Email Address Validator

x402

Email Address Validator is a paid API for AI agents from flat-rate-llm.kikoribera03.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-31).

Validates an email address by checking syntax, MX records, SPF/DMARC policies, disposability, domain resolution, and role-account detection

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Use when an agent must decide whether to write to an address, or clean a list before sending: it scores one email 0-100 with a verdict (ok, risky, disposable, undeliverable, invalid) and the evidence under it: every point lost is itemised with the field that proves it. 12,141 disposable domains from two maintained open lists pinned to a commit, 4,897 free providers, 1,018 role names, typo fix (gmial.com > gmail.com), live MX/SPF/DMARC. No SMTP probe, no API key.

Output

Returns a JSON object with: the original email and parsed domain, a boolean syntaxValid, booleans hasMx and domainResolves, the raw SPF record string, dmarcPolicy string, a disposable boolean indicating throwaway services, a roleAccount boolean for generic addresses like info@ or admin@, an array of MX records with priority and exchange, an array of reasons explaining any issues, and a final verdict string summarizing deliverability.

Example use cases

Signup form email screening

“Before we add this new user to our list, check if the email they signed up with — noreply@guerrillamail.com — is disposable, a role account, or has no real MX records so we can decide whether to reject it.”

Pre-send deliverability check

“I'm about to send a marketing campaign to a list that includes user@businessdomain.io — can you verify that the domain resolves, has MX records, and has a DMARC policy before I hit send?”

Lead quality validation

“We just got a sales lead with the email address sales@acme-corp.net — can you tell me if it's syntactically valid, whether the domain actually resolves, and whether it's a generic role account rather than a real person?”

Technical details

Endpoint

GEThttps://flat-rate-llm.kikoribera03.workers.dev/v1/red/email-check?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a comprehensive, multi-signal email validation in a single flat-rate call — covering syntax, DNS/MX resolution, SPF, DMARC, disposability, and role-account detection — without managing API keys or per-character metering. Prefer it over basic regex checks when deliverability and lead quality matter, or over heavier email verification SaaS when you want predictable $0.005 per-call pricing with no subscription.

Side effects

Missing or malformed email field returns a 400-level error
DNS lookup timeouts for obscure or slow domains may cause delays or partial results
Disposable email database may not cover newly created throwaway domains
Valid-looking but non-existent addresses may pass syntax checks but fail MX resolution
Payment failure or insufficient USDC balance prevents the call from completing

Input

Schema · Request body

Field	Type	Description
emailrequired	string	The address to check, e.g. someone@example.com.

Output

Schema · Response

Field	Type	Description
mx	array
spf	string
email	string
hasMx	boolean
domain	string
reasons	array
verdict	string
disposable	boolean
dmarcPolicy	string
roleAccount	boolean
syntaxValid	boolean
domainResolves	boolean

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