---
title: "act: keep buyer"
description: "the whole profile as it should stand next, with its predicate's tree given in full, its bindings and its ladder to the profile as its next version, ready, or not ready with the compiler's reason; the predicate kept by its hash"
section: reference
address: /reference/act/keep_buyer
contract: 0476e35e6e275db5
---
# act: keep buyer
the whole profile as it should stand next, with its predicate's tree given in full, its bindings and its ladder to the profile as its next version, ready, or not ready with the compiler's reason; the predicate kept by its hash
[figure: The caller sends KeepBuyerInput to /v1/act/keep_buyer. The platform returns a card whose body is KindOfBuyer.]
POST/v1/act/keep_buyer
Keep a buyer profile. The call needs the brand rung under a token with the act grant, and it is served by the platform.
The route takes [KeepBuyerInput](/concepts/keepbuyerinput) and returns a card whose body is [KindOfBuyer](/concepts/kindofbuyer).
## Request body
The request body is [KeepBuyerInput](/concepts/keepbuyerinput).
| field | type | required | note |
|---|---|---|---|
| `kind_of_buyer` | [KindOfBuyer](/concepts/kindofbuyer) | yes | the whole profile, with the predicate's tree given in full |
## Response
The route returns a card whose body is [KindOfBuyer](/concepts/kindofbuyer). 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 brand rung and a token with the act grant. The platform serves this route.
## Example
The example sends the smallest body that KeepBuyerInput allows. The build validates it against the schema of KeepBuyerInput.
Example
```sh
curl -X POST https://api.scaleintelligence.co/v1/act/keep_buyer \
-H "Scale-Key: $SCALE_KEY" -H "Scale-Scope: tenant/" \
-H "content-type: application/json" \
-d '{ "kind_of_buyer": { "name": "…", "sentence": "…", "predicate": { "tree": { "form": "group" }, "population": "…", "tree_hash": "…", "register_hash": "…", "compiler_version": "…", "comparator_versions": {} }, "bindings": [], "ladder": "…" } }'
```
```typescript
import { client } from "@scale/sdk";
const answer = await client.act.keep_buyer({
"kind_of_buyer": {
"name": "…",
"sentence": "…",
"predicate": {
"tree": {
"form": "group"
},
"population": "…",
"tree_hash": "…",
"register_hash": "…",
"compiler_version": "…",
"comparator_versions": {}
},
"bindings": [],
"ladder": "…"
}
});
// answer.body is a KindOfBuyer. answer.foot holds the basis, the scope and the time.
```
```python
import requests
answer = requests.post("https://api.scaleintelligence.co/v1/act/keep_buyer",
headers={"Scale-Key": KEY, "Scale-Scope": "tenant/"},
json={
"kind_of_buyer": {
"name": "…",
"sentence": "…",
"predicate": {
"tree": {
"form": "group"
},
"population": "…",
"tree_hash": "…",
"register_hash": "…",
"compiler_version": "…",
"comparator_versions": {}
},
"bindings": [],
"ladder": "…"
}
}).json()
```
```rust
let answer: Card = client.post("https://api.scaleintelligence.co/v1/act/keep_buyer")
.header("Scale-Key", key).header("Scale-Scope", "tenant/")
.json(&KeepBuyerInput { /* the fields of the page */ }).send().await?.json().await?;
```