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Is Email Hosted By Posteo – Change Watch
x402
Is Email Hosted By Posteo – 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 2026-10-20).
Monitors whether a domain's email is hosted by Posteo and alerts when the result changes, returning a diff with before/after values and timestamps.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for is email hosted by posteo: 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 the current Posteo-hosted boolean result, a 'changed' true/false flag comparing against the prior call result (retained for 90 days), a list of changed fields with before and after values, and a timestamp of when the status was last seen.
Example use cases
Competitor email provider migration alert
“Watch acme.com and notify me the moment they switch away from Posteo for their email hosting — I want to see exactly what changed and when.”
Privacy-focused hosting compliance check
“I need to confirm that nonprofit-example.org is still using Posteo for email, and alert me if that ever changes so I can flag it for our compliance records.”
Lead qualification trigger on email platform change
“Monitor prospectco.com and tell me if they move off Posteo email — that's a signal I want to use to reach out to them about our service.”
Technical details
Endpoint
GEThttps://email.intel.rallylive.ca/watch/email/hosted-by/posteo?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to be alerted to changes in Posteo email hosting status for a domain over time, rather than just a one-off check. It is ideal for scheduled polling workflows where you want diff-aware results (what changed, before/after values) without maintaining your own state. If you only need a single point-in-time answer, prefer the non-watch variant. For bulk monitoring of many domains simultaneously, prefer the bulk sibling endpoint.
Side effects
- Domain not previously queried — no baseline for comparison, 'changed' may be null or false on first call
- DNS lookup failure via Cloudflare DoH returns an error or inconclusive result
- Domain does not exist or has no MX records — returns false with no comparison data
- Stored previous result expired after 90 days — treated as a fresh first check
- Payment of $0.02 USDC not fulfilled — request rejected with 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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