Simple, predictable pricing
for code execution

Yes. Basic is free forever — 500 executions per month, no credit card needed. It's enough to integrate, prototype, and run small evaluation suites. Sign up via RapidAPI and you'll get an API key in under a minute.

One call to POST /v1/execute, one async job started via POST /v1/execute?async=true, or one item inside a batch. Streaming requests count as one execution per stream — the SSE event count doesn't matter. Failed compilations and timeouts still count.

Each POST /v1/sessions/{id}/execute counts as one execution. Creating a session is free. Installing packages inside a session counts as one execution per install call, regardless of how many packages you install in that call.

Requests beyond your quota return HTTP 429. Your quota resets at the start of each calendar month UTC. There's no overage billing — you must upgrade tiers to handle more. Rate-limit headers (X-RateLimit-Remaining, X-RateLimit-Reset) are included on every response so you can throttle proactively.

Yes, at any time, in either direction. On RapidAPI, upgrades take effect immediately and prorate. Downgrades take effect at the next billing cycle. There's no minimum commitment beyond the monthly billing period.

If you cancel within 7 days of upgrading and have used less than 10% of your tier's quota, we issue a full refund. Beyond that, we don't refund partial months. Cancel any time to stop future charges. We never charge after cancellation.

Self-hosting isn't supported in Phase 2. If you have a regulated-environment requirement (HIPAA, FedRAMP, on-prem), reach out to [email protected] — we're scoping a self-hosted edition for late 2026.

Same endpoints, different billing. RapidAPI is faster to set up and uses your existing RapidAPI account. The direct channel at api.sandboxapi.dev bypasses the proxy (lower latency by ~30ms) and uses Stripe for billing. Direct customers get programmatic key rotation and webhook IP allowlisting.