---
title: "act: keep monitor"
description: "its name, its predicate, the place it runs at, the kind of signal it makes, the strategy where one is chosen, and for a platform monitor the vertical to the monitor with its version, not armed; not ready while its predicate does not compile at its place, with the reasons from compile"
section: reference
address: /reference/act/keep_monitor
contract: 0476e35e6e275db5
---
# act: keep monitor
its name, its predicate, the place it runs at, the kind of signal it makes, the strategy where one is chosen, and for a platform monitor the vertical to the monitor with its version, not armed; not ready while its predicate does not compile at its place, with the reasons from compile
[figure: The caller sends KeepMonitorInput to /v1/act/keep_monitor. The platform returns a card whose body is Monitor.]
POST/v1/act/keep_monitor
Keep a monitor. The call needs the strategy rung under a token with the act grant, and it is served by either, by the size bound.
The route takes [KeepMonitorInput](/concepts/keepmonitorinput) and returns a card whose body is [Monitor](/concepts/monitor).
## Request body
The request body is [KeepMonitorInput](/concepts/keepmonitorinput).
| field | type | required | note |
|---|---|---|---|
| `name` | `text` | yes | |
| `predicate` | [Predicate](/concepts/predicate) | yes | the tree, compiled at the place |
| `place` | [PlaceARunsAt](/concepts/placearunsat) | yes | |
| `kind_of_signal` | [KindOfSignal](/concepts/kindofsignal) | yes | |
| `strategy` | `id` | no | the brand's standing strategy unless one is chosen |
| `vertical` | `text` | no | for a platform monitor |
## Response
The route returns a card whose body is [Monitor](/concepts/monitor). Every card ends with a foot that states the basis of each number, the scope of the call, and the time when the facts were true.
## Headers
| header | required | meaning |
|---|---|---|
| `Scale-Scope` | yes | the scope the call runs in: tenant/, then /brand/, then /strategy/ |
| `Scale-As-True-On` | no | the date the facts must have been true on; defaults to now |
| `Scale-As-Known-On` | no | the date the facts must have been known on; defaults to now |
| `Scale-Key` | no | for a change, the key made from the input; a repeat under the same key returns the unit held and writes nothing |
A caller needs the strategy rung and a token with the act grant. The platform or the desktop app serves this route.
## Example
The example sends the smallest body that KeepMonitorInput allows. The build validates it against the schema of KeepMonitorInput.
Example
```sh
curl -X POST https://api.scaleintelligence.co/v1/act/keep_monitor \
-H "Scale-Key: $SCALE_KEY" -H "Scale-Scope: tenant/" \
-H "content-type: application/json" \
-d '{ "name": "…", "predicate": { "tree": { "form": "group" }, "population": "…", "tree_hash": "…", "register_hash": "…", "compiler_version": "…", "comparator_versions": {} }, "place": "…", "kind_of_signal": "…" }'
```
```typescript
import { client } from "@scale/sdk";
const answer = await client.act.keep_monitor({
"name": "…",
"predicate": {
"tree": {
"form": "group"
},
"population": "…",
"tree_hash": "…",
"register_hash": "…",
"compiler_version": "…",
"comparator_versions": {}
},
"place": "…",
"kind_of_signal": "…"
});
// answer.body is a Monitor. answer.foot holds the basis, the scope and the time.
```
```python
import requests
answer = requests.post("https://api.scaleintelligence.co/v1/act/keep_monitor",
headers={"Scale-Key": KEY, "Scale-Scope": "tenant/"},
json={
"name": "…",
"predicate": {
"tree": {
"form": "group"
},
"population": "…",
"tree_hash": "…",
"register_hash": "…",
"compiler_version": "…",
"comparator_versions": {}
},
"place": "…",
"kind_of_signal": "…"
}).json()
```
```rust
let answer: Card = client.post("https://api.scaleintelligence.co/v1/act/keep_monitor")
.header("Scale-Key", key).header("Scale-Scope", "tenant/")
.json(&KeepMonitorInput { /* the fields of the page */ }).send().await?.json().await?;
```