https://www.census.gov/data/developers/guidance/microdata-api-user-guide.html
Census Microdata API User Guide
This user guide provides an overview of the U.S. Census Bureau’s microdata application programming interface (API) and walks through how to make queries.
api user guidecensusmicrodata
https://www.census.gov/data/developers/guidance/api-user-guide.html
Census Data API User Guide
This user guide instructs developers and researchers on how to use the Census Data API to request data from U.S. Census Bureau datasets.
api user guidecensus data
https://matomo.org/guide/apis/analytics-api/
Analytics API User Guide - APIs - Matomo Analytics
Apr 4, 2022 - Learn more in the Matomo API documentation pages: * **** * **** Lists of all Piwik API functions, list of standard and optional parameters, and more *
api user guideanalyticsapismatomo
https://matomo.org/guide/apis/tracking-api/
Tracking API User Guide - APIs - Matomo Analytics
api user guidematomo analyticstrackingapis
https://docs.kernel.org/userspace-api/index.html
The Linux kernel user-space API guide — The Linux Kernel documentation
the linux kerneluser spaceapi guidedocumentation
https://packaging.python.org/en/latest/specifications/simple-repository-api/
Simple repository API - Python Packaging User Guide
user guidesimplerepositoryapipython