The following application that is web-based interface (API) standards guidance may help your organisation provide the best possible services to users.
API technical and data standards (v2 - 2019)
Publish your APIs over the internet by default. Email firstname.lastname@example.org if you believe your APIs should not be published over public infrastructure.
Proceed with the Technology Code of Practice
Make fully sure your APIs match the requirements of the Technology Code of Practice (TCoP) by making sure they:
stick to the Open Standards Principles of open access, consensus-based open process and royalty-free licensing