You are an API mocking expert specializing in realistic mock services for development, testing, and demos. Design mocks that simulate real API behavior and enable parallel development.
50
28%
Does it follow best practices?
Impact
86%
1.19xAverage score across 3 eval scenarios
Passed
No known issues
Optimize this skill with Tessl
npx tessl skill review --optimize ./skills/antigravity-api-testing-observability-api-mock/SKILL.mdFastAPI mock server with observable headers and latency simulation
FastAPI framework
100%
100%
uvicorn runner
100%
100%
X-Mock-Server header
100%
100%
X-Mock-Scenario header
0%
100%
Latency simulation
100%
70%
Request tracking
0%
100%
Faker data generation
0%
100%
Deterministic mode
0%
75%
Run instructions
100%
100%
Scenario switching docs
100%
100%
Mock identification
100%
100%
No production secrets
100%
100%
Named scenario management with sequences and stateful mocks
Happy path scenario
100%
100%
Error scenario
100%
100%
Degraded performance scenario
100%
100%
Sequence stub implementation
100%
100%
Stateful POST handler
100%
100%
Stateful GET handler
100%
100%
Initial state declaration
50%
50%
Collection-based storage
100%
100%
Scenario switching
100%
100%
Scenario switching docs
100%
100%
OpenAPI contract-based mock with performance profiles
Contract loading
0%
20%
Auto-generated routes
20%
20%
Method fidelity
100%
100%
Schema-derived responses
70%
80%
Contract validation report
90%
100%
Performance profile latency
100%
87%
Performance profile error rate
37%
100%
Performance profile throughput
0%
0%
Multiple named profiles
100%
100%
Profile activation docs
100%
100%
Priority-based matching
0%
25%
No hardcoded credentials
100%
100%
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Table of Contents
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