This version is in beta - expect some breaking changes.

National Insurance Test Support API

Available in Sandbox Yes
Sandbox base URL https://test-api.service.hmrc.gov.uk
Available in Production No

Overview

Lets you set up test data for the National Insurance API.

Errors

Testing

Versioning

Endpoints

View API endpoints
Why do these endpoints look different?

The endpoints for this API now use the Open API Specification (OAS).

The API has not changed. You do not need to make any updates to your application if you already use this API.