating SPF and DMARC records from an AI assistant.

Visit demisignal.com →Pricing

A remote MCP server over streamable HTTP at https://demisignal.com/mcp that connects MCP clients such as Claude, Claude Code, Cursor, Windsurf and VS Code to DemiSignal's email authentication tools. It exposes three read-only tools: check_domain (reads DMARC, SPF, DKIM, MX, BIMI and MTA-STS records from public DNS and grades them), generate_spf_record (builds an SPF record with an estimate against the 10 DNS lookup limit), and generate_dmarc_record (builds a DMARC record from a policy and reporting addresses). Free with no account or API key required; an optional free API key provides 100 new checks per month. A JSON HTTP API for the domain check is also available.

Category: MCP servers
Pricing: freemium
Free tier: yes
API: yes
MCP server: yes
SDK: no
Open source: no

#mcp #email #dns #spf #dkim #dmarc #domain-checking

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Listed 2026-10-29 · last verified 2026-10-29 · extracted by @cf/zai-org/glm-5.3-flash · confidence 0.9

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