DMARC & DNS MCP Server

DMARC MCP Server and DNS MCP Server provide programmatic access to DMARC analytics, DNS records, and domain monitoring through the Model Context Protocol (MCP). Connect your development tools to access email authentication data programmatically.

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Key Features

The DMARC MCP Server and DNS MCP Server provide comprehensive programmatic access to email authentication data and DNS records through Model Context Protocol endpoints.

DNS Lookup Tool

Comprehensive DNS lookups for A, AAAA, MX, TXT, SPF, DKIM, DMARC, PTR, NS, CNAME, and WHOIS records

DMARC Check Tool

Validates DMARC, SPF, and DKIM DNS records for domains with comprehensive error detection

SPF Check Tool

Validates SPF record syntax, checks DNS lookup count (RFC 7208), and detects circular references

SPF Merge Tool

Merges multiple SPF records or mechanisms into a single optimized record with duplicate removal

Coming Soon
DMARC Reports

Access DMARC aggregate reports programmatically through MCP

Installation Guide

Connect the DMARC and DNS MCP Server to MCP-compatible tools and start accessing DMARC and DNS data programmatically. Full installation instructions are available after signup at https://app.dmarcdkim.com/api-keys/mcp-instructions

Step 1: Create an API Key with MCP Scope

After signing up, create an API key with MCP scope to authenticate your MCP server connection.

Screenshot showing API key creation page with MCP scope selection

Create an API key with MCP scope from your account settings

Step 2: Connect to MCP Clients

Use your API key to connect the DMARC MCP Server to your preferred development tool. We support Claude Code, Cursor (1-click install), VS Code, and other MCP-compatible clients.

Screenshot showing MCP installation instructions for Claude Code, Cursor, and other clients

Full installation instructions are available after signup at app.dmarcdkim.com/api-keys/mcp-instructions

Talk to DMARC Reports via MCP

We're working on bringing DMARC report data directly to your MCP server. Get notified when this feature becomes available.

Access your DMARC aggregate reports programmatically through the Model Context Protocol. This feature will allow you to query report data, analyze email authentication results, and integrate DMARC insights into your development workflow.

MCP Tools & Use Cases

The DMARC MCP Server provides four powerful tools for DNS and email authentication analysis. Learn how each tool works and when to use them.

DNS Lookup Tool

Performs comprehensive DNS lookups for domains and IP addresses with support for all standard and email authentication record types.

Supported Lookup Types:
  • Standard records: A, AAAA, MX, TXT, NS, CNAME
  • Email authentication: SPF, DMARC
  • Reverse DNS: PTR lookups
  • Domain information: WHOIS data
  • Bulk queries: "all" type for multiple records
Use Cases:
  • Verify DNS record configuration
  • Check email server MX records
  • Retrieve SPF and DMARC email authentication records
  • Perform reverse DNS lookups for IP addresses
  • Retrieve domain WHOIS information
Example:
Prompt
Use the DmarcDkim MCP server to check DNS records for example.com. Retrieve A records for IP addresses, MX records for email servers, and SPF and DMARC records for email authentication.
Examplatory Outcome Retrieved A records (192.0.2.1, 192.0.2.2), MX records (mail.example.com priority 10), SPF record (v=spf1 include:_spf.google.com ~all), DMARC record (v=DMARC1; p=none; rua=mailto:dmarc@example.com). All email authentication records retrieved successfully.

DMARC Check Tool

Validates DMARC policy records and SPF records for a domain with comprehensive error detection and reporting. This tool checks the _dmarc subdomain for DMARC policies and validates SPF record configuration.

What It Checks:
  • DMARC policy records from _dmarc subdomain
  • SPF records (TXT records starting with v=spf1)
  • DMARC configuration errors and syntax issues
  • DNS record availability and validity
Use Cases:
  • Verify email authentication DNS setup for a domain
  • Diagnose email delivery issues related to authentication
  • Check if domain is properly configured for DMARC
  • Verify SPF records are present and correctly formatted
  • Get a quick overview of DMARC and SPF status
Example:
Prompt
Use the DmarcDkim MCP server to check DMARC and SPF records for example.com. Verify the email authentication configuration and report any errors or policy issues.
Examplatory Outcome DMARC policy found (v=DMARC1; p=quarantine; rua=mailto:dmarc@example.com), SPF record present (v=spf1 include:_spf.google.com ~all). No configuration errors detected. The domain is properly configured for DMARC enforcement.

SPF Check Tool

Validates SPF record syntax, checks DNS lookup count against RFC 7208 limits, and detects circular references.

Validation Features:
  • Syntax validation and error detection
  • DNS lookup count (RFC 7208 limit: 10 lookups)
  • Circular reference detection in include/redirect chains
  • SPF tree structure parsing with all mechanisms
Use Cases:
  • Validate SPF record before deployment
  • Ensure compliance with RFC 7208 (10 lookup limit)
  • Detect configuration errors that could break email delivery
  • Understand SPF record structure and mechanisms
Example:
Prompt
Use the DmarcDkim MCP server to validate the SPF record for example.com. Check for syntax errors, verify DNS lookup count is ≤10 (RFC 7208 limit), and detect any circular references in include chains.
Examplatory Outcome SPF record found: v=spf1 include:_spf.google.com include:_spf.salesforce.com include:_spf.mailchimp.com ~all. Validation results: 12 DNS lookups required (exceeds RFC 7208 limit of 10 - this will cause email delivery failures). Syntax error detected in include statement: invalid domain format in "include:_spf.mailchimp.com". Circular reference detected in include chain: example.com → other.com → example.com. The SPF tree structure shows the problematic include chain that needs optimization.

