17  Using APIs (todo)

Note

Proposed chapter scope: Getting data from web APIs with httr2. JSON responses motivate a proper explanation of lists and nested data, and turning them into data frames (unnest_wider, hoist). Pagination gives a natural use for while; error handling and rate limits give natural uses for if and possibly, building on the functions and map from Chapter 16.

Use APIs that send CORS headers so they work in webR (e.g. the Wikipedia API with origin=*), or fall back to recorded responses as in Chapter 11.