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Email Domain MX & Disposable Check
x402
Email Domain MX & Disposable Check is a paid API for AI agents from email-verify-api-production-d262.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-16).
Checks whether a domain has valid MX records, is not on the disposable email provider list, and reports if it is a free provider.
Price / call$0.001
Success—
StatusUnknown
How this service works
Check whether a domain has valid MX records and is not on the disposable list; also reports free-provider.
Output
Returns whether the domain has valid MX records, whether it appears on a disposable email provider list, and whether it is associated with a free email provider — allowing callers to assess the legitimacy and deliverability of the domain.
Example use cases
SaaS signup fraud prevention
“Before I activate this new user account, check if their domain fastmailtemp.com is a disposable email provider or has valid MX records — I want to block throwaway signups.”
B2B outreach lead screening
“I'm about to send a cold email campaign to a list of domains — can you check if clientdomain.io has working MX records and isn't a free or disposable provider so I know it's worth targeting?”
CRM data hygiene audit
“We imported a bunch of company domains and I need to clean them up — can you verify whether businesspartner.net has valid MX records and flag it if it's a free email provider?”
Technical details
Endpoint
POSThttps://email-verify-api-production-d262.up.railway.app/domain-checkWhen to prefer
Use this endpoint when you only need domain-level checks (MX validity, disposable, free provider) without performing a full SMTP probe or verifying a specific email address. It is faster and cheaper than a full email verification when you just need to screen domains in bulk or validate infrastructure before investing in per-address checks.
Side effects
- Domain does not exist or has no DNS records — returns invalid MX status
- Disposable list may not cover newly created throwaway domains
- Network timeout during MX DNS lookup
- Invalid input format (non-string or malformed domain) returns error
- Ambiguous domains that are both free and business-oriented may be misclassified
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string | Domain to check for valid MX records and disposable status, e.g. 'acme.com'. |
Tags
x402
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