Qonto provides 2 collections of REST APIs and a Sandbox environment to help you build integrations on top of Qonto accounts, transactions, memberships, etc; no matter what your use case is.JSON is returned in all API responses, including errors. All API requests must be made over HTTPS. Calls made over plain HTTP will fail.
To access your Qonto business features remotely, use the Business API with:
OAuth 2.0 if you need to perform sensitive actions (cf. the endpoints access table to identify if you need to use an endpoint which is only accessible through OAuth) OR if you want to restrict the scopes accessible with your authentication credentials to a specific list of scopes;