Create a key
Complete individual or corporate verification first. All API keys, including sandbox keys, require approval. Before approval, use the sandbox console. Open Developers in your company console, select the sandbox environment, and create a key withbalance:read. Store it on your server.
Read your balance
SetPLANE_API_KEY to your sandbox key in your server environment, then run:
available, held, and environment. The environment is determined by the API key. Money values are decimal strings.