> ## Documentation Index
> Fetch the complete documentation index at: /docs/llms.txt
> Use this file to discover all available pages before exploring further.

# services

# `prefect.concurrency.v1.services`

## Classes

### `ConcurrencySlotAcquisitionServiceError` <sup>[https://github.com/PrefectHQ/prefect/blob/main/src/prefect/concurrency/v1/services.py#L21](https://github.com/PrefectHQ/prefect/blob/main/src/prefect/concurrency/v1/services.py#L21)</sup>

Raised when an error occurs while acquiring concurrency slots.

### `ConcurrencySlotAcquisitionService` <sup>[https://github.com/PrefectHQ/prefect/blob/main/src/prefect/concurrency/v1/services.py#L25](https://github.com/PrefectHQ/prefect/blob/main/src/prefect/concurrency/v1/services.py#L25)</sup>

**Methods:**

#### `acquire` <sup>[https://github.com/PrefectHQ/prefect/blob/main/src/prefect/concurrency/v1/services.py#L39](https://github.com/PrefectHQ/prefect/blob/main/src/prefect/concurrency/v1/services.py#L39)</sup>

```python theme={null}
acquire(self, task_run_id: UUID, timeout_seconds: Optional[float] = None) -> httpx.Response
```