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MCP Jest

@josharsh

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基本情報

カテゴリ

その他

ライセンス

MIT license

トランスポート

stdio

作者

josharsh

MCP Jest について

Automated testing for Model Context Protocol servers. Ship MCP Servers with confidence.

MCP Jest の設定

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このサーバーの README には解析可能な MCP 設定ブロックが含まれていません。インストール手順はリポジトリをご確認ください。

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MCP Jest のツール

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ツールは README から自動的に抽出されます。メンテナーは ## Tools という見出しの下に記載することで、このタブに反映できます。

概要

What is mcp-jest?

mcp-jest is a testing framework for Model Context Protocol (MCP) servers – like Jest, but for MCP. It provides automated testing, instant feedback, and CI/CD integration for MCP servers built in any language.

How to use mcp-jest?

Install via npm install mcp-jest (or globally with npm install -g mcp-jest), then either call the mcpTest function from your code or use the mcp-jest CLI command with a server command and list of tools to test. For example: mcp-jest node ./server.js --tools search,email.

Key features of mcp-jest

  • Dead simple API – one function call tests your entire server.
  • Declarative testing – describe what to test, not how.
  • Comprehensive coverage – connection, capability discovery, functional, and validation.
  • CI/CD ready – works with GitHub Actions, Jenkins, and more.
  • Fast execution – complete suites in under 500ms.
  • Zero dependencies beyond the official MCP SDK.
  • Flexible usage – library, CLI, config files, TypeScript support.

Use cases of mcp-jest

  • Development: test changes instantly during development.
  • CI/CD: automated testing in build pipelines.
  • Deployment: verify servers work before going live.
  • Monitoring: regular health checks in production.
  • Documentation: ensure examples actually work.

よくある質問

1

What runtime does mcp-jest require?

Node.js 18+ (for ESM and modern features) and any MCP server implementing the Model Context Protocol. TypeScript 5+ is optional for full type safety.

2

Does mcp-jest work with MCP servers in any language?

Yes, as long as the server follows the MCP standard. The README shows examples with Node.js and Python servers.

3

Can I use mcp-jest in my existing test suite?

Yes, you can import `mcp-jest` as a library and integrate it with test runners like Jest, Vitest, or Mocha.

4

How do I test a specific tool's arguments and results?

Pass tool definitions with `args` and an `expect` function to `mcpTest`. The function receives the tool result and should return a boolean or throw.

5

What is the connection timeout and how can I adjust it?

The default timeout is not specified, but you can increase it using the `--timeout` CLI flag (e.g., `--timeout 60000` for 60 seconds).

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