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Agent Toolbox Email Verifier
x402
Agent Toolbox Email Verifier is a paid API for AI agents from agent-toolbox.zafermemon87.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-30).
Validates an email address by checking format, domain existence, MX records, and classifying it as valid, risky, or invalid without probing the mailbox.
Price / call$0.002
Success—
StatusUnknown
How this service works
Check an email address: format, whether the domain exists and accepts mail (MX records), disposable providers, role accounts and free providers, with a valid / risky / invalid verdict. The mailbox itself is not probed.
Output
Returns a structured verdict (valid, risky, or invalid) along with individual flags indicating whether the email format is correct, whether the domain exists and has valid MX records, whether the provider is disposable, whether the address is a role account (e.g. info@, support@), and whether it belongs to a free email provider. The mailbox itself is not probed.
Example use cases
Filter disposable signups at registration
“Before I add this new user to my database, check if their email address throwaway123@guerrillamail.com is from a disposable provider or is otherwise risky — I don't want fake accounts.”
Pre-send campaign list scrub
“I have an email I want to send to contact@somestartup.io — can you verify that domain has working MX records and the address looks legitimate before I add it to my mailing list?”
Detect role accounts in B2B outreach
“I'm about to reach out to sales@bigcorp.com — can you tell me if that's a role account and whether it's likely to be a valid deliverable address?”
Technical details
Endpoint
GEThttps://agent-toolbox.zafermemon87.workers.dev/v1/email-verify?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, non-intrusive email quality check that goes beyond simple regex validation — especially to catch disposable, role, or free-provider addresses before adding them to a list or database. Prefer this over full SMTP probing when you cannot or do not want to make live mailbox connections, or when you need a simple valid/risky/invalid verdict for gating logic.
Side effects
- Malformed or missing email query parameter returns an error
- Domain exists but has no MX records, flagged as invalid
- Newly registered disposable domain not yet in blocklist may pass as valid
- Network issues resolving DNS may cause transient failures
- Very new legitimate domains may be incorrectly flagged as suspicious
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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