ARC-Relay Email

com.arc-relay/mcpVersion 1.3.0

Checks any domain's DMARC, SPF, MX and DKIM setup, scores it 0-100, and ranks the fixes.

Status

Responds453 msNov 14, 2026, 13:47 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 13:47 UTC
Latency: 453 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://arc-relay.com/mcpResponds453 msNov 14, 2026, 13:47 UTC

No sign-in

Claude Code

claude mcp add --transport http arc-relay https://arc-relay.com/mcp

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: arc-relay
Remote MCP server URL: https://arc-relay.com/mcp

Cursor

{
  "mcpServers": {
    "arc-relay": {
      "url": "https://arc-relay.com/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"arc-relay","type":"http","url":"https://arc-relay.com/mcp"}'

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Tools

6 tools

Tools of ARC-Relay Email
	Description		Read-only	Idempotent	Open world
`check_dmarc`Check a domain's DMARC, SPF, and MX records. Use this to diagnose email authentication issues.	Check a domain's DMARC, SPF, and MX records. Use this to diagnose email authentication issues.	No	Yes	Yes	Yes
`check_email_health`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.	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.	No	Yes	Yes	Yes
`check_health`Check ARC-Relay service health and uptime.	Check ARC-Relay service health and uptime.	No	Yes	Yes	No
`check_spf`Validate a domain's SPF record. Shows mechanisms, DNS lookup count, and warns if over the 10-lookup limit.	Validate a domain's SPF record. Shows mechanisms, DNS lookup count, and warns if over the 10-lookup limit.	No	Yes	Yes	Yes
`network_leaderboard`View top relay nodes ranked by reputation score. Filter by region.	View top relay nodes ranked by reputation score. Filter by region.	No	Yes	Yes	No
`network_stats`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).	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).	No	Yes	Yes	No

Details

Registry status: Active
Published: Nov 2, 2026
Updated: Nov 2, 2026
Website: https://www.arc-relay.com/⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): SecuritySuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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