How to Deploy a FastAPI App on Replit

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This tutorial shows how to deploy your FastAPI app on Replit so it runs continuously in the cloud on a public URL.

Notes:

• You need a Replit account and a working FastAPI project. 
• Deployments require a paid Replit plan. Confirm your account has Deployments access before starting.
• Make sure your app runs correctly in the workspace before deploying. Review your run command - for example, uvicorn main:app --host 0.0.0.0 --port 8080. Replit usually detects this automatically from your project.
• Deployments are now called Publishing.
  

1. Sign in at replit.com and open your FastAPI project from the dashboard.
2. In your workspace, click New Tab and select Publishing (previously called Deployments). The Publishing panel opens.
3. Click Adjust Settings to choose a deployment type.
   
   • Autoscale for APIs that need to scale with traffic
   • Reserved VM for a dedicated, always-on environment.
4. Click Publish. Replit builds your project and deploys it to a replit.app subdomain. This typically takes one to two minutes.
5. When deployment completes, check for a green status indicator in the Published panel. Click the generated URL to confirm your FastAPI app is live. Append /docs to the URL to access the automatic API documentation.