In practice a REST API is a list of URLs and documented fields. The quality is in versioning, auth, and what happens when something fails — not in whether someone used the word REST in a slide.
See also API and microservices.
REST API
Definition LavisTech · · 1 min read
Quick answer
REST is a convention for APIs on the web: each important thing — a customer, an invoice, an order — has an address, and you use standard HTTP actions to read or update it. It is popular because it is simple to call from any language and easy to log. It is not magic, and it is a poor fit if you need one query that spans twenty resources at once — that is where people start talking about GraphQL or a purpose-built report endpoint.
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