# Run task synchronously


```
POST 
https://api.apify.com/v2/actor-tasks/:actorTaskId/run-sync
```


Runs an Actor task and synchronously returns its output.

The run must finish in 300 seconds otherwise the HTTP request fails with a timeout error (this won't abort the run itself).

Optionally, you can override the Actor input configuration by passing a JSON object as the POST payload and setting the `Content-Type: application/json` HTTP header.

Note that if the object in the POST payload does not define a particular input property, the Actor run uses the default value defined by the task (or Actor's input schema if not defined by the task).

Beware that it might be impossible to maintain an idle HTTP connection for an extended period, due to client timeout or network conditions. Make sure your HTTP client is configured to have a long enough connection timeout.

If the connection breaks, you will not receive any information about the run and its status.

Input fields from Actor task configuration can be overloaded with values passed as the POST payload.

Just make sure to specify `Content-Type` header to be `application/json` and input to be an object.

To run the task asynchronously, use the  API endpoint instead.

## Request

### Path Parameters

* **actorTaskId** string required

  Task ID or a tilde-separated owner's username and task's name.

  **Example:** `janedoe~my-task`

### Query Parameters

* **timeout** double

  Optional timeout for the run, in seconds. By default, the run uses a timeout specified in the task settings.

  **Example:** `60`

  **memory** double

  Memory limit for the run, in megabytes. The amount of memory can be set to a power of 2 with a minimum of 128. By default, the run uses a memory limit specified in the task settings.

  **Example:** `256`

  **maxItems** double

  Specifies the maximum number of dataset items that will be charged for pay-per-result Actors. This does NOT guarantee that the Actor will return only this many items. It only ensures you won't be charged for more than this number of items. Only works for pay-per-result Actors. Value can be accessed in the actor run using `ACTOR_MAX_PAID_DATASET_ITEMS` environment variable.

  **Example:** `1000`

  **maxTotalChargeUsd** double

  Specifies the maximum cost of the run. This parameter is useful for pay-per-event Actors, as it allows you to limit the amount charged to your subscription. You can access the maximum cost in your Actor by using the `ACTOR_MAX_TOTAL_CHARGE_USD` environment variable.

  **Example:** `5`

  **restartOnError** boolean

  Determines whether the run will be restarted if it fails.

  **Example:** `false`

  **build** string

  Specifies the Actor build to run. It can be either a build tag or build number. By default, the run uses the build specified in the task settings (typically `latest`).

  **Example:** `0.1.234`

  **outputRecordKey** string

  Key of the record from run's default key-value store to be returned in the response. By default, it is `OUTPUT`.

  **Example:** `OUTPUT`

  **webhooks** string

  Specifies optional webhooks associated with the Actor run, which can be used to receive a notification

  e.g. when the Actor finished or failed. The value is a Base64-encoded JSON array of objects defining the webhooks. For more information, see

  [Webhooks documentation](https://docs.apify.com/platform/integrations/webhooks).

  **Example:** `dGhpcyBpcyBqdXN0IGV4YW1wbGUK...`

### Body**required**

* **object** object

### Status 201

**Response Headers**




```
{
  "bar": "foo"
}
```


**Schema**

* **object** object

### Status 400

**Response Headers**




```
{
  "error": {
    "type": "run-failed",
    "message": "Actor run did not succeed (run ID: 55uatRrZib4xbZs, status: FAILED)"
  }
}
```


**Schema**

* **error** object required

  * **type** string required\
    **Example:** `run-failed`
  * **message** string required\
    **Example:** `Actor run did not succeed (run ID: 55uatRrZib4xbZs, status: FAILED)`