Connect

8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "arc-relay": {
      "type": "http",
      "url": "https://arc-relay.com/mcp",
      "headers": {
        "Authorization": "Bearer ${ARC_RELAY_TOKEN}"
      }
    }
  }
}

claude mcp add --transport http arc-relay https://arc-relay.com/mcp --header "Authorization: Bearer ${ARC_RELAY_TOKEN}"

[mcp_servers.arc-relay]
url = "https://arc-relay.com/mcp"
bearer_token_env_var = "ARC_RELAY_TOKEN"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "arc-relay": {
      "type": "remote",
      "url": "https://arc-relay.com/mcp",
      "enabled": true,
      "headers": {
        "Authorization": "Bearer {env:ARC_RELAY_TOKEN}"
      }
    }
  }
}

{
  "mcpServers": {
    "arc-relay": {
      "type": "http",
      "url": "https://arc-relay.com/mcp",
      "headers": {
        "Authorization": "Bearer ${ARC_RELAY_TOKEN}"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=arc-relay&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vYXJjLXJlbGF5LmNvbS9tY3AiLCJoZWFkZXJzIjp7IkF1dGhvcml6YXRpb24iOiJCZWFyZXIgJHtBUkNfUkVMQVlfVE9LRU59In19"
}

{
  "servers": {
    "arc-relay": {
      "type": "http",
      "url": "https://arc-relay.com/mcp",
      "headers": {
        "Authorization": "Bearer ${ARC_RELAY_TOKEN}"
      }
    }
  }
}

{
  "mcpServers": {
    "arc-relay": {
      "httpUrl": "https://arc-relay.com/mcp",
      "headers": {
        "Authorization": "Bearer ${ARC_RELAY_TOKEN}"
      }
    }
  }
}

extensions:
  "arc-relay":
    enabled: true
    name: "arc-relay"
    type: streamable_http
    uri: "https://arc-relay.com/mcp"
    headers:
      "Authorization": "Bearer ${ARC_RELAY_TOKEN}"
    timeout: 300

Placeholders to fill from your own secret store: ${ARC_RELAY_TOKEN}. The registry never accepts secret values.

Quality 84 / 100good

protocol100 · weight 25

pass
protocol.modernsupports 2026-07-28 (server/discover)
pass
protocol.statelessanswers without a session
pass
protocol.transportstreamable HTTP
pass
protocol.list_ttltool list is cacheable (ttlMs 3600000)

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene100 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations6 of 6 tools declare readOnlyHint or destructiveHint
pass
tools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
pass
tools.token_costabout 548 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability25 · weight 15

warn
stability.changes6 tool changes in 30 days
fail
stability.rug_pull1 tools kept their name but changed most of their description in 30 days; review before trusting them

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

6 tools, about 548 tokens to load them all · tool set 273c1515ada2 · tools last changed 2026-10-04 · checked 2026-10-20 14:54 UTC

Tool changes

2026-10-04network_statschangeddescription, annotationsmeaning changed
before
Get public relay network statistics — total nodes, active nodes, messages routed, delivery rate, DMARC pass rate.
after · 48% of words in common
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).
2026-10-04network_leaderboardchangedannotations
2026-10-04check_spfchangedannotations
2026-10-04check_healthchangedannotations
2026-10-04check_email_healthchangedannotations
2026-10-04check_dmarcchangedannotations

Full history: list_changes · trend: quality JSON.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 80 / 100

no-repository

provenance55

liveness100

freshness85

hygiene80

+dns-namespace +website +reachable +uptime-100% ~updated-53d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://arc-relay.com/mcp` streamable-http	api_key `${ARC_RELAY_TOKEN}`	yes	100%	247 ms	2025-03-26, 2025-11-25, 2026-07-28, 2024-11-05	2026-10-20

Tools (6)

`check_dmarc`read-only	Check a domain's DMARC, SPF, and MX records. Use this to diagnose email authentication issues.
`check_email_health`read-only	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.
`check_health`read-only	Check ARC-Relay service health and uptime.
`check_spf`read-only	Validate a domain's SPF record. Shows mechanisms, DNS lookup count, and warns if over the 10-lookup limit.
`network_leaderboard`read-only	View top relay nodes ranked by reputation score. Filter by region.
`network_stats`read-only	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).

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "com.arc-relay/mcp",
  "title": "ARC-Relay",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://arc-relay.com/mcp",
      "type": "streamable-http",
      "headers": [
        {
          "name": "Authorization",
          "isSecret": true,
          "isRequired": true,
          "description": "Bearer ar_agent_... from POST https://arc-relay.com/api/v1/agents/register"
        }
      ]
    }
  ],
  "version": "1.2.0",
  "websiteUrl": "https://www.arc-relay.com",
  "description": "DMARC-safe email forwarding for agents: aliases, DNS health checks, and MCP tools on your domains."
}