DMARC MCP Server

DMARC MCP Server: Questions & Answers

Yes. Once your domain is connected, you can ask your AI in plain language, "summarize last week's DMARC reports", "which senders are failing DMARC", "is it SPF or DKIM?", and it calls the right tools, reads your reports, and explains what to fix. No XML, no dashboard digging.

Every tool needs a sign-in, since the server connects to your account over OAuth, but the lookup tools are free. Once signed in, DNS Lookup, DMARC Check, DKIM Check, SPF Check and SPF Merge run against any domain with no subscription. The account tools (DMARC reports, failing senders, DNS history, change alerts and TLS reports) read your own stored data, so they need a connected domain on a paid plan.

Account tools (after sign-in): list and read DMARC aggregate reports, list per-source report records with SPF/DKIM/DMARC failure filters, list DNS history snapshots, read domain change notifications, and list and read TLS-RPT reports, including raw XML/JSON on request. Free lookup tools (any domain): DNS Lookup across all record types, DMARC Check, DKIM Check (a specific selector), SPF Check (RFC 7208 limits and circular references), and SPF Merge.

Interactive clients authenticate with OAuth, your AI tool gets a scoped token after you authorize it, and you can revoke access at any time. API keys carry the same scope. The server only exposes data for the domains in your own organization.

Any MCP-compatible client. We provide ready-made setup for Claude Code, Codex, Cursor, VS Code and OpenCode, plus a manual config that works with any other MCP client.

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Bastion: External Attack Surface Monitoring](https://app.dmarcdkim.com/mcp-instructions)