REST API
also REST
An interface style where you access and modify resources over HTTP using methods like GET, POST, PUT, and DELETE, typically exchanging JSON.
Analogy
Like a restaurant menu: standard requests get standard, predictable responses from the kitchen.
Why it matters
Most platform integrations and HTTP modules you build in n8n/Make/Zapier talk to REST APIs, so understanding them lets you connect to almost any service.
In practice
Calling GET https://api.example.com/contacts/123 to retrieve one contact as JSON.