DMARC MCP Server is a Model Context Protocol server that exposes DNS and email authentication data as structured, read only tools for developers and AI agents. It enables direct inspection and validation of DMARC, SPF, and DKIM records, including RFC compliant SPF analysis, lookup limit checks, and configuration diagnostics. The server integrates with MCP compatible tools like Cursor, VS Code, and Claude Code, making email authentication part of modern development and automation workflows.