Monitors
A Monitor is “a scheduled check on something outside a startup’s control”: wrap any data call and hear only when it changes.
- Noun
- Monitor
- Calls
- 2
- Emits
Monitor.created,Monitor.checked
A Data Verb reads the market and returns a reading. A Software Verb changes your records and emits an Event. Every call here is a Data Verb: it reads, and it changes a record only where its Effects say so.
Properties
| Field | Type | What null means |
|---|---|---|
$id | string | Never null: the Monitor’s address. |
verb | string | Never null. |
input | object | Never null. |
change | string | Never null. |
threshold | number | null | The change has no threshold. |
every | string | Never null. |
nextRunAt | string, in ISO 8601 | Never null. |
lastResult | string | null | It has not run yet. |
costPerRun | Cost, in USD | Never null: what one run costs at the wrapped call’s price. |
monitor | Monitor | Never null: with its latest result. |
ranAt | string, in ISO 8601 | Never null. |
changed | boolean | Never null: whether this run crossed the Monitor’s change and threshold. |
summary | string | Never null: what moved, in one sentence. |
event | string | Never null: the address of the Event this run recorded. |
cost | Cost, in USD | Never null: what the wrapped call spent. |
Object
{
"$id": "https://api.sb/leaseline.app/monitors/monitor_Rk2a" ,
"verb": "Keyword.search",
"input": {
"keyword": "rent tracking app for landlords",
"venue": "google-search"
},
"change": "rank-change",
"threshold": 3,
"every": "1d",
"nextRunAt": "2026-10-28T06:00:00Z" ,
"lastResult": null,
"costPerRun": {
"usd": 0,
"maxUsd": 0.0003,
"units": 1,
"misses": 0
}
}Verbs
| Verb | The question it answers | Price | Success rate |
|---|---|---|---|
Monitor.create | Can my agents tell me when something I care about changes? | Free | 99.2% of 2,079,088 calls |
Monitor.check | Has it changed since the last run? | Free | 99.6% of 2,079,088 calls |
The order you call them in
Monitor.create: Can my agents tell me when something I care about changes?Monitor.check: Has it changed since the last run?
Works with
None.