Quantra is a JSON API wrap for QuantLib. Its aim is creating a simple interface for QuantLib functionalities making its integration with other systems easier.
An online version of the API is available, visit the API docs section to see what can be done with it. The API can also be built from the sources and executed locally.
Two clients for quantra: Google sheets and a web application
These are a couple of examples of what can be done with an API based on QuantLib:
A set of Google Sheets scripts that use the online API and hence make some QuantLib functionalities usable from a spreadsheet are available at GitHub.
A user friendly front end for QuantLib implemented as a web application. This is a React-Redux application that uses Postgres and PostgREST as a database and to communicate with the client.
Implemented by Josep Rubió Piqué.