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What Does Difficulty Mean?​

The API is assigned a difficulty from the following buckets: Very Easy, Easy, Medium, Hard, and Very Hard. The difficulty is computed as a function of the number of operations, schemas, and parameters of the API, relative to the other APIs in Konfig's database. More difficult APIs can be expected to have a large number of operations, schemas, and/or parameters. The number of operations, schemas, and parameters are weighted and summed. Then, the API's z-score (number of standard deviations above/below the mean) is calculated. The API is bucketed according to the z-score thresholds of each bucket.

Example​

Let us consider an API with 15 operations, 16 schemas, and 20 parameters.

Example calculation

Visualization​

Below is a histogram of all of the difficulty scores of the APIs in our database. Approximate bucket margins are drawn below the x-axis.

Difficulty score histogram