Runtime schema validation middleware for MCP tool inputs and outputs. Compatible with Zod, Valibot, ArkType.
Another JSON Schema Validator
Another JSON Schema Validator
Object schema validation
Additional JSON-Schema keywords for Ajv JSON validator
Decorator-based property validation for classes.
Custom error messages in JSON Schemas for Ajv validator
validate form asynchronous
Validate form asynchronous
A JSON schema validator that will run on Cloudflare workers. Supports drafts 4, 7, 2019-09, and 2020-12.
A validator for OpenAPI documents.
Fast, lightweight JSON Schema validator for Node.js and browsers — full support for draft-04, draft-06, draft-07, draft-2019-09, and draft-2020-12 (latest)
A JavaScript implementation of a extendable, fully compliant JSON Schema validator.
Ajv class for JSON Schema draft-04
Command line interface for Ajv JSON schema validator
ESLint plugin that validates data using JSON Schema Validator.
Validator middleware using Zod
A fast and easy to use JSON Schema validator
Migrate JSON-Schema to draft-06
Validate OpenApi specifications against their JSON schema
Simple validation library
Validator middleware using Standard Schema
Validate identifier/keywords name
Format validation for Ajv v7+
Rails Active MCP enables secure Rails console access through Model Context Protocol (MCP) for AI agents and development tools like Claude Desktop. Provides safe database querying, model introspection, and code execution with comprehensive safety checks and audit logging. Features include: • Safe Ruby code execution with configurable safety checks • Read-only database query tools with result limiting • Rails model introspection (schema, associations, validations) • Dry-run code analysis for safety validation • Environment-specific configuration presets • Comprehensive audit logging and monitoring • Claude Desktop integration out of the box
rails-ai-context turns your running Rails app into the source of truth for AI coding assistants. Instead of guessing from training data or stale file reads, agents query 38 live tools (via MCP server or CLI) to get your actual schema, associations, routes, inherited filters, conventions, and test patterns. Semantic validation catches cross-file errors (wrong columns, missing partials, broken routes) before code runs — so AI writes correct code on the first try. Auto-generates context files for Claude Code, Cursor, GitHub Copilot, OpenCode, and Codex CLI. Works standalone or in-Gemfile.