# RequestType

The processing mode for a SOAP API call (immediate synchronous handling versus queued asynchronous handling).

## Values

| Name           | Description                                                                                                                    |
| -------------- | ------------------------------------------------------------------------------------------------------------------------------ |
| `Asynchronous` | The request is queued for processing. Responses are delivered to a response endpoint such as an email address or callback URL. |
| `Synchronous`  | The request is processed immediately after submission, and the result is returned when processing completes.                   |

## Related Items

- [CreateOptions](/docs/marketing/marketing-cloud/guide/createoptions.md)
- [PerformOptions](/docs/marketing/marketing-cloud/guide/performoptions.md)
- [RetrieveOptions](/docs/marketing/marketing-cloud/guide/retrieveoptions.md)
- [UpdateOptions](/docs/marketing/marketing-cloud/guide/updateoptions.md)