You copied the key in, but as soon as you run it you get 401, invalid_api_key, or “API key error”? Don’t doubt your life choices—I've stepped on these issues way too many times. In many cases it’s not that the “key is wrong,” but that it’s being used wrong.
The 3 most common pitfalls
Copying with extra spaces or newlines
When you copy the key from the dashboard, it’s easy to accidentally include a trailing space/line break. Paste the key into plain text once, then paste it back—your success rate will visibly improve.
Using the wrong platform or the wrong permissions
A ChatGPT account is not the same as an OpenAI API account; the same goes for Claude and Gemini—being able to use the chat product doesn’t mean the API will work. Make sure you created the key in the correct console, and that the project, billing, and quota are enabled.
Environment variables not taking effect
Many errors happen because “the program never read the key at all.” Check that you’re using the correct variable name, restart the terminal/service and try again; for Node projects, don’t forget to load dotenv.
Connection issues can also masquerade as key errors
When the network is blocked, the proxy is unstable, or DNS is acting up, libraries may throw an error that looks like “auth failed.” You can follow common troubleshooting steps: switch networks, disable unnecessary proxies, and use curl to test API connectivity.
Why Midjourney can also make you think it’s a key problem
Midjourney is mainly used in Discord; more often it’s channel permissions, command format, or the bot being unavailable that makes it look like “no permission.” Don’t fixate on an API key—first check whether you’re in the right channel and whether you have a subscription and usage permissions.
My own small suggestion
If you’re integrating ChatGPT, Claude, and Gemini at the same time, consider putting the keys into a unified secrets manager or gateway (e.g., an open-source gateway approach that supports multiple models) to reduce low-level mistakes like “pasting the wrong key.”
If you’re still stuck on annoyances like subscriptions, networking, or tool integration, take a look around Titikey—many common pitfalls already have ready-made solution paths.
