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Is Email Hosted by Proton Mail – Change Watch
x402
Is Email Hosted by Proton Mail – Change Watch is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-24).
Checks whether a domain's email is hosted by Proton Mail and returns a change-detected comparison against the previous check result, including which fields changed and before/after values.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for is email hosted by proton mail: runs the check, compares it with the result from your previous call for the same domain (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.
Output
Returns whether the domain's email is currently hosted by Proton Mail (boolean), a 'changed' flag indicating whether the result differs from the previous check (kept for 90 days), a list of fields that changed with their before and after values, and the timestamp of when the state was last observed.
Example use cases
Competitor email migration alert
“Watch protonmail.com's own domain for any change in whether it's still hosted by Proton Mail and alert me if anything shifts.”
Privacy-conscious vendor vetting
“I want to know if whistleblower.org moves to or away from Proton Mail for their email — can you set up a watch so I get notified when it changes?”
Sales intelligence trigger
“Monitor signal.org to see if they switch their email hosting to Proton Mail — I want to know the moment that changes so I can reach out.”
Technical details
Endpoint
GEThttps://email.intel.rallylive.ca/watch/email/hosted-by/proton-mail?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to be alerted to changes in whether a domain uses Proton Mail specifically — not just a point-in-time lookup. It is ideal for scheduled monitoring workflows where you want a diff between the current and previous state rather than just the current value. Prefer the non-watch sibling endpoint for one-off checks.
Side effects
- Domain not supplied — returns error indicating missing required query parameter
- DNS lookup failure via Cloudflare DoH — may return indeterminate result
- No previous check on record (first call) — 'changed' field will be false or null with no before/after values
- Domain has no MX records — result will be false with no Proton Mail match
- Payment not completed (x402) — request blocked before check runs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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