api-testing-observability-api-mock

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.

1.19x

Quality

37%

Does it follow best practices?

Impact

86%

1.19x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Optimize this skill with Tessl

npx tessl skill review --optimize ./skills/antigravity-api-testing-observability-api-mock/SKILL.md

Evaluation results

95%

29%

Payment API Mock Server

FastAPI mock server with observable headers and latency simulation

Criteria

Without context

With context

FastAPI framework

100%

uvicorn runner

100%

X-Mock-Server header

100%

X-Mock-Scenario header

100%

Latency simulation

100%

70%

Request tracking

100%

Faker data generation

100%

Deterministic mode

75%

Run instructions

100%

Scenario switching docs

100%

Mock identification

100%

No production secrets

100%

Without context: $0.7586 · 2m 54s · 26 turns · 27 in / 10,979 out tokens

With context: $1.7485 · 5m 18s · 49 turns · 96 in / 20,426 out tokens

96%

Shopping Cart Mock Backend for QA Test Suite

Named scenario management with sequences and stateful mocks

Criteria

Without context

With context

Happy path scenario

100%

Error scenario

100%

Degraded performance scenario

100%

Sequence stub implementation

100%

Stateful POST handler

100%

Stateful GET handler

100%

Initial state declaration

50%

Collection-based storage

100%

Scenario switching

100%

Scenario switching docs

100%

Without context: $0.4116 · 1m 40s · 13 turns · 14 in / 7,164 out tokens

With context: $1.0769 · 3m 20s · 35 turns · 349 in / 12,955 out tokens

67%

11%

Logistics API Mock from OpenAPI Specification

OpenAPI contract-based mock with performance profiles

Criteria

Without context

With context

Contract loading

20%

Auto-generated routes

20%

Method fidelity

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

Multiple named profiles

100%

Profile activation docs

100%

Priority-based matching

25%

No hardcoded credentials

100%

Without context: $0.9630 · 3m 27s · 26 turns · 74 in / 16,743 out tokens

With context: $1.4410 · 4m 9s · 40 turns · 88 in / 18,425 out tokens

Repository: boisenoise/skills-collections
Commit: 5c5ae21

Evaluated: 19 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Payment API Mock Server Shopping Cart Mock Backend for QA Test Suite Logistics API Mock from OpenAPI Specification

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