There are only two ways to change the isValueChangeable field for a transaction: when a split occurs, and when the maximumValue is equal to the minimumValue. Furthermore, it's worth noting that every transaction is created with a minimumValue of 0.01. As a result, when a transaction is created with a value of 0.01, the isValueChangeable field is automatically set to false.

Create a transaction with a value of 0.01 and access the /capabilities route.

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