How I Went from 0% to 100% API Test Coverage in Minutes Using Keploy

Ashish Singh — Fri, 27 Jun 2025 19:57:30 +0000

🔍 Day 4 of My API Testing Journey — Manual to AI in No Time
As a backend developer, writing APIs is exciting. But testing them manually? Not so much. Writing, mocking, asserting — it's time-consuming and error-prone.

Then I found Keploy – an open-source, AI-powered API testing toolkit. It changed my workflow overnight! 💥

🔧 What I Built
✅ Book Management API using Node.js + Express + MongoDB
✅ Created an OpenAPI Schema
✅ Tested using Keploy CLI
✅ Used Keploy Chrome Extension for real-world testing
✅ Integrated with GitHub Actions for automated CI testing
✅ Achieved 100% test suite coverage with smart mocking 🧠

📊 My Keploy Test Report

🔄 160 Test Suites

✅ 95 Accepted

❌ 65 Rejected

This was done without writing a single line of manual tests! 🤯

🌐 Real-World API Testing
I tested public APIs with the Keploy Chrome Extension:

🔸 openweathermap.org – real-time weather data
🔸 fakestoreapi.com – eCommerce product listings

Keploy captured the API traffic and converted it into reusable, replayable test cases — no mocks or scripts needed.

⚙️ Why Keploy is a Game-Changer
Manual Testing Keploy AI Testing
❌ Write tests manually ✅ Auto-generated from traffic
❌ Mock DB/API manually ✅ Auto-mocked
❌ Tedious CI setup ✅ Simple GitHub Action
❌ Missed edge cases ✅ Smart assertions included

Keploy eliminated repetitive test writing and focused on real usage-based testing. It’s like having an AI test co-pilot.

🔨 Tools & Stack I Used
Node.js + Express

MongoDB

Keploy CLI + Agent

Keploy Chrome Extension

GitHub Actions (CI/CD)

OpenAPI & curl

📂 Project Resources
🔗 GitHub Repo: Drashish987/Api-testing-

📄 OpenAPI Schema: openapi.yaml

⚙️ CI/CD Workflow: keploy.yml

🧠 What I Learned
Test coverage doesn’t have to be hard

AI tools like Keploy save time and effort

Testing with real traffic is more reliable than mocks

GitHub Actions + Keploy is a perfect CI combo

💬 Final Thoughts
Thanks to Keploy, I finally enjoyed API testing 😄
It made testing feel like a natural part of building, not a separate, frustrating chore.

If you build APIs, try Keploy. Trust me, you’ll never go back to writing tests manually.

DEV Community: Ashish Singh

How I Went from 0% to 100% API Test Coverage in Minutes Using Keploy