You can use Google Apps Script to create custom scripts that interact with APIs and pull data into your Google Sheets. By utilizing the built-in `UrlFetchApp` class, you can make HTTP requests to APIs and parse the JSON or XML responses. Once the data is in your Google Sheet, you can apply various formulas and functions to perform desired analysis or build dynamic dashboards.

Another approach is to use the `IMPORTDATA` or `IMPORTJSON` functions within Google Sheets. These functions allow you to import data directly from a public API endpoint and keep it updated automatically. This eliminates the need for custom scripts and provides a simpler way to integrate API data into your Sheets.

If you're looking for a more advanced solution, you can try using Google Apps Script to develop a custom add-on for Google Sheets. This allows you to build a more tailored integration with an API, providing a user-friendly interface and automating complex workflows.