# isTokenHeader

**Kind:** Function

**Source:** [`src/utils/jwt/jwt.ts`](https://github.com/honojs/hono/blob/main/src/utils/jwt/jwt.ts#L44)

**Part of:** [Utils](subsystem-src-utils)

## Signature

```ts
function isTokenHeader(obj: unknown): obj is TokenHeader
```

## Parameters

| Name | Type |
|---|---|
| `obj` | `unknown` |

**Returns:** `obj is TokenHeader`