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Substack.com Down Status Change Watcher
x402
Substack.com Down Status Change Watcher is a paid API for AI agents from monitor.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).
Monitors substack.com availability and returns whether its status has changed since the last check, with before/after field diffs and timestamps.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for is substack com down: runs the check, compares it with the result from your previous call for the same query (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 availability answer for substack.com, a boolean 'changed' flag indicating whether the status differs from the previous call, a list of fields that changed with their before and after values, and the timestamp of when the status was last seen. Previous check results are retained for 90 days per query.
Example use cases
Newsletter platform outage alert
“I publish on Substack and need to know immediately if the site goes down — can you watch substack.com and ping me when its status changes?”
Scheduled uptime monitoring for Substack
“Poll substack.com every few minutes and tell me whenever the availability status flips — I want to catch any outages or recoveries as they happen.”
Confirming Substack recovery after outage
“Substack was down earlier — has its status changed back to up since the last check? Show me what changed and when it was last seen.”
Technical details
Endpoint
GEThttps://monitor.intel.rallylive.ca/watch/monitor/is-down/substack-com?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to detect changes in substack.com's availability over time rather than just a one-time spot check. It is ideal for scheduled polling workflows where you want to be alerted only when something actually changes, avoiding noise from repeated identical results. Prefer it over a plain 'is-down' check when you need the before/after diff and change timestamp for logging or alerting pipelines.
Side effects
- No previous check stored (first call returns current state only, changed=false or null)
- Network error reaching substack.com from the monitoring edge (may return timeout or error status)
- Payment failure for $0.02 USDC via x402 protocol (request rejected before check runs)
- Stale comparison if last check was older than 90-day retention window
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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