Babysitter API Testing

Comprehensive API testing for REST and GraphQL endpoints with contract validation

install

source · Clone the upstream repo

git clone https://github.com/a5c-ai/babysitter

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/a5c-ai/babysitter "$T" && mkdir -p ~/.claude/skills && cp -r "$T/library/specializations/qa-testing-automation/skills/api-testing" ~/.claude/skills/a5c-ai-babysitter-api-testing && rm -rf "$T"

manifest: library/specializations/qa-testing-automation/skills/api-testing/SKILL.md

API Testing Skill

Overview

This skill provides expert-level capabilities for API testing, covering REST, GraphQL, authentication flows, schema validation, and contract testing integration.

Capabilities

REST API Testing

Execute API tests with Supertest/REST Assured
HTTP method testing (GET, POST, PUT, PATCH, DELETE)
Header and cookie manipulation
File upload/download testing

GraphQL Testing

Query and mutation testing
Subscription testing
Schema introspection validation
Variable and fragment handling

Schema Validation

Validate OpenAPI/Swagger schemas
Response schema validation with Ajv/Joi
Generate test cases from API specifications
Contract validation

Authentication Testing

OAuth 2.0 flow testing
JWT token validation
API key authentication
Session-based authentication

Performance Assertions

Response time validation
Throughput measurements
Rate limiting verification

Contract Testing

Consumer contract generation
Provider verification
Pact integration

Target Processes

```
api-testing.js
```
- API test implementation
```
contract-testing.js
```
- Contract testing workflows
```
security-testing.js
```
- API security testing
```
performance-testing.js
```
- API performance validation

Dependencies

```
supertest
```
- HTTP assertions (Node.js)
```
axios
```
- HTTP client
```
ajv
```
- JSON schema validation
```
graphql-request
```
- GraphQL client

Usage Example

{
  kind: 'skill',
  skill: {
    name: 'api-testing',
    context: {
      action: 'execute-tests',
      baseUrl: 'https://api.example.com',
      specPath: 'openapi.yaml',
      authType: 'bearer',
      validateSchema: true
    }
  }
}

Configuration

The skill can auto-discover API specifications from OpenAPI/Swagger files and generate comprehensive test suites.