Service
Cainbudget
FULL PLAN ONLY
Per-principal spend budgets (day / month / total windows) with atomic, fail-closed reservations, idempotent retries and a signed receipt for every allow and deny.
No per-call charge -- unlimited under your subscription
Worked example
Create Budget
curl -X POST https://cainstudio.online/cainbudget/budgets \
-H "X-API-Key: $CAIN_API_KEY" \
-H "Content-Type: application/json" \
-d '{"principal": "...", "currency": "USD", "limit": "...", "window": "month", "name": "..."}'