SaaS ↔ (model) service to provide (online cloud) Software access to customer

aka SaaS, Software-as-a-Service

References

1. github ↔ MS online Git Repo SaaS

2. Stripe ↔ Payment RESTful API SaaS

3. Algolia ↔ $$$ Online API Search Engine Proprietary SaaS Host & Analytics via RESTful API - $$$ charge by ANY operation or # records ☠

4. Online API ↔ Software to expose access to remote Web Service/SaaS