API (disambiguation)

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For information on Wikipedia APIs, see Wikipedia:Creating a bot#APIs for bots.

API, originally Advanced Programming Interface but now more commonly known by its near-synonym, Application programming interface, is any defined inter-program interface.

API or api may also refer to:

Companies and organizations[edit]





  • Active pharmaceutical ingredient, a basic component of any medicine or pharmaceutical drug
  • Petroleum industry nomenclature deriving from American Petroleum Institute;
    • API gravity, a measure of the density of petroleum.
    • API number, a unique identifier applied to each petroleum exploration or production well drilled in the United States.
    • API unit, a standard measure of natural gamma radiation measured in a borehole.
  • Analytical Profile Index, a miniaturized panel of biochemical tests compiled for identification of groups of closely related bacteria
  • API oil-water separator