World Bank Indicators API boundary

Evidence-backed facts

1. The Indicators API accepts both path-based and query-argument requests; the documentation shows equivalent low-income country queries using these two forms. informative
2. Date filters can select years, months, quarters or colon-separated ranges. Responses default to XML; format=json requests JSON. informative
3. The page parameter selects a result page and per_page sets its size; the documented default is 50 results per page. One page is not necessarily the whole result. informative
4. A multi-indicator request selects one source and separates indicator codes with semicolons. The documented limits are 60 indicators, 1500 characters per path segment and 4000 characters for the entire URL. informative

Primary sources