# API Reference


**Symitar eDocs References:** <a href="https://learnmore.symitar.com/edocs/#xml/SymXchange/SymXchangeAPIVrsn_C.html" target="_blank" rel="noopener noreferrer">SymXchange API Version</a>, <a href="https://learnmore.symitar.com/edocs/#xml/SymXchange/SymXchangeSrvcsCnfgInstnc_R.html" target="_blank" rel="noopener noreferrer">Available SymXchange Services</a>


## SymXchange Versions

Below are the SymXchange versions that have published API references.


We ensure <a href="https://libum.io/nexum/" target="_blank" rel="noopener noreferrer">NexumAPI</a> 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.



[Persistent](/docs/nexum/symxchange/api-reference/persistent)



[v2022.01](/docs/nexum/symxchange/api-reference/v2022.01)


## 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.