Chime provides an extension for both Chrome and Firefox that allows insertion of a justchimein.com meeting link directly into your Google Calendar invites. It’s available on the Firefox and Chrome stores at the links below.
For example, once the Chrome extension has been added, simply click on the 'Add Chime Meeting' button with a new or existing calendar invitation to add a meeting link. Here's a sample screenshot.
Chrome extension for adding a Chime meeting link to a calendar invitation
Chrome Store: https://chrome.google.com/webstore/detail/chime-by-cafex-google-cal/dmffkichpjilgkjjpmlhjagiahlkbemj