You'll need to be authenticated as a user before fetching any posts.

There are two kinds of feeds: the home feed, which mixes posts from every group the user is in, and group feeds, which only show posts from one group.

Home feed

The home feed can be sorted by "for_you", "hot", or "recent":

const feed = await API.getHomeFeed("for_you");

The official YikYak app also passes the ID of the user's school group as the second parameter. That's the group with a group_join_type of "email_domain", which you can find with getGroups().

Not everything in the home feed is a post. Each item in feed.feed_items has an item_type, and some of them are things like group suggestions instead of posts. If you only care about posts, filter the rest out:

const posts = feed.feed_items.filter((i) => i.item_type == "post").map((i) => i.post);

Group feeds

Group feeds can be sorted by "hot", "recent", or "top":

const groupID = /* ID of a group */;
const { posts } = await API.getGroupPosts(groupID, "hot");

Top posts can also be narrowed down to a time period of "day", "week", "month", "year", or "all_time":

await API.getGroupPosts(groupID, "top", undefined, "week");

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Feeds come back one page at a time along with a cursor. To get the next page, pass that cursor back into the same function:

const firstPage = await API.getGroupPosts(groupID, "recent");
const secondPage = await API.getGroupPosts(groupID, "recent", firstPage.cursor);

The home feed (getHomeFeed) and activity (getActivity) work the same way.