API Latency Budget
Calculate API latency budgets from SLA requirements. Distribute response time across application, database, and external service layers. Code never leaves your device — formatting and validation run locally in your browser.
How to Use the API Latency Budget
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Frequently Asked Questions
p50, p95, p99 — which matters?
p99 for user experience promises; p50 for typical cost math.
How is budget math done?
Millisecond allowances split across services in the call chain.
Timeouts from budgets?
Set timeouts just above p99 — tight enough to fail fast, loose enough to pass.
Are my numbers uploaded anywhere?
No — calculation runs locally in your browser, free with no signup.
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Last updated October 2026