HMRC API Functionality

Hi All

Looking for some guidance/advice to see if anyone has used the HMRC API?

We are looking for options around our Free School Meals / Clothing Grant and I had noticed that the HMRC API might allow us to use the responses to form a decision around these.

Link to API Example: Individual Income - HMRC Developer Hub - GOV.UK

Just curious to see if anyone else has used this or considered using this?