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FiatDock Email Validation
x402
FiatDock Email Validation is a paid API for AI agents from fiatdock.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-10).
Validates an email address by checking syntax, DNS (MX/A/AAAA records), disposable provider lists, role-mailbox detection, typo suggestions, and returns a risk verdict — without SMTP probing.
Price / call$0.001
Success—
StatusUnknown
How this service works
Is this email address worth sending to? Syntax, domain DNS (MX, then A/AAAA), disposable/role/free-provider lists, a typo suggestion (gmial.com -> gmail.com), a normalized form and a risk verdict with reasons. No SMTP probe: it vouches for the domain, never the mailbox. An invalid address is a paid verdict; a DNS failure is 502, not charged. Pay-per-call via x402. An empty body is answered for the published example address (name@example.com); send {"email":"…"} for any other address.
Output
Returns syntax validity, DNS check results (MX then A/AAAA fallback), whether the address is from a known disposable provider, whether it is a role mailbox (e.g. info@, admin@), a free-provider flag, a typo suggestion if the domain looks misspelled, the normalized canonical form of the email, and an overall risk verdict with enumerated reasons. Does not perform SMTP verification — domain deliverability is vouched for, individual mailbox existence is not. An invalid address counts as a paid verdict; a DNS failure returns HTTP 502 and is not charged.
Example use cases
Pre-send list hygiene check
“Before I import these leads into my CRM, can you check if 'marketing@tempinbox.net' is a real deliverable address or just a throwaway — flag if it's disposable, a role mailbox, or has no valid MX records?”
Signup form typo correction
“A user just entered 'alice@yahooo.com' on our signup form — can you validate it, suggest the correct spelling if it looks like a typo, and tell me if it's safe to send a welcome email to?”
Email risk scoring for fraud prevention
“I need a risk verdict on 'noreply@guerrillamail.com' — is it a disposable address, does the domain resolve properly, and what are the reasons it might be risky to accept?”
Technical details
Endpoint
GEThttps://fiatdock.com/v1/email/check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need fast, lightweight email address validation that goes beyond syntax checks — covering DNS/MX records, disposable providers, role addresses, free-provider classification, and typo correction — without the latency or deliverability risk of an SMTP probe. Prefer it when you want a risk verdict with reasons rather than a simple boolean, and when pay-per-call pricing ($0.001 USDC) over x402 fits your agent's cost model. It is well-suited for pre-import list hygiene, signup form validation, or fraud screening where domain-level assurance is sufficient.
Side effects
- 502 returned when DNS lookup fails — this call is not charged
- Malformed or missing 'email' field in request body results in a validation error
- No SMTP probe means a syntactically valid address on a valid domain may still bounce if the mailbox does not exist
- Disposable provider lists may not cover all newly created throwaway domains
- Typo suggestions are heuristic and may occasionally suggest incorrect corrections
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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