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is-email-hosted-by-gmx
x402
is-email-hosted-by-gmx is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).
Checks whether a domain's email is hosted by GMX by querying MX records via Cloudflare DoH and matching against GMX mail-exchanger patterns, returning yes/no plus matched hosts.
Price / call$0.01
Success—
StatusUnknown
How this service works
Is the domain's email hosted by gmx? Looks up the MX records (Cloudflare DoH) and matches them against gmx's mail-exchanger patterns, returning yes/no, the MX hosts and which matched. Provider detection for deliverability, sales and migration work. $0.01 per lookup.
Output
Returns a yes/no answer indicating whether the domain's email is hosted by GMX, along with the full list of MX hosts discovered via Cloudflare DNS-over-HTTPS and the specific MX records that matched GMX's known mail-exchanger patterns.
Example use cases
Sales lead email provider qualification
“Before I reach out to these prospects, can you check if acmecorp.com uses GMX for their email? I want to tailor my pitch based on their current provider.”
Pre-migration provider audit
“We're planning to migrate clients off GMX to a new platform — can you confirm whether clientdomain.de is still hosted by GMX so we know who needs migrating?”
Deliverability pre-flight check
“I'm about to send a bulk campaign and want to flag any recipient domains running on GMX since their filters behave differently — can you tell me if newsletter-readers.com is a GMX-hosted domain?”
Technical details
Endpoint
GEThttps://email.intel.rallylive.ca/email/hosted-by/gmx?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, definitive yes/no on whether a specific domain uses GMX as its email host, particularly for sales prospecting, deliverability segmentation, or migration planning. Prefer the single-lookup version (this endpoint) for one-off checks or when building a watch/alert workflow; use the bulk variant for batch processing multiple domains at once. This endpoint is ideal when you need the raw MX host data alongside the provider match result.
Side effects
- Domain does not exist or has no MX records — returns no match with empty host list
- DNS lookup timeout via Cloudflare DoH — returns an error or no result
- Domain has MX records but none match GMX patterns — returns no with full MX list
- Invalid or malformed domain input — returns validation error
- Transient network failure reaching Cloudflare DoH — may return error or retry needed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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