Fetch URL

GKMCP is a Rust-based MCP server implementation that provides a fetch tool for retrieving content from URLs. Built with the Tokio async runtime and Reqwest HTTP client, it follows the 2025-03-26 protocol version specification and implements the core MCP request handling flow including initialization, tool listing, and tool execution. The server processes JSON-RPC style requests from stdin, handles tool calls asynchronously, and returns formatted responses with proper error handling. This implementation is particularly useful for AI assistants that need to access web content during conversations, enabling capabilities like retrieving documentation, checking online resources, or gathering information from specific websites.