ARC-Relay Email is an MCP server with 6 tools an agent can call, among them check_dmarc, check_email_health, check_health. It answers at https://arc-relay.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 10 of 10 times since 4 September 2026; the last check, on 17 October 2026, succeeded.
DMARC-safe email forwarding for agents: aliases, DNS health checks, and MCP tools on your domains.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
check_dmarc | Check a domain's DMARC, SPF, and MX records. Use this to diagnose email authentication issues. Inputs: domain |
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. Inputs: domain |
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. Inputs: domain |
network_leaderboard | View top relay nodes ranked by reputation score. Filter by region. Inputs: region, limit |
network_stats | Get public relay network statistics — total nodes, active nodes, messages routed, delivery rate, DMARC pass rate. |
Every block below points at https://arc-relay.com/mcp. Pick your client and copy.
claude mcp add --transport http arc-relay-email https://arc-relay.com/mcp
{
"mcpServers": {
"arc-relay-email": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://arc-relay.com/mcp"]
}
}
}{
"mcpServers": {
"arc-relay-email": {
"url": "https://arc-relay.com/mcp"
}
}
}{
"servers": {
"arc-relay-email": {
"type": "http",
"url": "https://arc-relay.com/mcp"
}
}
}{
"context_servers": {
"arc-relay-email": {
"url": "https://arc-relay.com/mcp"
}
}
}{
"mcpServers": {
"arc-relay-email": {
"serverUrl": "https://arc-relay.com/mcp"
}
}
}{
"mcpServers": {
"arc-relay-email": {
"url": "https://arc-relay.com/mcp"
}
}
}name: ARC-Relay Email
version: 0.0.1
schema: v1
mcpServers:
- name: ARC-Relay Email
type: streamable-http
url: https://arc-relay.com/mcp{
"mcpServers": {
"arc-relay-email": {
"httpUrl": "https://arc-relay.com/mcp"
}
}
}{
"mcpServers": {
"arc-relay-email": {
"type": "http",
"url": "https://arc-relay.com/mcp"
}
}
}{
"mcpServers": {
"arc-relay-email": {
"url": "https://arc-relay.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Farc-relay.com%2Fmcp&type=streamable_http&id=arc-relay-email&name=ARC-Relay%20Email
It answered our last check on 17 October 2026 in 452 ms. Over 10 checks since 4 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by arc-relay.com and served from arc-relay.com, the vendor's own domain: https://arc-relay.com/mcp.
6, as returned by the server's own tools/list on 10 September 2026: check_dmarc, check_email_health, check_health, check_spf, network_leaderboard, network_stats.
It answered our last check on 17 October 2026 in 452 ms. Over 10 checks since 4 September 2026 it answered 10.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://arc-relay.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: com.arc-relay. Endpoint host: arc-relay.com. ARD identifier: urn:air:com.arc-relay:mcp:mcp.
First indexed 31 August 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.