JSON API Field Monitor
Monitor a single JSON field from an API response and skip everything else. The AI alerts you when the value you care about changes, like a price, a status flag, or a deprecated flag flipping to true, and ignores volatile fields such as timestamps, request IDs, and cursors.
JSON API Field Monitor
Track one JSON field and skip the noisy rest of the response.
1Paste the JSON API endpoint URL→
2We watch the exact field you care about→
3AI flags your field, not the noise
Works with any public JSON API endpoint.
Example JSON endpoints
Our AI reads every change and only alerts you when this happens, so routine updates never reach your inbox. Edit it to fit what you care about.
Instantly the moment it matters, or batched into one digest email.
Under 1 hour requires a paid plan
Frequently asked questions
How do I monitor a single JSON field?
Paste the URL of the JSON endpoint you want to watch and point the monitor at the field you care about. PageCrawl checks the response for you and the AI alerts you when that specific value changes, so you track one field like a price or status flag without watching the whole response.
Will noisy fields like timestamps trigger false alerts?
No. The tool is built to ignore volatile fields such as timestamps, request IDs, cursors, and other values that change on every call. It focuses on the field you chose, so a flip like a deprecated flag going true or a price update triggers an alert, while routine response churn does not.
Is it free and how quickly does it alert?
It is free to start and works on any public JSON endpoint. You can choose instant alerts the moment your chosen field changes value, or a daily or weekly digest if you prefer a periodic summary. Instant is useful for status flags, while a digest suits fields you check on a slower cadence.
Monitor any web page for changes
PageCrawl watches any page and alerts you the moment something important changes. Set up your first monitor in under a minute.
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