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Is Email Hosted by Proton Mail
x402
Is Email Hosted by Proton Mail is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-24).
Checks whether a domain's email is hosted by Proton Mail by looking up its MX records via Cloudflare DoH and matching against Proton Mail's mail-exchanger patterns.
Price / call$0.01
Success—
StatusUnknown
How this service works
Is the domain's email hosted by proton mail? Looks up the MX records (Cloudflare DoH) and matches them against proton-mail'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 Proton Mail, along with the full list of MX hosts found via Cloudflare DoH and which specific hosts matched Proton Mail's mail-exchanger patterns.
Example use cases
Sales prospect email provider check
“Before I reach out to this lead, can you tell me if acmecorp.com is using Proton Mail for their email? I want to tailor my pitch around their current email provider.”
Email migration source detection
“We're helping a client migrate their email. Can you check if theirdomain.com is currently hosted on Proton Mail so we know what platform we're migrating from?”
Privacy-first company identification
“I'm building a list of companies that use Proton Mail as a signal of privacy-conscious culture — can you check if signal.org's email is hosted by Proton Mail?”
Technical details
Endpoint
GEThttps://email.intel.rallylive.ca/email/hosted-by/proton-mail?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need to determine if a domain's email is hosted by Proton Mail rather than another provider. It is ideal for sales intelligence workflows, email migration assessments, or privacy-focused company segmentation. Prefer this over generic MX lookup tools when you need provider-specific pattern matching against Proton Mail's infrastructure, and when you want a simple yes/no answer with supporting evidence rather than raw DNS data.
Side effects
- Domain not found or does not exist — returns no match with empty MX records
- Domain has no MX records configured — returns no with empty host list
- Cloudflare DoH lookup timeout or DNS resolution failure — service error response
- Invalid domain format provided — returns error or no result
- Domain uses a Proton Mail custom domain alias not matching known patterns — may return false negative
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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