JSON Schema MCP Server

An MCP server that manages JSON schemas and creates instances from them.

Features

• Store and retrieve JSON schemas
• Create new JSON schemas with a simple tool
• Generate instances from schemas with custom values

Resources

• schema://{schema_id} - Get a specific schema by ID
• schemas://list - Get a list of all available schemas

Tools

• create_schema - Create a new JSON schema
• create_instance - Create a JSON instance from a schema

Usage

1. Install dependencies:

   pip install mcp[cli]
   

2. Run the server:

   python server.py
   

3. Or install with Claude Desktop:

   mcp install server.py
   

Examples

Creating a Person Schema

// Create a schema for a person
create_schema(
  title="Person",
  properties={
    "name": {"type": "string"},
    "age": {"type": "integer"},
    "email": {"type": "string", "format": "email"}
  },
  required=["name", "email"]
)

Creating an Instance

// Create a person instance
create_instance(
  schema_id="<schema-id-from-previous-step>",
  values={
    "name": "John Doe",
    "age": 30,
    "email": "john@example.com"
  }
)