The on-line API documentation explains the data that modules expect and return on their APIs.

To connect to the APIs there are several software options:

curl

The Okapi Guide has detailed examples and explanations how to use APIs with command-line tool curl.

Okapi CLI

The okapi-cli is a command-line interface written in Java.

OkapiClient

The OkapiCLI.py is a command-line interface written in Python.

Stripes CLI

The stripes-cli is a command-line interface written in JavaScript that can connect to back-end APIs and help front-end developers that use FOLIO’s User Interface framework Stripes.

Postman

The folio-api-tests Github repository contains Postman collections for the APIs of some FOLIO modules. Use them with Postman or Newman. Get help in the FOLIO Slack #postman channel.