GraphQL Request Override (GROE)

About

GROE - GraphQL Request Override Extension

Mock and test GraphQL APIs directly in your browser - zero code changes required.

🚀 KEY FEATURES

• Mock Mode: Block requests and return fake data instantly
• Override Mode: Merge mock data into real API responses (unique!)
• Variable Conditions: Match rules based on GraphQL variable values
• Query Rewriting: Test new fields before backend implements them
• Batch Request Support: Handle multiple operations individually
• Priority System: Control which rule wins when multiple match
• Groups & Organization: Toggle entire test scenarios on/off
• Import/Export: Share rules with your team via JSON files

✨ WHY USE GROE?

Frontend Development
→ Build features before the API is ready
→ Test with specific data states instantly
→ No waiting for backend team

QA Testing
→ Test empty states, error flows, edge cases
→ Simulate slow responses and timeouts
→ Reproduce production bugs easily

Demo Preparation
→ Replace real customer data with demo-safe data
→ Show features that aren't in production yet
→ Works seamlessly on live production sites

🎯 UNIQUE ADVANTAGES

Unlike Postman mock servers or code-based mocks (MSW):
✓ Zero setup - install and go
✓ Works on production sites without modifications
✓ Override mode: merge real + mock data (impossible with other tools)
✓ No proxy configuration needed
✓ Non-developers can create and manage rules
✓ Instant on/off toggle

🔒 SECURE & PRIVATE

• All data stored locally on your device
• No external network requests
• No cloud sync or data sharing
• Open source and auditable

📊 PERFORMANCE

• ~2ms overhead per request (imperceptible)
• Only inspects GraphQL POST requests
• Zero impact on GET requests
• Smart caching and early exit optimization

🛠️ PERFECT FOR

• Frontend developers working on GraphQL apps
• QA engineers testing UI edge cases
• Product managers preparing demos
• Teams using Apollo Client, Relay, or any GraphQL client

💡 EXAMPLE USE CASES

→ Test checkout flow with various cart states
→ Reproduce "crash with 100+ notifications" bug
→ Demo premium features before deployment
→ Test loading states with 5-second delays
→ Simulate authentication errors
→ Add feature flags without backend changes

No code changes. No infrastructure. Just install and start mocking.

Perfect for React, Vue, Angular, Next.js, or any web app using GraphQL.