API Ratings: Performance
For our API ratings, we look at over 100 APIs and pull all the metrics together to give you a general feeling for the service quality for an organization’s APIs in a particular API ratings category with our patented CASC score.
Something of interest
Social Networks is a pretty competitive API ratings category and a good example of where all APIs should be! If all the Social Networks APIs can do it, other APIs can do it too. 
All of the APIs are very firmly in the Green Zone, and 8 out of the 10 of them have a CASC score over 9.00. LinkedIn might be propping up the API ratings category, but is still one of only two APIs to manage a 100% pass rate. It is let down by being somewhat slow, but mostly having a lot of outliers at 4.97%. There is no direct correlation between being slow and having a lot of outliers. A slower API can be just as reliable as faster. Etsy has an excellent CASC score of 9.36 despite being the slowest API in the category by over 300 ms with a median latency of 804 ms. Etsy has a 100% pass rate and 0.74% outliers, the third-best in the overall API ratings category. 
Now, an interesting thing is how fast Etsy is depends a lot on where you are calling from, and Etsy is fastest from AWS Oceania. That strongly suggests that Etsy has a host on AWS Oceania and probably in AWS East Asia, South America and South Asia (AWS South America is the second fastest location). In Europe though, AWS is the third-slowest cloud, only 2 ms behind the overall slowest. So there is plenty to chew on for Etsy here. Yes, they have a very solid API, but it could be truly Best in Breed if they could sprinkle some of that AWS Oceania and South America over the other locations.
API Ratings: Overall Quality
Week Ending 30 November 2020
Category
Organization
CASC score
Corporate Infrastructure
GitHub
9.58
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