Replit
auth
OAuth Setup Failing on Replit
OAuth providers reject your Replit application with invalid redirect URI or misconfigured credentials. Your login flow fails when redirecting back from the OAuth provider.
This commonly happens when the redirect URI registered with the OAuth provider doesn't match your Replit deployment domain or when environment variables are missing.
Error Messages You Might See
error_description: invalid_redirect_uri
Invalid redirect_uri parameter
The redirect_uri MUST match the registered redirect_uri
Common Causes
- Redirect URI mismatch between OAuth provider config and Replit domain
- Missing or incorrect environment variables (CLIENT_ID, CLIENT_SECRET)
- Using localhost instead of Replit production domain in OAuth settings
- OAuth provider not whitelisting Replit's deployment domains
- Replit URL includes .replit.dev but provider expects just domain
How to Fix It
Verify your OAuth provider settings match your Replit deployment URL exactly (e.g., https://myapp-username.replit.dev). Check that CLIENT_ID and CLIENT_SECRET are set in Replit Secrets. Some providers require explicit https:// and trailing slash consistency.
Real developers can help you.
Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
Milan Surelia
Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems.
Expertise:
💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web.
🖋️ Sharing insights through technical writing, blogging, and open-source contributions.
🤝 Collaborating closely with designers, PMs, and developers to build seamless mobile experiences.
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🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX.
🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development.
🌟 Open source contributions on Github & StackOverflow for Flutter & Dart
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Milan is always happy to connect, work on new ideas, and explore the latest in technology.
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Sage Fulcher
Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them)
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🚀 Leadership: Managing and coaching teams of 15+ engineers, fostering a culture of accountability and continuous improvement.
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I thrive on "out-of-the-box" thinking to solve complex technical bottlenecks and am always looking for ways to use automation to improve business productivity.
Dor Yaloz
SW engineer with 6+ years of experience,
I worked with React/Node/Python
did projects with React+Capacitor.js for ios
Supabase expert
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Get HelpFrequently Asked Questions
How do I find my Replit deployment URL?
Click 'Deploy' in Replit, your URL is shown as https://your-project-username.replit.dev
Where do I set CLIENT_ID and CLIENT_SECRET?
Use the Secrets panel (lock icon) in Replit to add environment variables
Can I test locally before deploying?
Use localhost:3000 for local testing, but update OAuth provider settings before production