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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 2026-09-15).
Validates an email address by checking syntax, MX records, SPF/DMARC policies, disposability, domain resolution, and role-account detection
Price / call$0.005
Success—
StatusUnknown
How this service works
60 paid endpoints with no metering, no API key and no account. Each endpoint has one flat price per call, whatever the size of the request: LLM completions with automatic failover across several large models, read-only EVM tooling over Base, Ethereum, Polygon, Arbitrum and Optimism, and pure crypto utilities that touch no network.
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
POSThttps://flat-rate-llm.kikoribera03.workers.dev/v1/red/email-checkWhen 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 | |
| string | ||
| hasMx | boolean | |
| domain | string | |
| reasons | array | |
| verdict | string | |
| disposable | boolean | |
| dmarcPolicy | string | |
| roleAccount | boolean | |
| syntaxValid | boolean | |
| domainResolves | boolean |
Tags
x402
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