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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

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

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

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

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "email-dns-preflight-x402": {
      "type": "remote",
      "url": "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "email-dns-preflight-x402": {
      "type": "http",
      "url": "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=email-dns-preflight-x402&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vZW1haWwtZG5zLXByZWZsaWdodC14NDAyLmNvcHBlci1jcmF0ZS53b3JrZXJzLmRldi9tY3AifQ%3D%3D"
}

{
  "servers": {
    "email-dns-preflight-x402": {
      "type": "http",
      "url": "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp"
    }
  }
}

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

extensions:
  "email-dns-preflight-x402":
    enabled: true
    name: "email-dns-preflight-x402"
    type: streamable_http
    uri: "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp"
    timeout: 300

Quality 89 / 100good

protocol88 · weight 25

pass
protocol.modernsupports 2026-07-28 (server/discover)
pass
protocol.statelessanswers without a session
pass
protocol.transportstreamable HTTP
warn
protocol.list_ttltools/list declares ttlMs 0, so clients re-fetch it on every use

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 hygiene86 · 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.annotations4 of 4 tools declare readOnlyHint or destructiveHint
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: email_preflight (openWorldHint); domain_email_security (openWorldHint); domain_rdap (openWorldHint); …
pass
tools.token_costabout 415 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

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

4 tools, about 415 tokens to load them all · tool set 498a2584eff6 · checked 2026-10-19 10:52 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

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 79 / 100

no-repository

provenance45

liveness99

freshness100

hygiene80

+website +reachable +uptime-99% +updated-19d-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://email-dns-preflight-x402.copper-crate.workers.dev/mcp` streamable-http	none	yes	99%	288 ms	2026-07-28	2026-10-19

Tools (4)

`domain_email_security`read-only	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`read-only	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`read-only	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`read-only	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.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "io.github.rosarioV25/email-dns-preflight-x402",
  "title": "Email DNS Preflight x402",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://email-dns-preflight-x402.copper-crate.workers.dev/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.1.0",
  "websiteUrl": "https://email-dns-preflight-x402.copper-crate.workers.dev/docs",
  "description": "Paid email, DNS, mail-security and RDAP intelligence for agents over x402."
}