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ARC-Relay

by arc-relay.com · remote · no sign-in to list tools · v1.2.0 · published by com.arc-relay

DMARC-safe email forwarding for agents: aliases, DNS health checks, and MCP tools on your domains.

Changes · 2
CompareRegistry entry

6 tools: 2 change things and 4 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http arc-relay https://arc-relay.com/mcp --header 'Authorization: <your-authorization>'

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

6 tools

Changes things 2Claude Code: ask
  • check_dmarcCheck a domain's DMARC, SPF, and MX records.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Check a domain's DMARC, SPF, and MX records. Use this to diagnose email authentication issues.

    Annotations the server declares

    • title: Check DMARC, SPF and MX
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • check_healthCheck ARC-Relay service health and uptime.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Check ARC-Relay service health and uptime.

    Annotations the server declares

    • title: ARC-Relay service health
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 4Claude Code: allow
  • check_email_healthGet a 0-100 email health score for any domain.No findings

    Why it is in this group

    • The description's first verb is "get": a word for reading.
    Description, as the server wrote it
    Get a 0-100 email health score for any domain. Checks DMARC, SPF, MX, and DKIM records and returns a letter grade (A+ to F) with actionable recommendations. Use this to audit any domain's email security posture.

    Annotations the server declares

    • title: Email health score
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • check_spfValidate a domain's SPF record.No findings

    Why it is in this group

    • The description's first verb is "validate": a word for reading.
    Description, as the server wrote it
    Validate a domain's SPF record. Shows mechanisms, DNS lookup count, and warns if over the 10-lookup limit.

    Annotations the server declares

    • title: Validate SPF record
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • network_leaderboardView top relay nodes ranked by reputation score.No findings

    Why it is in this group

    • The description's first verb is "view": a word for reading.
    Description, as the server wrote it
    View top relay nodes ranked by reputation score. Filter by region.

    Annotations the server declares

    • title: Relay node leaderboard
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • network_statsGet public relay network statistics — total nodes, active nodes, messages routed, delivery rate, and the average DMARC rate nodes report about themselves (rates are null until ther…No findings

    Why it is in this group

    • The description's first verb is "get": a word for reading.
    Description, as the server wrote it
    Get public relay network statistics — total nodes, active nodes, messages routed, delivery rate, and the average DMARC rate nodes report about themselves (rates are null until there is traffic).

    Annotations the server declares

    • title: Relay network stats
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.2.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http arc-relay https://arc-relay.com/mcp --header 'Authorization: <your-authorization>'

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__arc-relay__check_email_health",
      "mcp__arc-relay__check_spf",
      "mcp__arc-relay__network_leaderboard",
      "mcp__arc-relay__network_stats"
    ],
    "ask": [
      "mcp__arc-relay__check_dmarc",
      "mcp__arc-relay__check_health"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as arc-relay. Review it before you use it.