Just wanted to share that while probably far from perfect, we have created a node.js client for balanced payments (balancedpayments.com). We needed a version and while there are some out there none were very complete for node so we took it as a sign we needed to contribute back. You can find the repository at https://github.com/TenorEnterprises/nbalanced and the npm package at https://npmjs.org/package/nbalanced.