I can now share an article directly from my feed reader to my Hypothes.is account, annotated with a few remarks.

One of the things I often do when feed reading is opening some articles up in the browser with the purpose of possibly saving them to Hypothes.is for (later) annotation. You know how it goes with open tabs in browsers, hundreds will be opened up and then neglected, until you give up and quite the entire session.

My annotation of things I read starts with saving the article to Hypothes.is, and provide a single annotation for the entire page that includes a web archive link to the article and a brief motivation or some first thoughts about why I think it is of interest to me. Later I may go through the article in more detail and add more annotations, which end up in my notes. (I also do this outside of Hypothes.is, saving an entire article directly to my notes in markdown, when I don’t want to read the article in browser.)

Until now this forces me to leave my feed reader to store an article in Hypothes.is. However, in my personal feed reader I have already the opportunity to post directly from there to my websites or to my personal notes collection in Obsidian.
Hypothes.is has an API, which much like how I post to my sites from my feed reader can make it possible to directly share to Hypothes.is from inside my feed reader. This way I can continue to read, while leaving breadcrumbs in Hypothes.is (which always also end up in the inbox of my notes).

The Hypothes.is API is documented and expects JSON payloads. To read public material through the API is possible for anyone, to post you need an API key that is connected to your account (find it when logged in).

I use JSON payloads to post from my feedreader (and from inside my notes) to this site, so I copied and adapted the script to talk to the Hypotes.is API.
The result is an extremely basic and barebones script that can do only a single thing: post a page wide annotation (so no highlights, no updates etc). For now this is enough as it is precisely my usual starting point for annotation.

The script expects to receive 4 things: a URL, the title of the article, an array of tags, and my remarks. That is sent to the Hypothes.is API. In response I will get the information about the annotation I just made (ID etc.) but I disregard any response.

To the webform I use in my feedreader I added an option to send the information to Hypothes.is, rather than my websites through MicroPub, or my local notes through the filesystem. That option is what ensures the little script gets called with the right variables.

It now looks like this:

In my feed reader I have the usual form I use to post replies and bookmarks, now with an additional radio button to select ‘H.’ for Hypothes.is

Submitting the form above gets it posted to my Hypothes.is account