Email DNS Preflight x402 MCP Server

by rosariov25 Your server? Claim it

answering

Email DNS Preflight x402 is answering right now. Last checked 10 min ago. It exposes 4 tools.

Paid email, DNS, mail-security and RDAP intelligence for agents over x402.

Uptime history 12 days of history · worst day 96%

12 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

137 ms

Response time

average over 24h

open, no key

Access

streamable-http

Email DNS Preflight x402 missed 3 checks this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add email-dns-preflight-x402 --transport http https://email-dns-preflight-x402.copper-crate.workers.dev/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "email-dns-preflight-x402": {
      "url": "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.email-dns-preflight-x402]
url = "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "email-dns-preflight-x402": {
      "url": "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "email-dns-preflight-x402": {
      "url": "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

domain

domain_email_security

Focused SPF/DMARC/DKIM/BIMI diagnostics with bounded recursive SPF lookup analysis, CAA/DNSSEC context and deterministic fixes. Costs $0.001 native USDC on Base.

domain_preflight

Inspect DNS records, CAA, SPF/DMARC/DKIM/BIMI, DNSSEC, RDAP age/expiry, registrar-lock and nameserver-redundancy posture. Costs $0.001 native USDC on Base.

domain_rdap

Privacy-safe RDAP/WHOIS-successor lookup for domain age, expiry, registrar, statuses, nameservers and DNSSEC delegation. Costs $0.001 native USDC on Base.

email_preflight

Validate practical email syntax and inspect DNS, mail routing, authentication and domain-security posture. DNS-level only; no SMTP mailbox-existence claim. Costs $0.001 native USDC on Base.

Endpoints

URL	Transport	State	Latency	Checked
https://email-dns-preflight-x402.copper-crate.workers.dev/mcp	streamable-http	answering	132 ms	10 min ago

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Email DNS Preflight x402 — questions

Answers built from our own checks of this server.

What can Email DNS Preflight x402 do?

It exposes 4 tools, read directly from the server on our last check. Among them: domain_email_security, domain_preflight, domain_rdap, email_preflight. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Email DNS Preflight x402 working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 137 ms. The bar chart above shows every period we have measured.

How do I connect Email DNS Preflight x402?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Email DNS Preflight x402 need an API key?

No. Email DNS Preflight x402 completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Email DNS Preflight x402?

It answers our handshake in 137 ms on average, which is faster than 74% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.