Summary
Gives Claude five schema operations: generating JSON Schema from sample data with automatic type inference and enum detection, converting JSON or schemas into TypeScript interfaces, validating data against schemas with detailed error paths, creating realistic mock data with smart field detection (emails, names, phone numbers), and diffing two schemas to identify breaking changes. Reach for this when you're working with APIs or data structures and need Claude to validate payloads, generate types for your codebase, produce test fixtures, or analyze schema evolution between versions. Runs locally via stdio, so your schemas and data stay on your machine.
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mcp-schema-tools
MCP server providing schema validation and generation tools for AI agents.
Tools
generate_json_schema
Generate a JSON Schema from sample JSON data. Infers types, required fields, formats (email, date, URI, UUID), and detects enum patterns from multiple examples.
generate_typescript
Generate TypeScript interfaces and types from JSON data or a JSON Schema. Handles nested objects, arrays, optional fields, enums, and union types.
validate_schema
Validate data against a JSON Schema with detailed error messages including JSON path, expected type, actual value, and the violated constraint keyword.
mock_from_schema
Generate realistic mock data from a JSON Schema. Smart field-name detection produces contextual values: email fields get valid emails, name fields get realistic names, phone fields get formatted numbers, etc.
diff_schemas
Compare two JSON Schemas to find added, removed, and changed fields. Identifies type changes, constraint changes, and classifies each difference as breaking or non-breaking for backwards compatibility analysis.
Setup
npm install
npm run build
Usage with Claude Desktop
Add to your claude_desktop_config.json:
{
"mcpServers": {
"schema-tools": {
"command": "node",
"args": ["path/to/mcp-schema-tools/dist/index.js"]
}
}
}
License
MIT
Featured
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →Categories
Registryactive
Package@rog0x/mcp-schema-tools
TransportSTDIO
UpdatedMar 22, 2026
