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MCP live MCP 2026-07-28 streamable-http ext: skills

ARC-Relay

com.arc-relay/mcp

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

Watch this dependency Share evidence report
Uptime
100.0%
5 direct probes · 30d
Response
931ms
last probe
Tools
6
callable
Resources
6
readable
Prompts
0
available
Primary URL
https://arc-relay.com/mcp
Score: 100/100
Handshake verified by our own probe.
pass Answers the MCP handshake 50/50
The handshake and the list calls succeeded on the primary URL.
pass Lists tools, resources or prompts 30/30
6 tools, 6 resources, 0 prompts returned.
pass 3 or more catalogue items 10/10
12 items in total; 3 or more earns these points.
pass Describes itself 10/10
98 characters; more than 30 earns these points.

Tools · 6

check_dmarc

Check a domain's DMARC, SPF, and MX records. Use this to diagnose email authentication issues.

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 securi…

check_health

Check ARC-Relay service health and uptime.

check_spf

Validate a domain's SPF record. Shows mechanisms, DNS lookup count, and warns if over the 10-lookup limit.

network_leaderboard

View top relay nodes ranked by reputation score. Filter by region.

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).

Resources · 6

Network Statistics

Public relay network statistics — total nodes, messages routed, delivery rate

arc-relay://network/stats
Node Leaderboard

Top relay nodes ranked by reputation score

arc-relay://network/leaderboard
arc-relay-deliverability-audit

Audit any domain's email authentication posture with ARC-Relay's public DNS tools - DMARC, SPF, MX, DKIM and the 0-100 email health score - then explain the grade and the exact records that fix it. Wo…

skill://arc-relay-deliverability-audit/SKILL.md
dns-records.md skill://arc-relay-domain-setup/references/dns-records.md
arc-relay-domain-setup

Onboard a domain onto ARC-Relay email forwarding end to end - add the domain, publish the MX and TXT verification records, confirm propagation, create forwarding aliases, and optionally enable DKIM si…

skill://arc-relay-domain-setup/SKILL.md
arc-relay-relay-network

Operate on the ARC-Relay decentralized relay network - register and stake SMTP relay nodes, browse, claim and complete routing jobs as an operator, or post routing jobs and fund them with credits as a…

skill://arc-relay-relay-network/SKILL.md

Skills · 3

arc-relay-deliverability-audit

Audit any domain's email authentication posture with ARC-Relay's public DNS tools - DMARC, SPF, MX, DKIM and the 0-100 email health score - then explain the grade and the exact records that fix it. Wo…

skill://arc-relay-deliverability-audit/SKILL.md
1 file
arc-relay-domain-setup

Onboard a domain onto ARC-Relay email forwarding end to end - add the domain, publish the MX and TXT verification records, confirm propagation, create forwarding aliases, and optionally enable DKIM si…

skill://arc-relay-domain-setup/SKILL.md
2 files
arc-relay-relay-network

Operate on the ARC-Relay decentralized relay network - register and stake SMTP relay nodes, browse, claim and complete routing jobs as an operator, or post routing jobs and fund them with credits as a…

skill://arc-relay-relay-network/SKILL.md
1 file

How to use

Claude Desktop or claude.ai: add a custom connector (Customize → Connectors; on Team and Enterprise plans an owner adds it under Organization settings → Connectors) with this server URL: https://arc-relay.com/mcp

Cursor or Cline: add to your MCP config:

{
  "mcpServers": {
    "arc-relay": {
      "url": "https://arc-relay.com/mcp",
      "transport": "streamable-http"
    }
  }
}