API Design · Senior · Question 36 of 75

How should SLOs for a public API be defined?

1As 100% availability
✓Correct answer: Per user-facing capability (e.g. 99.9% of order creations succeed within 500 ms over 30 days), with error budgets guiding release speed
3As average CPU below 50%

Explanation

Error budgets balance reliability and change: when the budget is spent, focus shifts to stability.

Further reading

Test yourself

Take the API Design · Senior quiz: questions and options are shuffled, and you get a review of your mistakes at the end.