Learn to create an open-source grammar correction API using Python in this 20-minute tutorial. Explore how to leverage Gramformer for grammar correction, FastAPI for building and serving the API, and ColabCode for hosting on Google Colab with ngrok. Follow along as the video guides you through introducing the necessary Python libraries, constructing a grammar correction script, developing the API, and demonstrating its functionality using Swagger UI. Access the provided Colab notebook to practice hands-on and dive deeper into the open-source alternatives to commercial grammar correction services.