> ## Documentation Index
> Fetch the complete documentation index at: https://developers.fireblocks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Upsert vault and asset UTXO selection config

> Creates or updates the UTXO selection strategy for this vault account and asset. `ADAPTIVE` is recommended.
**Note:** These endpoints are currently in beta and might be subject to changes.
Endpoint Permission: Admin, Non-Signing Admin.



## API Specification

The full API specification for this endpoint is available in the [documentation index](https://developers.fireblocks.com/llms.txt).