ModKie bills API usage in credits: async generation charges only on successful recordInfo responses. Before createTask accepts a job, the platform checks that your balance covers the model’s creditCost from GET /models. If the job later fails (state=fail), those credits are not deducted.
Subscription and one-time credit packs are listed on /pricing. Training jobs on RunPod may pre-hold credits by GPU tier and duration. Monitor usage under Settings → Usage.
See /docs/api-platform/market-quickstart for balance endpoints.