API keys, one company at a time

Each page here walks through one company's website: where to click, which key to copy, and where to put it.

The steps are the same every time:

1. Create the key on the company's website. Most only show it once, so copy it right away.
2. Paste it into your .env file. See Env files if you don't have one yet.
3. If your project is on the internet, add the same name and key in your Vercel settings.
4. Tell your AI helper the key's name (like OPENAI_API_KEY), never the key itself.

1. company website
2. your .env file (and Vercel)
3. your project uses it

Only open the one your project asks for:

• Claude: if Claude Code asked you for an API key, or your project uses Claude
• OpenAI or Gemini: if your project uses ChatGPT's or Google's AI
• GitHub token: if GitHub asked for a password when saving
• Stripe: if your project takes payments
• Coinbase: if your project checks crypto prices or your account
• Discord: if you're building a Discord bot