---
title: "act: deepen"
description: "an observation, and the depth: fetched in full, or given meaning to a deepening"
section: reference
address: /reference/act/deepen
contract: 0476e35e6e275db5
---
# act: deepen
an observation, and the depth: fetched in full, or given meaning to a deepening
[figure: The caller sends DeepenInput to /v1/act/deepen. The platform returns a card whose body is Deepening.]
POST/v1/act/deepena task, 202
Ask for depth. The call needs the strategy rung under a token with the act grant, and it is served by the platform.
The route takes [DeepenInput](/concepts/deepeninput) and returns a card whose body is [Deepening](/concepts/deepening).
## Request body
The request body is [DeepenInput](/concepts/deepeninput).
| field | type | required | note |
|---|---|---|---|
| `observation` | `id` | yes | |
| `depth` | `one of fetch \| embed \| both` | yes | |
| `asked_by` | [UnitRef](/concepts/unitref) | yes | |
## Response
The route returns a card whose body is [Deepening](/concepts/deepening). 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. This route runs as a long step and returns a task with status 202. `POST /v1/work/status` returns the task's progress, and `POST /v1/work/cancel` stops the task.
## 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 serves this route.
## Example
The example sends the smallest body that DeepenInput allows. The build validates it against the schema of DeepenInput.
Example
```sh
curl -X POST https://api.scaleintelligence.co/v1/act/deepen \
-H "Scale-Key: $SCALE_KEY" -H "Scale-Scope: tenant/" \
-H "content-type: application/json" \
-d '{ "observation": "…", "depth": "fetch", "asked_by": { "id": "…", "kind": "…" } }'
```
```typescript
import { client } from "@scale/sdk";
const answer = await client.act.deepen({
"observation": "…",
"depth": "fetch",
"asked_by": {
"id": "…",
"kind": "…"
}
});
// answer.body is a Deepening. answer.foot holds the basis, the scope and the time.
```
```python
import requests
answer = requests.post("https://api.scaleintelligence.co/v1/act/deepen",
headers={"Scale-Key": KEY, "Scale-Scope": "tenant/"},
json={
"observation": "…",
"depth": "fetch",
"asked_by": {
"id": "…",
"kind": "…"
}
}).json()
```
```rust
let answer: Card = client.post("https://api.scaleintelligence.co/v1/act/deepen")
.header("Scale-Key", key).header("Scale-Scope", "tenant/")
.json(&DeepenInput { /* the fields of the page */ }).send().await?.json().await?;
```