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upstream-tanstack-query/docs/framework/angular/reference/functions/provideQueryClient.md
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---
id: provideQueryClient
title: provideQueryClient
---
```ts
function provideQueryClient(queryClient): Provider;
```
Defined in: [packages/angular-query-experimental/src/providers.ts:22](https://github.com/TanStack/query/blob/main/packages/angular-query-experimental/src/providers.ts#L22)
Usually [provideTanStackQuery](provideTanStackQuery.md) is used once to set up TanStack Query and the
[`QueryClient`](https://tanstack.com/query/latest/docs/reference/QueryClient) for the entire application —
it calls `provideQueryClient` internally. Use `provideQueryClient` directly to provide a different
`QueryClient` instance for part of the application, or for unit testing.
## Parameters
### queryClient
A `QueryClient` instance, or an `InjectionToken` which provides a `QueryClient`.
[`QueryClient`](../classes/QueryClient.md) | `InjectionToken`\<[`QueryClient`](../classes/QueryClient.md)\>
## Returns
`Provider`
A provider object that can be used to provide the `QueryClient` instance.
## Example
Providing a test-only `QueryClient` in a component test, without wiring up `provideTanStackQuery`'s other
defaults:
```ts
TestBed.configureTestingModule({
providers: [provideQueryClient(new QueryClient())],
})
```