Interface Validator

You use the MCP Interface Validator to ensure your AI-generated frontend and backend code stay in sync with OpenAPI 3.0 specifications. It injects interface validation, checks real-time consistency, and provides auto-fix suggestions, letting you focus on building features rather than chasing interface mismatches.

How to use

You integrate the MCP Interface Validator with your preferred MCP client (Cursor, Windsurf, Trae, Augment, Claude Desktop, or other tools). Activate the interface validation by applying the dedicated constraint in your prompts, then describe your development requirements as you normally would. The tool automatically injects interface validation constraints, validates the generated frontend and backend against the OpenAPI specification in real time, and reports inconsistencies with actionable repair suggestions. You can rely on it to guide you toward code that adheres to the API contract without manual cross-checks.

How to install

Prerequisites you need before installing the MCP Interface Validator:

• Node.js version 18 or newer.

• An environment with MCP-capable AI tools (Cursor, Windsurf, Claude Desktop, etc.).

Install the MCP Interface Validator

npm install -g mcp-interface-validator

"Install from GitHub" option if you prefer direct source:

npm install -g https://github.com/xiaoxiaofeiya/mcp-interface-validator.git

Run and verify the server

After installation, you can verify the CLI is available and test basic interaction. Run the version check to confirm installation, then perform a simple stdio communication test to ensure the server responds as expected.

mcp-interface-validator --version

echo '{"jsonrpc": "2.0", "id": 1, "method": "initialize", "params": {"protocolVersion": "2024-11-05", "capabilities": {"tools": {}}, "clientInfo": {"name": "test", "version": "1.0.0"}}}' | mcp-interface-validator

Configuration and integration

Configure how the validator integrates with your development setup by enabling the MCP servers in your toolchain and providing environment specifics. You can place configuration in a project-wide file and reference the MCP server as shown in the integration snippets.

{
  "mcpServers": {
    "interface_validator": {
      "command": "mcp-interface-validator",
      "transport": "stdio",
      "env": {
        "NODE_ENV": "production"
      }
    }
  }
}

Notes on usage patterns

• Use multi-tool support to work across Cursor, Windsurf, Trae, Augment, and Claude Desktop without changing your workflow.
• Take advantage of real-time validation to resolve interface mismatches as you code.
• Review detailed error reports and suggested fixes to align frontend and backend interfaces with the OpenAPI spec.

Advanced configuration

You can customize validation rules and monitoring behavior with a project-level configuration file. This enables strict mode, custom rule sets, and real-time validation preferences.

{
  "server": {
    "name": "mcp-interface-validator",
    "version": "1.0.0",
    "description": "MCP Interface Validation Component"
  },
  "validation": {
    "strictMode": true,
    "allowAdditionalProperties": false,
    "validateExamples": true,
    "customRules": [
      "require-response-schemas",
      "validate-parameter-types",
      "check-security-definitions"
    ]
  },
  "integrations": {
    "cursor": { "enabled": true },
    "windsurf": { "enabled": true },
    "augment": { "enabled": true },
    "trae": { "enabled": true }
  },
  "monitoring": {
    "watchPatterns": ["**/*.ts", "**/*.js", "**/*.json", "**/*.yaml"],
    "ignorePatterns": ["node_modules/**", "build/**", "dist/**"],
    "debounceMs": 500
  }
}

Troubleshooting

If you encounter issues with command availability, permission errors, or missing configuration files, ensure you have the global installation or correct npx usage, run with appropriate privileges when required, and initialize a default configuration if needed.

# Check global installation
npm install -g mcp-interface-validator
# Or use npx to run without global install
npx mcp-interface-validator --version

# Initialize a default config if missing
mcp-interface-validator init

Available tools

Smart Constraint Injection

Automatically inject interface validation constraints into prompts to align generated code with API specs.

OpenAPI Specification Validation

Validate that generated code adheres to OpenAPI 3.0 specifications.

Real-time Interface Checking

Provide immediate feedback on frontend-backend interface consistency during code generation.

Multi-tool Integration

Works across Cursor, Windsurf, Trae, Augment, Claude Desktop, and other MCP-enabled tools.