Security & Testing

arc-relay.com

Provides email authentication and health checks for domains, including DMARC, SPF, and MX records.

1 endpoint6 known toolsFirst detected May 11, 2026Last detected August 28, 2026

ENDPOINT 1

https://arc-relay.com/mcp

No auth detected

MCP server metadata

Name: arc-relay
Version: 1.2.0

Capabilities

toolsresources

Server instructions

Public DNS/email-health tools work without auth. The tool catalog is filtered by credential: authenticate with an ar_live_ API key (arc-relay.com → Settings → API Keys) to unlock domain, logs, analytics, and relay-network tools. Keys carry scopes (mcp:read, domains:write, domains:admin, network:read, network:operator, network:requester); tools/list shows only what your key allows. Protocol: 2025-03-26 (initialize handshake) or 2026-07-28 (server/discover). Legacy clients need only Authorization. Spec-5 headers (MCP-Protocol-Version, Mcp-Method, Mcp-Name) are optional.

Known tools 6

check_dmarc

Check a domain's DMARC, SPF, and MX records.

Inferred read-only

check_email_health

Get a 0-100 email health score for any domain.

Potential side effects

check_health

Check ARC-Relay service health and uptime.

Inferred read-only

check_spf

Validate a domain's SPF record.

Inferred read-only

network_leaderboard

View top relay nodes ranked by reputation score.

Inferred read-only

network_stats

Get public relay network statistics — total nodes, active nodes, messages routed, delivery rate, DMARC pass rate.

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.arc-relay]
url = "https://arc-relay.com/mcp"
enabled = true

Claude Code

.mcp.json

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

Claude Desktop

Settings → Connectors → Add custom connector

Name: arc-relay
Remote MCP URL: https://arc-relay.com/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

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

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "arc-relay": {
      "type": "http",
      "url": "https://arc-relay.com/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

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

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Trust Data Available

BuiltWith Trust API v2 evidence for arc-relay.com was fetched 2026-07-26T07:30:48.982Z and is being refreshed.

Trust status Neutral

arc-relay.com is assessed as Neutral: No suspicious signals found, but no strong positive signal either

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.