MCPShark Viewer (VS Code/Cursor extension)- view MCP traffic in-editor

In plain words

MCPShark Viewer is a VS Code and Cursor extension that displays Model Context Protocol traffic directly within the editor. It's designed for developers building MCP agents and tools who need to inspect and debug protocol communications without switching between terminals and logs. The extension eliminates the need to piece together fragmented debugging information by consolidating MCP traffic visibility in one place.

written from the facts on this page · September 2026

From the sources

In the maker’s words, at launch

A few days ago I posted MCPShark (a traffic inspector for the Model Context Protocol). I just shipped a VS Code / Cursor extension that lets you view MCP traffic directly in the editor, so you’re not jumping between terminals, logs, and "I think this is what got sent". VS Code Marketplace…

• MT
  MCPShark – Traffic Inspector for Model Context ProtocolDec 2025 · ▲37

  https://github.com/mcp-shark/mcp-shark Site: https://mcpshark.sh/ I built MCPShark, a traffic inspector for the Model Context Protocol (MCP). It sits between your editor/LLM client and MCP servers so you can: • See all MCP traffic (requests, responses, tools, resources) in one place • Debug sessions when tools don’t behave as expected • Optionally run “Smart Scan” checks to flag risky tools / configs

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  MCP Traffic Analysis ToolNov 2025 · github.com · ▲38

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• MF
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