[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [local‑first/Owner](https://evolu.dev/docs/api-reference/common/local-first/Owner) › OwnerWriteKey

```ts
const OwnerWriteKey: brand("OwnerWriteKey", Entropy16);
```

Defined in: [packages/common/src/local-first/Owner.ts:118](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/local-first/Owner.ts#L118)

A secure token for write operations. It's derived from [OwnerSecret](https://evolu.dev/docs/api-reference/common/local-first/Owner/variables/OwnerSecret) by
default and can be rotated via [createOwnerWriteKey](https://evolu.dev/docs/api-reference/common/local-first/Owner/functions/createOwnerWriteKey).