What is overage billing?

When overage applies

Only to API calls — not in-app tool runs. Web app runs are governed by your daily fair-use cap, which doesn't bill overages.

Tier quotas + overage rate

Why we offer it

Without overage, you'd hit a hard wall mid-month. With overage:

• Casual API users stay on Pro, paying ~$5–10 extra in busy months instead of jumping to Business.
• Heavy users still benefit from upgrading (cheaper per-call rate).

Capping overage

We respect your wallet. By default, overage is capped at $20/month on Pro, $100 on Business. To go higher, raise the cap in /account/billing/ → Limits.

If you hit your cap mid-month, API calls return 429 with Retry-After until the cap resets next month or you raise it.

Avoiding overage

• Cache responses in your app. We send Cache-Control headers on idempotent endpoints.
• Use webhooks instead of polling.
• Batch where possible — many tools accept array inputs.
• Move to Business tier if you're consistently >2x quota.

Viewing usage

/account/api/usage/ shows per-day call count + projected month-end. Daily email summary is opt-in.