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Email Verification API – Deliverability & Flags
x402
Email Verification API – Deliverability & Flags is a paid API for AI agents from api.webbersites.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Verifies an email address for deliverability via syntax check, MX lookup, disposable-domain detection, role-account and free-provider flags, plus-tag normalization, and a final verdict.
Price / call$0.002
Success—
StatusUnknown
How this service works
Email verification for outreach and CRM agents: syntax validation, MX lookup with implicit-MX fallback, disposable-domain detection, role-account and free-provider flags, plus-tag normalization, and a deliverability verdict. No signup, no external services.
Output
Returns the original email, normalized form (plus-tag stripped), syntax validity, MX/domain check details, boolean flags for disposable domain, role account, and free provider, plus an overall deliverability verdict string.
Example use cases
Clean outreach list before sending
“I have a list of email addresses I'm about to use for a cold outreach campaign — can you go through each one and flag any that are disposable, role accounts, or have bad MX records so I can remove them before we start sending?”
Validate email before CRM entry
“Before I add this new lead's email, support+tickets@gmail.com, to our CRM, can you verify it's actually deliverable, tell me if it's a role account or free provider, and give me the clean normalized version to store?”
Detect throwaway signup emails
“A new user just signed up with the email trashbox123@guerrillamail.com — can you check if it's a disposable or throwaway address so I can decide whether to let them access the platform or prompt them for a real email?”
Technical details
Endpoint
GEThttps://api.webbersites.com/api/email/verifyWhen to prefer
Use this endpoint when you need a no-signup, self-contained email validation check that combines syntax, MX lookup, disposable detection, role-account flagging, free-provider detection, and plus-tag normalization in a single call — especially for pre-CRM ingestion, outreach list cleaning, or real-time form validation without integrating a heavyweight third-party email validation service.
Side effects
- Missing email query parameter — returns error indicating required field
- Invalid or malformed email string — syntax check fails with details
- Domain has no MX records and no implicit-MX fallback — verdict returns undeliverable
- Rate limit or quota exceeded — returns 402 or 429 status
- Network timeout reaching the API — no response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"email": "jane.doe+news@gmail.com",
"flags": {
"plus_tag": true,
"disposable": false,
"role_account": false,
"free_provider": true
},
"syntax": {
"valid": true
},
"verdict": "deliverable_domain",
"normalized": "janedoe@gmail.com",
"domain_check": {
"mx_found": true
}
}
}Tags
x402
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