API debugging
How to debug an invalid JSON API response
Find why an API response cannot be parsed as JSON, distinguish syntax errors from HTTP failures, and reproduce the fix with small examples.
Read the worked guide →Practical developer guides
For developers debugging APIs, converting data and working with AI coding assistants. Each guide explains a concrete task, a reproducible example and the limits of the approach.
API authentication
JWT decoding vs verification: debug a token safely
Understand the difference between reading JWT claims and verifying a signature, with a practical checklist for API authentication failures.
Read the worked guide →Data conversion
Convert JSON to CSV without silently losing fields
Handle inconsistent JSON fields, commas, quotes, nested values and spreadsheet formulas when exporting API records as CSV.
Read the worked guide →AI development
Write AI coding prompts you can verify
Give an AI assistant a reproducible coding task, concrete constraints and acceptance criteria, then evaluate its answer with meaningful tests.
Read the worked guide →API debugging
Debug URL query parameters: spaces, repeated keys and relative paths
Reproduce query-string bugs caused by plus signs, duplicate keys, double encoding and relative URL resolution before changing your API client.
Read the worked guide →API testing
Compare API JSON fixtures without confusing formatting with behavior
Review meaningful changes in API response fixtures using structural JSON diffs, normalization rules and explicit contract assertions.
Read the worked guide →Text and validation
Test JavaScript regex validation with captures, Unicode and failure cases
Build a small regex test matrix, inspect capture groups, avoid substring validation mistakes and check expensive patterns without freezing a page.
Read the worked guide →AI code review
Review an AI-generated Laravel change before accepting it
Work through a Laravel revision that removes validation and authorization, then turn the diff into concrete request and permission regression tests.
Read the worked guide →