# Type Alias: FetchBody

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• **FetchBody** = [`ArrayBuffer`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) \| `null` \| [`ReadableStream`](https://developer.mozilla.org/docs/Web/API/ReadableStream) \| `string` \| [`Uint8Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) \| `undefined` \| [`URLSearchParams`](https://developer.mozilla.org/docs/Web/API/URLSearchParams)

A request body supported by openid-client's Fetch API integration.
