API Debug Workflow Pack

A task-oriented tool pack for real production debugging: 415, CORS, cookies, JWT, and payload issues.

Jump To Common Incidents

415 Unsupported Media Type

Header/body media type mismatch

CORS Credentials + *

Credentialed CORS blocked by wildcard origin

SameSite=None + Secure

Cross-site cookie dropped by browser policy

1) Shape Request Inputs

Normalize URL, query params, and raw request before touching server behavior.

URL Parser/tools/url-parserURL Query Cleaner/tools/url-query-cleanerHTTP Request Builder/tools/http-request-builder

2) Validate Protocol Contracts

Check headers, CORS, and cookie policy consistency across gateway and app.

Content-Type Parser/tools/content-type-parserCORS Header Generator/tools/cors-header-generatorSet-Cookie Parser/tools/set-cookie-parserHTTP Headers Parser/tools/http-headers-parser

3) Inspect Auth and Payload

Decode token and payload to isolate claim, encoding, or formatting problems.

JWT Decoder/tools/jwt-decoderBase64 Encode/Decode/tools/base64JSON Formatter/tools/json-formatter