---
title: "act: webhook"
description: "the address, what to be told about, and a secret to sign with to the row"
section: reference
address: /reference/act/webhook
contract: 0476e35e6e275db5
---
# act: webhook
the address, what to be told about, and a secret to sign with to the row
[figure: The caller sends WebhookInput to /v1/act/webhook. The platform returns a card whose body is Telling.]
POST/v1/act/webhook
Register an address to be told at. The call needs the tenant rung under a token with the act grant, and it is served by the platform.
The route takes [WebhookInput](/concepts/webhookinput) and returns a card whose body is [Telling](/concepts/telling).
## Request body
The request body is [WebhookInput](/concepts/webhookinput).
| field | type | required | note |
|---|---|---|---|
| `telling` | [Telling](/concepts/telling) | yes | |
## Response
The route returns a card whose body is [Telling](/concepts/telling). 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 tenant rung and a token with the act grant. The platform serves this route.
## Example
The example sends the smallest body that WebhookInput allows. The build validates it against the schema of WebhookInput.
Example
```sh
curl -X POST https://api.scaleintelligence.co/v1/act/webhook \
-H "Scale-Key: $SCALE_KEY" -H "Scale-Scope: tenant/" \
-H "content-type: application/json" \
-d '{ "telling": { "tenant": "…", "address": "…", "kinds": [], "secret": "…", "tries_bound": 0, "failed_calls": [] } }'
```
```typescript
import { client } from "@scale/sdk";
const answer = await client.act.webhook({
"telling": {
"tenant": "…",
"address": "…",
"kinds": [],
"secret": "…",
"tries_bound": 0,
"failed_calls": []
}
});
// answer.body is a Telling. answer.foot holds the basis, the scope and the time.
```
```python
import requests
answer = requests.post("https://api.scaleintelligence.co/v1/act/webhook",
headers={"Scale-Key": KEY, "Scale-Scope": "tenant/"},
json={
"telling": {
"tenant": "…",
"address": "…",
"kinds": [],
"secret": "…",
"tries_bound": 0,
"failed_calls": []
}
}).json()
```
```rust
let answer: Card = client.post("https://api.scaleintelligence.co/v1/act/webhook")
.header("Scale-Key", key).header("Scale-Scope", "tenant/")
.json(&WebhookInput { /* the fields of the page */ }).send().await?.json().await?;
```