API Development Platform: Mock, Test & Version Your APIs
Transform G8KEPR into a complete API development platform with mock servers, contract testing, version management, and load testing - all integrated with your existing security rules. Perfect for teams building and maintaining multiple APIs.
🛠️ Development Platform
Mock Servers
Auto-generated from OpenAPI specs
Contract Testing
Validate backend matches spec
Version Management
Deprecation & migration tools
Load Testing
Realistic attack simulation
1. Mock Server Generation
Upload your OpenAPI spec and G8KEPR instantly generates a fully functional mock API with realistic data:
# Upload your OpenAPI spec
$ g8kepr mock create --spec openapi.yaml --name user-service
✓ Mock server created: https://mock-user-service.g8kepr.dev
✓ Endpoints generated: 23
✓ Example data seeded: 500 users, 1,200 posts
✓ Rate limiting applied: 100 req/min (from spec)
Available endpoints:
GET /users → List users (paginated)
GET /users/:id → Get user by ID
POST /users → Create user
PUT /users/:id → Update user
DELETE /users/:id → Delete user
Mock data examples:
User #1: {"id": 1, "name": "Alice Johnson", "email": "alice@example.com"}
User #2: {"id": 2, "name": "Bob Smith", "email": "bob@example.com"}
🔗 Share with frontend team: https://mock-user-service.g8kepr.devSmart Mock Data
G8KEPR analyzes your schema and generates realistic test data automatically:
| Field Type | Generated Data |
|---|---|
| alice.johnson@example.com | |
| phone_number | +1-555-123-4567 |
| credit_card | 4532-1234-5678-9010 (test card) |
| uuid | 550e8400-e29b-41d4-a716-446655440000 |
| date_of_birth | 1987-04-23 (random between 1950-2005) |
2. Contract Testing
Automatically verify your backend implementation matches the OpenAPI spec:
$ g8kepr test contract --spec openapi.yaml --base-url https://api.yourapp.com Running contract tests against https://api.yourapp.com... ✓ GET /users - Response matches schema (200 OK) ✓ GET /users/:id - Response matches schema (200 OK) ✗ POST /users - FAILED Expected: 201 Created Got: 200 OK Issue: Status code mismatch ✗ PUT /users/:id - FAILED Expected field: "updated_at" (datetime) Got: "updatedAt" (datetime) Issue: Field name casing mismatch (snake_case vs camelCase) ✓ DELETE /users/:id - Response matches schema (204 No Content) Results: 3 passed, 2 failed Coverage: 23/23 endpoints tested (100%)
3. API Versioning
Manage multiple API versions with deprecation warnings and automatic migration guides:
Version Timeline
Current (Stable)
Released: 2025-01-15 | 89% adoption
Deprecated (Sunset: 2025-12-31)
Released: 2024-03-10 | 11% adoption
Retired (Removed: 2025-06-01)
Released: 2023-01-05 | 0% adoption
Automatic deprecation warnings:
HTTP/1.1 200 OK Deprecation: true Sunset: Sat, 31 Dec 2025 00:00:00 GMT Link: <https://docs.g8kepr.com/migration/v2-to-v3>; rel="deprecation" X-API-Version: v2 X-API-Warn: "v2 will be removed on 2025-12-31. Migrate to v3."
4. Load Testing with Attack Simulation
Test your API's performance under realistic attack scenarios:
$ g8kepr load-test --spec openapi.yaml --duration 5m --scenario mixed-attack Starting load test with attack simulation... Scenario: Mixed Attack (70% normal, 20% SQLi, 10% XSS) Duration: 5 minutes Ramp-up: 30 seconds Target RPS: 1,000 [00:00:30] Ramping up... 500 RPS [00:01:00] ✓ Target reached: 1,000 RPS [00:02:00] 📊 Metrics: - Legitimate requests: 70% (200 OK) - SQL injection blocked: 20% (403 Forbidden) - XSS attempts blocked: 10% (403 Forbidden) - P50 latency: 12ms - P95 latency: 48ms - P99 latency: 127ms [00:05:00] Test complete! Results: Total requests: 300,000 Successful: 210,000 (70%) Blocked attacks: 90,000 (30%) False positives: 0 System remained stable: ✓ No 5xx errors: ✓ G8KEPR Security Performance: ✓ All SQLi attacks blocked (100% accuracy) ✓ All XSS attacks blocked (100% accuracy) ✓ Zero false positives ✓ Avg detection time: 3.2ms
Pricing
Developer Tier
Team Tier
Q2 2026 Release
API Development Platform launches May 2026. Early access for existing G8KEPR customers starts March 2026.
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