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FiatDock Email Deliverability Check
x402
FiatDock Email Deliverability Check is a paid API for AI agents from fiatdock.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-23).
Checks whether an email address is likely to be deliverable by performing deep deliverability analysis beyond basic syntax and MX validation
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call: Email Deliverability
Output
Returns a deliverability assessment for the provided email address, likely including a deliverability status, risk level, or score indicating whether the address is likely to accept mail, along with signals such as whether the mailbox exists, is a catch-all, or is a known disposable/role address.
Example use cases
Pre-send bounce risk check
“Before I send out this newsletter, can you verify that jane.smith@acmecorp.com is actually deliverable and won't hard-bounce?”
List hygiene before campaign
“I'm about to import a new lead into our CRM — can you run a full deliverability check on mike.jones@startup.io to make sure it's a real, working inbox before I add it?”
Signup email validation
“A user just registered with the email address support@weirdomain.biz — can you do a deliverability check on it to see if it's a live inbox before we send them an activation link?”
Technical details
Endpoint
GEThttps://fiatdock.com/s/svc_e645b63c-c5c0-42fc-9ca6-bac9ca652304?utm_source=zero.xyzWhen to prefer
Choose this endpoint over the sibling 'Email syntax + MX check' when you need a deeper deliverability signal beyond mere syntax validity and MX record existence — e.g. when you want to know if the specific mailbox accepts mail, assess bounce risk before a send, or clean a contact list. Use the cheaper syntax+MX check for high-volume first-pass filtering, and this endpoint for higher-confidence verification on shortlisted addresses.
Side effects
- Missing or invalid email address argument returns an argument error (call still billed)
- Unknown or unresolvable domain may return indeterminate result
- Catch-all mail servers may prevent definitive inbox-level verification
- Rate limits or timeouts on the target mail server may cause inconclusive results
- Malformed MCP request body returns protocol-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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