validasi_mcp 0.1.0-beta.2

MCP stdio adapter for Validasi schemas and validation tools.

validasi_mcp

MCP stdio adapter for Validasi schemas.

Beta: this adapter currently supports Validasi v1.0.0-dev.x only.

Features

• Register named schemas through a SchemaRegistry
• Expose MCP tools:
  • list_schemas
  • describe_schema
  • validate_input
• Return deterministic structured validation payloads from Validasi

Quick start

import 'package:validasi/validasi.dart';
import 'package:validasi/rules.dart';
import 'package:validasi_mcp/validasi_mcp.dart';

final registry = SchemaRegistry()
  ..register(
    id: 'username',
    description: 'username must be at least 3 chars',
    builder: () => Validasi.string([
      StringRules.minLength(3),
    ]),
  );

final handlers = ValidasiMcpToolHandlers(registry: registry);
final server = ValidasiMcpStdioServer(handlers: handlers);
await server.serve();

Run server

dart run bin/validasi_mcp.dart

The process uses JSON-RPC over stdio via the first-class dart_mcp library and supports MCP initialize, tools/list, and tools/call.