Chat, MCP and the API reach the same data. Pick the one that fits how you work.
| Chat | MCP | API | |
|---|---|---|---|
| Works in | Your browser | Claude, ChatGPT or your own harness | Your own code |
| You need | Nothing | Sign-in, or an API key | An API key |
| AI credits | Used | Not used | Not used |
| Good for | Trying Watt and quick answers | Working Watt into the tools you use | Building Watt into your product |
Start with Chat if you're new. Your plan covers all three, so you can add the others later.