API gateway middleware integration platform

I need a single-entry point gateway API which can consolidate Salesforce, ServiceNow, Azure, AWS, and one or two other REST API's into a single API which my team can expose to the rest of the enterprise for building reports, software delivery, alerting, and other business automation. Ideally, the gateway should feature auditing, data transformations, documentation, business logic, and some kind of scripting language (JS or Python are great; Java is not). Does anyone have ideas?