Companies House API Issues

When creating your app did you specify that you wanted a live app? The test / sandbox mode may not work correctly.

Depending on how you’re requesting data from Companies House you need to register your IP or the host name (if you’re using a javascript-style request). This should be done where you’ve registered your app.

If you are just using a localhost set up rather than e.g. a fixed IP there is a workaround for that, see this thread:

If you are hosted on some environment with a range of host servers / IPs I think there’s a way to cover that but am not sure how. Search this forum / have a look at this thread:

Good luck.