Technical queries

Questions about how MapIt works, or the data? Drop a line to

Terms of usage

Low volume, charitable use of the API is free. This means direct use by registered charities, or individuals pursuing a non–profit project on an unpaid basis, with a volume of up to 50,000 calls per year. All other use requires a licence, as a contribution towards the costs of providing this service. Please email us at if your usage is likely to fall into the non–free bracket: unlicensed users may be blocked without warning.


£500 per year for up to 50,000 calls (free for charitable usage)
£1000 per year for up to 100,000 calls
£2000 per year for up to 200,000 calls
£2500 per year for up to 300,000 calls
£3000 per year for up to 500,000 calls
More than 500,000 calls, get in touch

In addition, we offer a 50% discount on the above rates for charitable usage.


Please attribute us with the text “Powered by Mapit” and a link back to the MapIt front page.

Rate limiting

The standard paid service is limited to an average of 1 call per second in a rolling 3 minute period. If you need more than this, we can set you up a dedicated service. Please get in touch.

Self–installed versions of MapIt

Some organisations prefer to install their own internal version on MapIt. We are happy to help with this. Depending on your needs, we can advise your technical team on how to do this, or our developers can install it for you (for a fee).

One–off data range searches

We also offer one–off look–ups for large data sets – this is useful when you don’t need to use the API but simply have data that you need matched (e.g. a list of postcodes to match to the constituencies they fall into). We can do this for you – ask us for a quote.

Geometry files

If you need to use the API to download the MapIt geometry files, you can do so for free for up to 50,000 files if you are a registered UK charity or an individual working on a non–profit project. If you are not, or need more than 50,000 files, we can licence them to you.

For all enquiries about licensing, please drop us a line with some information about what you’re looking to do, and we’ll get in touch to discuss how we can help you.