# List available shared preload libraries

`GET /projects/{project_id}/available_preload_libraries`

Returns the shared preload libraries available for the specified project's Postgres version. Shared preload libraries are Postgres extensions that require the `shared_preload_libraries` setting and a compute restart to activate. Use this list to determine which libraries can be enabled in the project's `settings.preload_libraries` configuration.

[Markdown for AI context](/guides/apis-sdks-reference-api-projects-get-available-preload-libraries)

```bash title="REST API - curl"
curl "https://console.neon.tech/api/v2/projects/$PROJECT_ID/available_preload_libraries" \
  -H "Authorization: Bearer $NEON_API_KEY"
```

Every field below is optional. An empty body works too.

```typescript title="Also available in"
import { createNeonClient, raw } from '@neon/sdk';

const neon = createNeonClient({ apiKey: process.env.NEON_API_KEY });
const { data } = await raw.getAvailablePreloadLibraries({
  client: neon.client,
  path: {
    project_id: process.env.PROJECT_ID
  }
});
```

## Parameters

Project ID

`project_id`

string

## Response

200

Successfully returned available shared preload libraries

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## Errors

default

General error

This endpoint can return the standard Neon API error response.

Response fields

- `message` Required. Human-readable error message.
- `code` Required. Machine-readable error code.
- `request_id` Optional. Request identifier for debugging. You can provide one with the `X-Request-ID` header.

Retry guidance

If no response is returned, the request may still have reached the server. This is why retry safety depends on the method and status code.

Idempotent methods (`GET`, `HEAD`, `OPTIONS`) are generally safe to retry after a network error or timeout. Non-idempotent methods (`POST`, `PATCH`, `DELETE`, `PUT`) can change state, so avoid automatic retries unless your workflow can tolerate duplicate effects.

Responses with `423 Locked` or `503 Service Unavailable` are safe to retry. `423 Locked` means the resource is temporarily locked, usually because another operation is in progress.

## Related pages

- [Accept a project transfer request](./apis-sdks-reference-api-projects-accept-project-transfer-request.md)
- [Add JWKS URL](./apis-sdks-reference-api-projects-add-project-jwks.md)
- [Create a project transfer request](./apis-sdks-reference-api-projects-create-project-transfer-request.md)
- [Create project](./apis-sdks-reference-api-projects-create-project.md)
- [Delete JWKS URL](./apis-sdks-reference-api-projects-delete-project-jwks.md)
- [Delete project](./apis-sdks-reference-api-projects-delete-project.md)
- [Delete VPC endpoint restriction](./apis-sdks-reference-api-projects-delete-project-vpc-endpoint.md)
- [Grant project access](./apis-sdks-reference-api-projects-grant-permission-to-project.md)
- [List JWKS URLs](./apis-sdks-reference-api-projects-get-project-jwks.md)
- [List org members and their project roles](./apis-sdks-reference-api-projects-list-project-members.md)

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