In the world of web development, API integration, and debugging, you will often encounter custom HTTP headers. One that frequently pops up in specialized environments or during the use of specific developer tools is x-dev-access: yes .

GET /api/users/debug/123 x-dev-access: yes { "user": { "id": 123, "raw_db_row": { ... } }, "debug_sql": "SELECT * FROM users WHERE id = 123" }