Task 6: Learn APIs and FastAPI

Issue Summary

Learn the basics of web APIs by working with a public API and building a simple API application using FastAPI. The task includes understanding API requests, responses, usage limits, and creating custom endpoints for handling simple data operations.

Problem Statement

Modern applications rely heavily on APIs for communication and data exchange. Beginners often lack practical experience in:

Using public APIs
Understanding API requests and responses
Creating backend APIs
Handling data through endpoints There is a need for a beginner-friendly task that introduces API concepts and backend development using FastAPI.

Proposed Solution

Develop small API-based applications to understand API usage and backend development. The task includes:

Using a public API such as the OpenWeather API to fetch weather data for a city.
Learning API concepts such as:
- GET requests
- POST requests
- JSON responses
- API rate limits and usage
Creating a simple API using FastAPI.

Features to Implement

Create a greeting API:

@app.get("/greet/{name}")
def greet(name: str):
    return {"greeting": f"Hello, {name}!"}

Build additional endpoints:

GET /villages
- Returns a list of village names
POST /add-village
- Adds a new village to an in-memory list

Test APIs using:

Browser
Postman
FastAPI Swagger UI

Expected Outcome

By completing this task, users will:

Understand how APIs work
Learn how to consume public APIs
Build and test APIs using FastAPI
Gain basic backend development knowledge
Understand request-response architecture

Technologies Suggested

Python
FastAPI
OpenWeather API
Postman
Uvicorn

Acceptance Criteria

Public API integration works successfully
Weather data can be fetched for a city
Greeting API endpoint functions correctly
Village list API endpoints work as expected
API responses return proper JSON format
APIs are tested successfully using Swagger UI or Postman
Code is clean and properly documented

Edited May 10, 2026 by Vemuri priya