Updates, API calls, records, and overages - Billing metrics for Stream Feeds

Monthly plans for the Stream Feeds product is billed based on three main metrics - Updates, API calls, and unique records that we store. Here is a quick breakdown of these. 

1. Updates

Updates are a unique concept to the Stream Feeds product that is related to the number of feeds that are "updated" for an action in the Feeds API. One example would be to consider adding a single activity to a feed that is followed by n other feeds. In the below example, feed A is followed by three other feeds, so the act of adding content to this feed constitutes 4 updates and 1 API call. 

2. API Calls

This is quite simply the process of making a request call to the Stream API. For example, to fetch a Feed in JavaScript, it would look like this

// not an API call
const feed = streamClient.feed("user", "steve");

// API call to fetch feeds content
const results = await feed.get();

3. Unique Records

Unique Records are calculated as the sum of Follows and Activities.

4. Concurrent Connections

Each feeds plan also includes an allocated number of concurrent connections. Although these aren't included in overages, if you are consistently exceeding this limit, you will be asked to upgrade your plan.