Gentoro

Automatically generates Model Context Protocol (MCP) server implementations from OpenAPI 3.0+ specifications. The generator parses OpenAPI schemas, extracts endpoint definitions, parameter types, and response structures, then synthesizes Node.js/TypeScript server code that implements the MCP protocol with proper tool definitions, input validation, and error handling. This eliminates manual boilerplate for exposing REST APIs as MCP tools.

Extracts parameter definitions, request/response types, and constraints from OpenAPI endpoint schemas and automatically generates MCP tool schemas with proper input validation, type constraints, and required field enforcement. The generator maps OpenAPI parameter types (query, path, body) to MCP input schema format and registers tools with the MCP server runtime, enabling LLM agents to discover and invoke API endpoints with type safety.

Generates a complete, runnable Node.js/TypeScript MCP server implementation that includes HTTP client initialization, endpoint routing, request/response transformation, and MCP protocol message handling. The generated server implements the MCP specification, handles tool invocation messages from clients, translates them to REST API calls, and returns results in MCP format. The code is production-ready with error handling, logging hooks, and configurable base URL/authentication.

Maps individual REST API endpoints from an OpenAPI specification to discrete MCP tools, preserving endpoint semantics (HTTP method, path, parameters) and translating them into tool invocation handlers. Each endpoint becomes a callable MCP tool with a name derived from the operationId or endpoint path, input parameters mapped from OpenAPI definitions, and output formatted as structured data. The mapping preserves endpoint documentation and constraints.

Automatically generates TypeScript type definitions and transformation logic that converts between OpenAPI request/response schemas and MCP message formats. The generator creates typed request builders and response parsers that validate data at compile-time and runtime, ensuring that tool invocations match API expectations and responses are properly formatted for MCP clients. This includes handling of different content types, status codes, and error responses.

Parses OpenAPI 3.0+ specifications in JSON or YAML format, validates them against the OpenAPI schema, extracts metadata (title, version, description, servers), and normalizes the specification for code generation. The parser handles both inline and referenced schemas, resolves $ref pointers, and validates that all required fields are present and properly formatted. This ensures that only valid specifications are used for code generation.

Provides customizable code generation templates that allow developers to control the structure, style, and content of generated MCP server code. The generator uses template engines to render server code, tool definitions, and configuration files, allowing customization of naming conventions, error handling patterns, logging, and authentication approaches. Templates can be overridden to match project standards and coding styles.

Automatically generates error handling logic that maps HTTP status codes and error responses from the REST API to MCP error messages and tool execution failures. The generator creates handlers for common error scenarios (4xx client errors, 5xx server errors, timeouts, network failures) and translates API error responses into structured MCP error format with appropriate error codes and messages. This ensures that agent clients receive meaningful error information.