I have just released version 1.1.0 of the plugin. The changes in this release are:
- New: Add id_from_url for pasting URL and getting an identifier
- Fix: Change from HTTP POST to GET
The first item is for a change I made to the metadata editor that has been released in calibre version 3.34. When you press the button next to the identifiers field, if there is a URL in the clipboard, then it will attempt to get an identifier from the URL. That function needs support from the metadata source plugins.