Guides
Practical playbooks for retiring API versions, telling consumers what's changing, and rotating credentials. Each one works whether or not you use EndPointBlank.
A step-by-step playbook for retiring an old API version: find who still calls it, announce it in the response, send reminders, and retire on evidence.
Build a list of every client still calling your old API version, with call counts and last-seen times, before you retire it.
The Deprecation (RFC 9745) and Sunset (RFC 8594) HTTP headers: exact syntax, common mistakes, and code for Rails, Express, Phoenix, FastAPI and Spring.
A copy-and-edit API deprecation policy: notice periods, how consumers are told, support for deprecated versions, extensions, and what happens after retirement.
Five copy-and-edit emails for retiring an API version: the announcement, reminders 30, 7 and 1 day out, and the day after.
Rotate API client secrets with an overlap window, so callers switch on their own schedule: the steps, server-side code, and the pitfalls.
Why a retired API endpoint should return 410 Gone, not 404, what the response body should say, and code for Express and Phoenix.
How the common API versioning schemes compare, which to pick for a public API, when a change deserves a new version, and how to plan retiring the old one.
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