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Intercept and mock GraphQL responses by operation name, query pattern, and variable conditions — no backend changes required. 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.
Mar 24, 2026
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