SPF Merge Tool

Merges multiple SPF records or mechanisms into a single optimized record with duplicate removal and proper formatting.

Features:
  • Removes duplicate mechanisms
  • Sorts mechanisms by type and qualifier
  • Preserves qualifiers (-, ~, +, ?)
  • Adds recommended "~all" if missing
  • Handles modifiers (redirect, exp)
Use Cases:
  • Consolidate multiple SPF records into one
  • Merge SPF records when migrating email providers
  • Optimize SPF records by removing duplicates
  • Combine existing domain SPF with new mechanisms
Example:
Prompt
Use the DmarcDkim MCP server to merge SPF records. Fetch the existing SPF record from example.com and combine it with ip4:192.168.1.0/24 and include:_spf.newprovider.com. Remove duplicates and create a single optimized record ready for deployment.
Examplatory Outcome Successfully merged SPF records. Original domain SPF: v=spf1 include:_spf.google.com ~all. New mechanisms added: ip4:192.168.1.0/24, include:_spf.newprovider.com. Merged result: v=spf1 include:_spf.google.com include:_spf.newprovider.com ip4:192.168.1.0/24 ~all. Duplicates removed, mechanisms sorted by type, qualifiers preserved, ready for deployment. Note: After deployment, validate the merged record with SPF Check to ensure it complies with RFC 7208 limits.

Tips for Using MCP Tools

Start with DNS Lookup Use this tool to explore what DNS records exist for a domain before running specialized checks
Use DMARC Check for Quick Validation This tool provides a quick overview of DMARC and SPF records in one call
Validate Before Merging Always run SPF Check on merged records to ensure they comply with RFC 7208 limits
Chain Tools Together Use multiple tools in sequence - for example, check DMARC, then validate SPF, then merge if needed

Connect Your Domain

Connect your domain to start using the DMARC MCP Server and DNS MCP Server. Access DMARC analytics, DNS records, and domain monitoring through Model Context Protocol endpoints.

DMARC MCP Server Questions & Answers

The DMARC MCP Server is a Model Context Protocol (MCP) server that provides programmatic access to DNS records and email authentication DNS configurations. This MCP server enables applications and tools to query DNS records, check DMARC policy records, validate SPF configurations, and perform comprehensive DNS lookups through standardized MCP endpoints. Whether you're building integrations with development tools like Claude Code, Cursor, or VS Code, the DMARC MCP Server offers seamless access to DNS and email authentication record checking.

DNS MCP Server is a component of the DMARC MCP Server that provides comprehensive DNS record access. This MCP server enables applications to query DNS records including A, AAAA, MX, TXT, NS, CNAME, PTR, and WHOIS records. It also provides specialized lookups for email authentication records including SPF records and DMARC policy records. The DNS MCP Server offers programmatic DNS record access through Model Context Protocol endpoints.

Model Context Protocol (MCP) is a standardized protocol that enables applications to access contextual data through server endpoints. The DMARC MCP Server and DNS MCP Server implement the MCP protocol to provide programmatic access to DNS records, SPF configurations, DKIM settings, and DMARC policy records. Applications can query these MCP servers using standardized endpoints to retrieve DNS information and validate email authentication configurations.

The DMARC MCP Server provides four powerful tools: (1) DNS Lookup - comprehensive DNS lookups for all record types including email authentication records (SPF, DMARC), (2) DMARC Check - validates DMARC and SPF DNS records for domains with error detection, (3) SPF Check - validates SPF record syntax, checks DNS lookup count against RFC 7208 limits, and detects circular references, and (4) SPF Merge - merges multiple SPF records into a single optimized record. You can integrate the DMARC MCP Server with development tools like Claude Code, Cursor, VS Code, and other MCP-compatible applications.

You can connect to the DMARC MCP Server and DNS MCP Server by configuring your MCP-compatible tool with the appropriate server endpoints. The installation process varies by tool - for Claude Code, you can use the CLI command or manually edit the configuration file. For Cursor, use the 1-click install button. For VS Code and other clients, follow the installation guides provided on this page. After signup, full installation instructions are available at app.dmarcdkim.com/api-keys/mcp-instructions.

MCP server DNS refers to using a Model Context Protocol (MCP) server to access DNS records programmatically. The DNS MCP Server component provides MCP server DNS functionality, enabling applications to query DNS records, SPF configurations, and DMARC policy records through MCP endpoints. This MCP server DNS solution offers a standardized way to access DNS data programmatically for email authentication validation and DNS record checking.

The DMARC MCP Server provides tools to check DMARC DNS policy records and validate SPF configurations. It enables you to programmatically verify email authentication DNS configurations for domains. However, actual DMARC report data and analytics are available through the web dashboard at app.dmarcdkim.com. The MCP server focuses on DNS record checking and validation rather than report analytics.