Lockbox - API Key Vault is a free Chrome add-on designed to manage and securely store API keys. This tool allows users to access, copy, and auto-fill their API keys seamlessly from their browser toolbar, eliminating the need to switch between multiple tabs. It offers instant search capabilities, enabling users to find any key across all vaults quickly. Additionally, it includes a context menu feature for easy pasting of keys and an omnibox option for swift key retrieval by typing "lb" in the address bar.

One of the standout features of Lockbox is its auto-fill function, which detects API key input fields on popular developer platforms, streamlining the development process. Users are also notified of expiring keys through badge alerts. It's important to note that key values are not cached locally, ensuring enhanced security. To use Lockbox, users must create an account at the designated dashboard.