mcp-builder

Build an MCP server by defining tools with input validation, error handling, and retries to call external APIs. Use FastMCP for Python or MCP SDK for Node/TypeScript, structure tool definitions with clear schemas, and follow best practices for lifecycle management and resource handling.

Structure MCP server tools by defining explicit input schemas, implementing comprehensive error handling, and organizing resources by transport type. Apply validation at the entry point, handle edge cases gracefully, and document resource lifecycle to reduce integration complexity.

Yes, MCP servers work with both Python via FastMCP and Node/TypeScript via MCP SDK. Both implementations follow the same design principles for tool registration, transport configuration, and lifecycle management, enabling language-agnostic LLM integrations.

Enforce input validation on all tool parameters, implement retry logic with exponential backoff for external calls, sanitize error messages to prevent information leakage, and test edge cases thoroughly. Apply these practices consistently across Python and TypeScript codebases.

Configure transports by selecting the appropriate protocol for your deployment context, define tool lifecycle hooks for initialization and cleanup, manage resources efficiently, and test graceful shutdown. Document transport selection rationale to guide future maintenance.