---
title: "act: bind buyer"
description: "the kind, an offering or a segment, the weight, the mode to the binding, and the preview of the kind's members"
section: reference
address: /reference/act/bind_buyer
contract: 0476e35e6e275db5
---
# act: bind buyer
the kind, an offering or a segment, the weight, the mode to the binding, and the preview of the kind's members
[figure: The caller sends BindBuyerInput to /v1/act/bind_buyer. The platform returns a card whose body is BindBuyerAnswer.]
POST/v1/act/bind_buyer
Bind 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 [BindBuyerInput](/concepts/bindbuyerinput) and returns a card whose body is [BindBuyerAnswer](/concepts/bindbuyeranswer).
## Request body
The request body is [BindBuyerInput](/concepts/bindbuyerinput).
| field | type | required | note |
|---|---|---|---|
| `kind_of_buyer` | `id` | yes | |
| `bindings` | [Binding](/concepts/binding) | yes | |
| `ladder` | `text` | no | the ladder the kind climbs, by its name, where the binding changes it; the ladder must be kept and ready |
## Response
The route returns a card whose body is [BindBuyerAnswer](/concepts/bindbuyeranswer). 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 BindBuyerInput allows. The build validates it against the schema of BindBuyerInput.
Example
```sh
curl -X POST https://api.scaleintelligence.co/v1/act/bind_buyer \
-H "Scale-Key: $SCALE_KEY" -H "Scale-Scope: tenant/" \
-H "content-type: application/json" \
-d '{ "kind_of_buyer": "…", "bindings": [] }'
```
```typescript
import { client } from "@scale/sdk";
const answer = await client.act.bind_buyer({
"kind_of_buyer": "…",
"bindings": []
});
// answer.body is a BindBuyerAnswer. answer.foot holds the basis, the scope and the time.
```
```python
import requests
answer = requests.post("https://api.scaleintelligence.co/v1/act/bind_buyer",
headers={"Scale-Key": KEY, "Scale-Scope": "tenant/"},
json={
"kind_of_buyer": "…",
"bindings": []
}).json()
```
```rust
let answer: Card = client.post("https://api.scaleintelligence.co/v1/act/bind_buyer")
.header("Scale-Key", key).header("Scale-Scope", "tenant/")
.json(&BindBuyerInput { /* the fields of the page */ }).send().await?.json().await?;
```