# Getting started

This guide explains how to integrate with the OS Features API in various open GIS (Geospatial Information System) software applications.

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If you are not familiar with the OS Features API please read the [overview documentation](https://docs.os.uk/os-apis/accessing-os-apis/os-features-api) before proceeding.
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## What you need?

* One of the GIS software applications listed below
* OS Features API URL and key; see [getting-started-with-an-api-project](https://docs.os.uk/os-apis/core-concepts/getting-started-with-an-api-project "mention") for more information

## Instructions

You can use any of the applications listed below to integrate with the OS Features API. Click a link to open the instructions on how to integrate with the OS Features API service for each application.

* [arcgis-online](https://docs.os.uk/os-apis/accessing-os-apis/os-features-api/getting-started/arcgis-online "mention")
* [arcgis-pro](https://docs.os.uk/os-apis/accessing-os-apis/os-features-api/getting-started/arcgis-pro "mention")
* [arcmap](https://docs.os.uk/os-apis/accessing-os-apis/os-features-api/getting-started/arcmap "mention")
* [cadcorp-sis](https://docs.os.uk/os-apis/accessing-os-apis/os-features-api/getting-started/cadcorp-sis "mention")
* [mapinfo-pro](https://docs.os.uk/os-apis/accessing-os-apis/os-features-api/getting-started/mapinfo-pro "mention")
* [qgis](https://docs.os.uk/os-apis/accessing-os-apis/os-features-api/getting-started/qgis "mention")

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When using a Premium Plan, it's best not to select a lot of features or a large geographic area in your GIS software as this can easily use up API transactions.
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