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▸ TL;DR
Yes if the MCP server itself is local (stdio transport). Network-based MCPs (HTTP/SSE) need internet. Local MCPs like filesystem, sqlite, git work fully offline.
Open Unyly catalogMCP has two main transports: stdio (subprocess running locally) and HTTP/SSE (remote server). Stdio MCPs run on your machine and work offline by default. HTTP MCPs need a network connection to reach their endpoint. Common offline-capable MCPs: filesystem, sqlite, git, memory, time. The AI client (Claude Desktop, Cursor) itself usually needs internet to reach the LLM, so "offline MCP + online Claude" is the typical setup.
Function calling is a vendor-specific LLM API (OpenAI, Anthropic). MCP is an open protocol — same MCP server works with any client (Claude Desktop, Cursor, VS Code). MCP avoids vendor lock-in.
Yes, when you use MCPs from a vetted catalog. Unyly auto-scans every MCP for leaked secrets and malicious dependencies. Avoid installing random GitHub gists without verification.
Use the official SDK in your language (TypeScript, Python, Go), define tools with JSON Schema, expose them via stdio or HTTP. Submit to unyly.org/submit so other users can discover it.