Every OpenRouter error we see across thousands of AI agents routing through Manifest. 2 common errors, 150 affected teams in the last 30 days. Each one with what it means, how to fix it, and how Manifest routes around it.

OpenRouter fronts hundreds of upstream models, so its errors are often the upstream's errors passed through — a 429 or 5xx may come from the model's actual host rather than OpenRouter itself. Check the embedded upstream status before assuming your OpenRouter account is the problem.