curl --request POST \
  --url https://api.enterprise.sandbox.uphold.com/core/networks/{network}/validate-address \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "address": "tb1qgu0gacn9pqpnvlqclvdwyz4gfgxz8pptfz4emt"
}
'

{
  "isValid": true
}