> For the complete documentation index, see [llms.txt](https://docs.coherent.global/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coherent.global/assistant/custom-functions/xcall-legacy-functions/getoutput.md).

# GETOUTPUT

{% hint style="warning" %}
This is an outdated custom function which we have replaced with [SPARK\_XCALL](/assistant/custom-functions/spark_xcall.md). This is available through the add-in for backward compatibility.
{% endhint %}

## Syntax

`CS.SPARK_GETOUTPUT(xcall_block, output_name)`

* `xcall_block`. Required. Range address of the XCall block in upstream service. E.g. `$A$1:$B$4`. You can also use a named range for convenience.
* `output_name`. Required. Name of the requested output.

### UDFCall Block

Create a [UDFCALLAPI](/assistant/custom-functions/xcall-legacy-functions/udfcallapi.md) block in the Excel workbook (upstream service) to make an API call. The UDFCall block can be anywhere in your workbook but must be on the same sheet as your `Spark_UdfCallAPI` function.

* This table needs to include
  * `CALLTYPE`: `SparkService`
  * `FOLDERNAME`: name of the folder containing downstream service.
  * `SERVICENAME`: name of downstream service.
  * `REQUESTBODY`: payload for calling downstream service. Must be in JSON format. You can copy the `REQUESTBODY` from downstream service API tester. If this is your first time using the SparkService we encourage to leave content of "request\_meta" empty. Spark will use the latest version and the default Service Type to execute this service.
* XCall block example

<figure><img src="/files/nNJdVV6JDnRYZem9ZoXr" alt="" width="330"><figcaption></figcaption></figure>

* `REQUESTBODY` example (v3 format)

```json
{
    "request_data": {
        "inputs": {
            "InputField": "InputValue"
        }
    },
    "request_meta": {}
}
```

## Output

The function will return the value of the output that is selected.


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