SYNTHORA.

POST https://api.hergertsynthora.com/v1/mailcheck ↗

Verify whether an email address is real and safe to send to. Checks RFC syntax, live MX records, catch-all and disposable/temporary domains, role accounts (info@, admin@), free providers and common typos, returning a deliverability status and confidence score. Use it to validate and enrich contacts, clean email lists and prevent bounces. Deterministic, Ed25519-signed. 0.001 USDC on Base. First 3 calls FREE per wallet — send header 'X-WALLET: 0x<your Base address>' (no payment); then per call.

Eligibility: unprobeable
Failures: 0
Last quote: —
Last probe: —

Payment requirements / accepts[] 1 options

State	Network	Scheme	Atomic amount	Asset	payTo / untrusted
active	eip155:8453	exact	50000	0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913	0x10800a5a5B9d72251566EC651E862A8b4B427dE0

All advertised payment options are stored. Base (`eip155:8453`) is the operational network for ranking and canaries; non-Base options remain visible for transparency.

Probe evidence 0 recent

No probe attempts recorded yet. Coverage runs prioritize never-probed endpoints.

Machine contract

Schemas.

InputJSON

{
  "body": {
    "email": "user@example.com"
  },
  "bodyType": "json",
  "method": "POST",
  "type": "http"
}

OutputJSON

{
  "example": {
    "niche": "mailcheck",
    "ok": true,
    "result": {
      "confidence": 90,
      "deliverable_hint": true,
      "email": "user@example.com",
      "mx_found": true,
      "status": "deliverable"
    }
  },
  "type": "json"
}