3 related posts
This topic page groups 3 posts around API Key, with coverage across Access and integration, Pricing and quotas and Guides, so you can jump straight to the right article for the task.
An OpenAI API key can be free to create, but backend API usage depends on billing, credits, model access, project permissions, usage limits, and rate limits. Separate ChatGPT app access, Platform API billing, provider routes, user-pays options, free-model alternatives, and unsafe copied keys before sending data.
Create a Gemini API key in Google AI Studio, then verify project ownership, region support, billing or free tier, model status, active limits, and key safety before your first request.
Complete guide to fixing Gemini API key invalid errors. Covers all error codes (400, 401, 403), environment variable issues, regional restrictions, and working Python/JavaScript validation code.
