5 REST API Mistakes That Cost Me Users — and How to Fix Them

Short summary

REST API design mistakes—always returning HTTP 200, missing versioning, lacking rate limiting, inconsistent errors, and no pagination—drive user churn. Author demonstrates fixes (proper status codes, /v1/ prefixing, token-bucket rate limiting, standard error shapes, cursor pagination) that reduced integration time from 3 days to 4 hours and dropped support tickets 70%. Well-designed APIs are as critical to product success as beautiful frontends.

• •Use proper HTTP status codes (401, 404, 422, 429) instead of 200 for all responses
• •Version endpoints with /v1/ prefix for backward compatibility when evolving APIs
• •Implement rate limiting and cursor-based pagination to prevent cascade failures and excessive payloads

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