Would you use different standalone web/api based services?

hello everybody! I'm a long time lurker but decided to finally properly join the community.

We have a standardised interface which provides various services for internal purposes and are thinking about opening them up so they can be utilised by others.

So, we'd provide a standardised interface & API which you call to use a given service. Random examples might include:

• exchange rates for a give pair of currencies (you provide date, currency, required format - json, csv, array etc. - and receive back date, rate, status etc.)
• images to animated gif transformation (you provide a collection of images and parameters and receive back an animated gif)
• data transformation (you provide string of characters to be transformed, parameters etc. and receive back the results)
• simple javascript apps (you put a js code snippet on your site and are up and running quickly with a simple app like messenger, counter etc.)

This are just examples to illustrate the concept. The idea is that there are tools which obviously exist elsewhere but what we have is a standard method of querying the service provider, unified response methodology & format and also new services can be added pretty quickly so overall it speeds up development work and reduces number of external services that are used.

You can think about it as a toolbox.

The ultimate question is - will you be interested in using proposition like this?

What services would be useful to you and sort of "I'm signing up if it's there!"?

What are other providers who provide something similar?