APIs

Lesson in the Backend Developer Roadmap · Stage 7: Learn about APIs

Last updated 14 September 2026

What is APIs?

API (Application Programming Interface) defines rules and protocols for software applications to communicate. Provides standardized access to functionalities without understanding internal workings. Includes endpoints, request methods (GET, POST, PUT), and data formats (JSON, XML).

Study this in the interactive course See the whole Backend roadmap

Free resources to learn APIs

RoadmapVisit the Dedicated API Design Roadmap
RoadmapVisit the Dedicated API Security Best Practices
ArticleWhat is an API?
VideoWhat is an API (in 5 minutes)

APIs: common questions

Can I learn APIs in Hindi?

This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain APIs in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.

Is this APIs tutorial for beginners?

It is lesson 34 of 155 in the free Backend roadmap, in stage 7, Learn about APIs. If you are new to Backend, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.