curl --request GET \
  --url https://billing.runtools.ai/v1/billing/plan \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "orgId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "plan": "free",
    "balanceCents": 123,
    "totalGrantedCents": 123,
    "totalUsedCents": 123
  }
}