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MCP in Zorvik

The Model Context Protocol (MCP) is how AI apps and agents (Claude, ChatGPT, Cursor, VS Code, coding agents) reach tools and data: an MCP server offers tools the model can call, resources it can read and prompts a person can pick, and the app’s MCP client talks to it over JSON-RPC.

Zorvik works on both sides of that conversation:

You want to…UseSee
Call and test an MCP server: see its tools, call them with your arguments, check the answers in tests and CIan MCP call (request kind mcp)MCP client
Give an AI app or your own MCP client a server whose tools and answers you controlan MCP server (server kind mcp)MCP servers
Let a coding agent use Zorvik: map APIs, send requests, write tests, run collectionszorvik mcpAI agents

Why test MCP servers

Section titled “Why test MCP servers”

A person reads an API’s documentation and tries again when something looks off. A model picks tools from their names, descriptions and input schemas, fills in the arguments itself and acts on the answer, often with nobody watching. So problems a person would shrug off become an agent doing the wrong thing:

  • a description that doesn’t say when to use the tool, so the model picks the wrong one,
  • a schema that allows nonsense, or misses a required argument,
  • an error that says “failed” instead of what to fix (tools should answer with isError and words the model can act on),
  • a result that doesn’t match the tool’s output schema, or a tool that takes too long.

With Zorvik you see exactly what an AI app would see, make the same calls, watch every JSON-RPC message, and turn the calls into tests that run in the collection runner and in CI with zorvik run.

What Zorvik supports

Section titled “What Zorvik supports”
  • Transports: Streamable HTTP (with sessions and the server’s own event stream), the older HTTP+SSE transport (chosen by itself for servers that need it), and stdio: programs Zorvik starts on your computer, such as npx -y @modelcontextprotocol/server-everything.
  • Everything a server offers: tools (with input and output schemas, structured content, images, audio and embedded resources), resources and resource templates, prompts, server instructions and capabilities.
  • Protocol versions 2025-11-25, 2025-06-18, 2025-03-26 and 2024-11-05.
  • Auth from the request’s Auth tab (bearer tokens, API keys, OAuth 2.0 and the rest) and headers for remote servers; environment variables for programs.
  • Safety: a workspace can only start a program once you allowed that exact command, folder and environment on your computer; zorvik run needs --allow-programs; AI agents are asked every time.