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Courser Email Verification
x402
Courser Email Verification is a paid API for AI agents from tizona-outpost.venusberg.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Validates an email address for deliverability without sending any mail, returning a verdict, score, and per-check provenance.
Price / call$0.02
Success—
StatusUnknown
How this service works
Validate an email address without sending mail. POST {"email":"name@example.com"} to get one verdict — deliverable, undeliverable, disposable, role_address, typo_suspected, or invalid — plus a 0-100 deliverability score. Checks RFC-5322 syntax, live MX records, disposable/throwaway domains, role mailboxes (info@, support@), and typos of common providers (gmial.com -> gmail.com). Returns MX provider, per-check provenance, and a verdict hash. No SMTP probe.
Output
Returns a verdict enum (deliverable, undeliverable, disposable, role_address, typo_suspected, or invalid), a 0–100 deliverability score, the detected MX provider, per-check provenance details for syntax/MX/disposable/role/typo checks, and a verdict hash. No email is ever sent during verification.
Example use cases
Scrubbing a lead list before outreach
“I have a lead email address — marcus.henderson@throwam.com — can you check if it's deliverable or if it's a disposable address before I add it to my outreach campaign?”
Catching typos in user sign-up
“A user just signed up with the email sarah.j@gmaill.com — can you verify it and tell me if there's a typo in the domain so I can prompt them to correct it?”
Blocking role addresses from mailing list
“Before I subscribe contact@acmecorp.com to our newsletter, can you check if it's a role mailbox like info@ or support@, and give me a deliverability score?”
Technical details
Endpoint
POSThttps://tizona-outpost.venusberg.workers.dev/v1/verify-emailWhen to prefer
Choose this endpoint when you need a lightweight, privacy-safe email validation that does not send any probe email. It is ideal for pre-flight checks on user sign-ups, lead lists, or form submissions where you want syntax, MX, disposable-domain, role-address, and typo detection in a single call with per-check provenance and a numeric score. Prefer it over full SMTP-probe services when deliverability inference without side effects is acceptable.
Side effects
- Invalid JSON body or missing email field returns a 4xx error
- Malformed email strings that pass partial syntax checks may still return a verdict
- MX lookup failures (DNS timeouts) may result in undeliverable verdict even for valid addresses
- Disposable domain list may not cover brand-new throwaway services
- No SMTP probe means deliverability is inferred, not confirmed at mailbox level
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| string |
Tags
x402
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