LeetCode Sync Extension

Fetch LeetCode problem data using local LEETCODE_SESSION cookie and return it to external pages.

There are many third-party websites that provide ratings or scores for Leetcode problems, a feature that is not available on the official website. Over the past few years, the overall difficulty of Leetcode problems has been increasing, making the difficulty tags less effective in reflecting the actual challenge level of a problem. As a result, third-party websites play an important role in assisting with problem-solving. You can access Leetcode’s API via GraphQL to retrieve the problem list, but you cannot obtain the problem status (e.g., not attempted, attempted, or accepted). This extension is designed to use the Leetcode token stored in your Chrome browser’s cookies to access Leetcode’s API for retrieving the full problem dataset. By default, this API can be accessed without a token, but in that case, the problem details will not include the status (e.g., not attempted, attempted, accepted). However, when accessed with a token, the API provides problem status data. With this extension, users can sync their problem status data with third-party websites after logging into Leetcode. This data is stored locally in the browser’s local storage and is not collected by the extension. This allows users to efficiently utilize third-party platforms for training. To address security and privacy concerns, the token is never directly shared. Instead, the extension makes API calls internally and sends only the necessary problem data back to the third-party website. This data is not sensitive—it simply grants access to problem statuses, improving the user’s training experience.