API Style Guides

Working with several services becomes harder when each makes the same routine decisions differently. One might return order_id, another orderId, and a third place every result under data. If error responses also vary and each new endpoint reopens discussions about pagination and naming, clients spend time adapting to differences that rarely help them complete a task.

An API style guide records shared design decisions so teams can produce predictable interfaces.

This chapter explains how to scope a guide, write useful rules, connect them to examples and checks, and improve consistency without breaking existing clients.