How can I debug this error when the JSON data comes from an API?

First, log the raw string you're receiving from the API *before* attempting to parse it with `JSON.parse()`. This allows you to inspect the actual data. Use your browser's developer tools or `console.log()` in Node.js. Check for HTML error messages, unexpected characters, or incomplete JSON structures. Also, verify the API is actually returning JSON with the correct `Content-Type` header (application/json).