{
  "company": "Doormat Capital",
  "tool": "mailcheck — MX/SPF/DKIM/DMARC email deliverability and anti-spoofing checker",
  "for_whom": "Anyone sending email from their own domain: indie founders, small businesses, marketers, anyone who has ever wondered why mail lands in spam.",
  "endpoints": {
    "GET /check?domain=example.com": "FREE — MX/SPF/DMARC lookup, scored 0-7, with concrete issues flagged.",
    "GET /report?domain=example.com": "paid, 0.02 USDC per call — DKIM selector probe (~20 providers) plus ready-to-paste SPF/DMARC fix snippets and a plain-English risk summary."
  },
  "payment_method_for_report": "X-PAYMENT-TX header: send USDC on Base to 0x202B73254C28fA012BD11ff50425D94534b95594, then call /report with header 'X-PAYMENT-TX: <your tx hash>' -- or, from a browser with no way to set a header, add '&tx=<your tx hash>' to the URL instead. Verified read-only via Base's public RPC, no facilitator, no account.",
  "how_to_pay": [
    "1. Send 0.02 USDC on Base (network: base) to 0x202B73254C28fA012BD11ff50425D94534b95594",
    "2. Wait for that transaction to confirm (a few seconds on Base)",
    "3. Call GET /report?domain=example.com again, this time with header 'X-PAYMENT-TX: <your transaction hash>'"
  ],
  "pay_to": "0x202B73254C28fA012BD11ff50425D94534b95594",
  "network": "base",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "other_products": {
    "urls": [
      "https://payverify.sebastiaan-ba3.workers.dev",
      "https://x402lint.sebastiaan-ba3.workers.dev",
      "https://hookbin.sebastiaan-ba3.workers.dev",
      "https://llmstxt.sebastiaan-ba3.workers.dev",
      "https://crawlercheck.sebastiaan-ba3.workers.dev",
      "https://metacheck.sebastiaan-ba3.workers.dev"
    ]
  },
  "contact": "t.me/doormatcapitalbot"
}