This script will apply tags to items in bulk (e.g. from a search result)
Readwise Reader doesn't have a way to bulk tag items. This user script fixes that.
Install this user script.
You'll need Readwise API key (https://readwise.io/access_token). I had wanted it to work with the credentials while logged into the web app, but not all APIs accepted those credentials. I'm using a newer API for updating the tags.
Right click to find the context menu (e.g. via Tampermonkey menu) called Readwise Reader Bulk Tagger. Under there, select Change settings
That will show a page with an input field where you can paste the API key.
Security Note: This key will be saved in your local storage using the library https://github.com/sizzlemctwizzle/GM_config.
Let's say you want to tag a bunch of articles you forgot to tag or inconsistently tagged.
Browse to https://read.readwise.io and perform a search. If the articles from the search look like they should have the same tags, right click to access the Readwise Reader Bulk Tagger menu. Select Bulk apply tags.
This will show an input dialog where you can type one or more tags, separated by commas.
Once you apply the tags, wait a bit before leaving the page. The tags will be added asynchronously. It takes a while after the tags are added for the UI to be updated to show the new tags.