QGIS
Accessing OS Maps API via QGIS
QGIS is an open GIS (Geospatial Information System) desktop application that allows you to display, interrogate, visualise and create geospatial information including from geo-centric APIs (for example, a Service).
What you need
OS Maps API added to an API project in the OS Data Hub with an API Key. See Getting started with an API project for more information.
QGIS version 3.22.0 or later
Instructions
Create a new connection
In the Data Source Manager | WMS/WMTS dialog:
Click New.

In the Create a New WMS/WMTS Connection dialog:
Name: Provide a name for the API.
URL: Copy your OS Maps API WMTS endpoint address from the OS Data Hub and paste it into this field. Your API Key is automatically added to the URL in the
key
parameter.Authentication: You can ignore these options. It is not necessary to enter your username and password to use the service as as all authentication is done through your Project key.
Other fields: Leave the rest of the fields as they are.
Click OK.

Add Layer
In the Data Source Manager | WMS/WMTS dialog,
Select your new connection in the dropdown.
Click Connect.
Select your preferred tileset.
Click Add and then Close to close the dialog.

The layer will then display in the Layers panel and the data will display on the map:

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