> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mobula.io/llms.txt
> Use this file to discover all available pages before exploring further.

# BucketKeyInput

> Compound key used to group webhooks for batched delivery (input form).

### TypeScript shape

```ts theme={null}
interface BucketKeyInput {
  bucketId: string;
  bucketSortKey: string;
}
```

Both fields are required when `bucketKey` is provided. Returns `BAD_USER_INPUT` if either half is empty.

<ResponseField name="bucketId" type="String!" required>Bucket identifier.</ResponseField>
<ResponseField name="bucketSortKey" type="String!" required>Sort key within the bucket.</ResponseField>