Babysitter api-mock-server

Generate and run mock API servers from OpenAPI specifications

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 "$T/library/specializations/software-architecture/skills/api-mock-server" ~/.claude/skills/a5c-ai-babysitter-api-mock-server && rm -rf "$T"
manifest: library/specializations/software-architecture/skills/api-mock-server/SKILL.md
source content

API Mock Server Skill

Overview

Generates and runs mock API servers from OpenAPI specifications with dynamic response generation, request validation, and Prism/Mockoon integration.

Capabilities

  • Generate mock server from OpenAPI spec
  • Dynamic response generation based on schemas
  • Request validation against spec
  • Prism and Mockoon integration
  • Custom response scenarios
  • Callback and webhook simulation
  • Stateful mock behavior

Target Processes

  • api-design-specification
  • microservices-decomposition

Input Schema

{
  "type": "object",
  "required": ["specPath"],
  "properties": {
    "specPath": {
      "type": "string",
      "description": "Path to OpenAPI specification"
    },
    "port": {
      "type": "number",
      "default": 4010
    },
    "engine": {
      "type": "string",
      "enum": ["prism", "mockoon", "custom"],
      "default": "prism"
    },
    "options": {
      "type": "object",
      "properties": {
        "dynamic": {
          "type": "boolean",
          "default": true,
          "description": "Generate dynamic responses"
        },
        "validateRequest": {
          "type": "boolean",
          "default": true
        },
        "cors": {
          "type": "boolean",
          "default": true
        },
        "scenarios": {
          "type": "array",
          "description": "Custom response scenarios"
        }
      }
    }
  }
}

Output Schema

{
  "type": "object",
  "properties": {
    "serverUrl": {
      "type": "string"
    },
    "port": {
      "type": "number"
    },
    "endpoints": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "method": { "type": "string" },
          "path": { "type": "string" }
        }
      }
    },
    "pid": {
      "type": "number",
      "description": "Process ID of running server"
    }
  }
}

Usage Example

{
  kind: 'skill',
  skill: {
    name: 'api-mock-server',
    context: {
      specPath: 'api/openapi.yaml',
      port: 4010,
      engine: 'prism',
      options: {
        dynamic: true,
        validateRequest: true
      }
    }
  }
}