mcp-server-development

Build an MCP server using Node.js/TypeScript with the MCP SDK, implementing Tools, Resources, or Prompts over JSON-RPC 2.0 transport. Initialize your scaffold, install dependencies, add at least one capability, and test via stdio transport for local validation.

MCP servers expose three capability types: Tools execute functions with strict input validation and idempotent design; Resources provide Claude access to structured data; Prompts supply reusable instruction templates. Each integrates through JSON-RPC 2.0 endpoints.

Implement strict input validation at tool entry points and return meaningful error messages that identify the failure source. Follow idempotent design patterns so repeated calls produce consistent results without side effects or duplicate processing.

Yes. MCP servers enforce least-privilege access control through scoped Tool and Resource definitions, explicit permission boundaries, and documented capability exposure. Permissions default to minimal and expand only as needed.

Document each Tool, Resource, and Prompt with clear descriptions of inputs, outputs, and error cases. Use blameless documentation that explains intent and constraints, helping Claude and users understand capabilities and limitations.

No. This Skill provides structured guidance on JSON-RPC 2.0 transport and MCP host architecture. Follow the scaffolding and examples to deploy servers without deep protocol expertise, though familiarity with TypeScript and Node.js is assumed.