> For the complete documentation index, see [llms.txt](https://docs.libum.io/nexum/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.libum.io/nexum/symxchange/api-reference.md).

# API Reference

{% hint style="info" %}
**Symitar eDocs References:** [SymXchange API Version](https://learnmore.symitar.com/edocs/#xml/SymXchange/SymXchangeAPIVrsn_C.html), [Available SymXchange Services](https://learnmore.symitar.com/edocs/#xml/SymXchange/SymXchangeSrvcsCnfgInstnc_R.html)
{% endhint %}

## SymXchange Versions

Below are the SymXchange versions that have published API references.

{% hint style="success" %}
We ensure [NexumAPI](https://libum.io/nexum/) is always up-to-date with all Jack Henry™ supported SymXchange versions. At the time of writing this, that would be <mark style="color:purple;">`v2018`</mark> through <mark style="color:purple;">`v2023`</mark> including the <mark style="color:purple;">`persistent`</mark> endpoint.
{% endhint %}

{% content-ref url="/pages/80YNCJErC8xY4UZVPfGS" %}
[Persistent](/nexum/symxchange/api-reference/persistent.md)
{% endcontent-ref %}

{% content-ref url="/pages/YpBXziuyQvplavxpBvlh" %}
[v2022.01](/nexum/symxchange/api-reference/v2022.01.md)
{% endcontent-ref %}

## Understanding your endpoints

We've included the SymXchange version as a first class resource as a parameter in the request path as shown below:

```http
https://naas.ymcu.libum.io/nexum/{sym}/{version}/{service}/{operation}
```

**Note:** The version should be set immediately after the Sym number and before the target SymXchange service.


---

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