I am getting model not found, unauthorized, or similar API errors. Where should I look first?

Start with the basics: correct key, correct base URL, correct model ID, and a minimal test request. Most integration failures look mysterious at first but are actually one of those four configuration mistakes.

• Use the matching reference page Open the linked docs or trust page below instead of guessing the next step from memory.
• Keep the order number if payment or delivery is involved That is the fastest way for support to trace what happened without asking you to repeat the whole story.
• Escalate early if the answer does not match your live case If your real order, setup, or delivery state looks different, switch to support quickly instead of waiting for the issue to compound.