Schema

Lets an assistant generate, validate, mock, and diff JSON Schemas and TypeScript types from sample JSON data.

What you can do

Provides five tools for schema work: generate_json_schema infers a JSON Schema from sample JSON, detecting types, required fields, formats such as email, date, URI and UUID, and enum patterns across multiple examples. generate_typescript produces TypeScript interfaces and types from JSON data or a schema, handling nested objects, arrays, optional fields, enums and unions. validate_schema checks data against a schema and reports JSON path, expected type, actual value and the violated constraint. mock_from_schema creates realistic sample data using field-name detection, and diff_schemas compares two schemas, flagging added, removed and changed fields and classifying differences as breaking…

When to use it

Useful when an assistant needs to derive a schema or TypeScript types from example payloads, check that data conforms to a schema, produce test fixtures, or review whether a schema change breaks backwards compatibility.

Requirements

Runs locally as a stdio process, installed from the npm package @rog0x/mcp-schema-tools; the README setup builds it with npm install and npm run build, and Claude Desktop is configured to launch the built dist/index.js with node. No authentication, environment variables or headers are declared.