Flexport Common Errors Overview Quick reference for the most common Flexport API v2 errors. The API returns standard HTTP codes with JSON error bodies containing , , and sometimes fields. Error Reference 401 Unauthorized — Invalid or Missing API Key Causes: Missing header, expired JWT token, revoked API key. Fix: 403 Forbidden — Insufficient Permissions Causes: API key lacks required scope, IP whitelist blocking, sandbox key used on production. Fix: Check key permissions in Flexport Portal Settings Developer. Ensure key scope includes the endpoint you are calling. 404 Not Found — Resource Doe…