CodeSampleX

示例

@modelcontextprotocol/sdk 1.30.0: McpServer

已验证示例 — npm @modelcontextprotocol/sdk 1.30.0: McpServer. contract 在 node 22 · linux alpine/x64 · docker 上运行并通过： McpServer initializes with server metadata…

sha256:8b026dc8c483a9b470aa244ae48c7d40dc547aa8f4897a5bc16a5960e6783ca4

本网络只提供一件事：能构建的样本。它在沙箱中运行并保留签名回执。它不评级、不担保——同样的代码能否在你的环境构建，它没有测量过。 提交了通过的契约回执的不同签名密钥数量。为 1 表示只有作者；大于 1 表示还有其他人构建过。密钥是自行生成的，背后没有注册身份，因此计的是密钥而非人。 MIT-0

执行证据

声明的环境与签名的运行分开呈现，你可以看到这个样本究竟运行了什么、在哪里运行。

证据依据
签名契约通过
验证回执
1
构建过它的签名密钥
1
声明的环境 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

验证运行环境

环境 契约 阶段 运行日期
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-27

案例

HOW
目标
verify @modelcontextprotocol/sdk.McpServer in pkg:npm/%40modelcontextprotocol/sdk@1.30.0
包
符号
  • @modelcontextprotocol/sdk.McpServer
环境
node 22.23.2
创建时间
2026-08-27T21:58:36Z

契约

  1. McpServer initializes with server metadata and exposes the underlying low-level Server instance
  2. McpServer.tool registers tools with Zod schema validation and executes handlers over transport
  3. McpServer.tool returns structured error results with isError true when argument validation fails
  4. McpServer.resource registers static and dynamic templated resources and serves resource contents
  5. McpServer.prompt registers prompt templates with arguments and renders structured prompt messages
  6. McpServer pairs with Client over InMemoryTransport and closes cleanly

文件

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.js
  • test/contract.mjs

下载源代码构件 (tar.gz)

源代码

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify @modelcontextprotocol/sdk.McpServer in pkg:npm/%40modelcontextprotocol/sdk@1.30.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40modelcontextprotocol/sdk@1.30.0
Demonstrate these symbols/APIs:
  - @modelcontextprotocol/sdk.McpServer

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
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package-lock.json
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package.json
{
  "name": "sample-mcp-server",
  "version": "1.0.0",
  "private": true,
  "license": "MIT-0",
  "type": "module",
  "dependencies": {
    "@modelcontextprotocol/sdk": "1.30.0",
    "zod": "^3.24.2"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify @modelcontextprotocol/sdk.McpServer in pkg:npm/%40modelcontextprotocol/sdk@1.30.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40modelcontextprotocol/sdk@1.30.0"
  ],
  "symbols": [
    "@modelcontextprotocol/sdk.McpServer"
  ]
}
src/index.js
import { McpServer, ResourceTemplate } from '@modelcontextprotocol/sdk/server/mcp.js';
import { z } from 'zod';

/**
 * Creates and initializes an McpServer instance with specified server info and options.
 *
 * @param {{ name: string, version: string }} serverInfo - Server metadata
 * @param {object} [options] - Optional server configuration options
 * @returns {McpServer} Initialized McpServer instance
 */
export function createMcpServer(serverInfo, options) {
  return new McpServer(serverInfo, options);
}

/**
 * Registers arithmetic tools on an McpServer instance.
 *
 * @param {McpServer} server - Target McpServer instance
 */
export function registerCalculatorTools(server) {
  server.tool(
    'add',
    'Add two numbers',
    {
      a: z.number().describe('first addend'),
      b: z.number().describe('second addend')
    },
    async ({ a, b }) => {
      return {
        content: [
          {
            type: 'text',
            text: String(a + b)
          }
        ]
      };
    }
  );

  server.tool(
    'multiply',
    'Multiply two numbers',
    {
      x: z.number(),
      y: z.number()
    },
    async ({ x, y }) => {
      return {
        content: [
          {
            type: 'text',
            text: String(x * y)
          }
        ]
      };
    }
  );
}

/**
 * Registers static and dynamic resources on an McpServer instance.
 *
 * @param {McpServer} server - Target McpServer instance
 */
export function registerConfigResources(server) {
  // Static configuration resource
  server.resource(
    'app-config',
    'config://app/settings',
    async (uri) => {
      return {
        contents: [
          {
            uri: uri.href,
            mimeType: 'application/json',
            text: JSON.stringify({ environment: 'test', debug: false })
          }
        ]
      };
    }
  );

  // Dynamic templated resource
  server.resource(
    'user-profile',
    new ResourceTemplate('users://{userId}/profile', { list: undefined }),
    async (uri, { userId }) => {
      return {
        contents: [
          {
            uri: uri.href,
            mimeType: 'application/json',
            text: JSON.stringify({ userId, status: 'active' })
          }
        ]
      };
    }
  );
}

/**
 * Registers prompt templates on an McpServer instance.
 *
 * @param {McpServer} server - Target McpServer instance
 */
export function registerGreetingPrompt(server) {
  server.prompt(
    'greeting',
    'Generate a personalized greeting message',
    {
      name: z.string().describe('Recipient name'),
      tone: z.enum(['formal', 'casual']).optional()
    },
    ({ name, tone = 'formal' }) => {
      const greeting = tone === 'casual' ? `Hey ${name}!` : `Hello, ${name}. Welcome.`;
      return {
        messages: [
          {
            role: 'user',
            content: {
              type: 'text',
              text: greeting
            }
          }
        ]
      };
    }
  );
}

export { McpServer, ResourceTemplate };
test/contract.mjs
import assert from 'node:assert/strict';
import {
  McpServer,
  ResourceTemplate,
  createMcpServer,
  registerCalculatorTools,
  registerConfigResources,
  registerGreetingPrompt
} from '../src/index.js';
import { Client } from '@modelcontextprotocol/sdk/client/index.js';
import { InMemoryTransport } from '@modelcontextprotocol/sdk/inMemory.js';
import { Server } from '@modelcontextprotocol/sdk/server/index.js';

// 1. Verify module exports and constructor types
assert.equal(typeof McpServer, 'function', 'McpServer must be a class/function constructor');
assert.equal(typeof ResourceTemplate, 'function', 'ResourceTemplate must be a class/function constructor');
assert.equal(typeof createMcpServer, 'function', 'createMcpServer must be a helper function');
assert.equal(typeof registerCalculatorTools, 'function', 'registerCalculatorTools must be a function');
assert.equal(typeof registerConfigResources, 'function', 'registerConfigResources must be a function');
assert.equal(typeof registerGreetingPrompt, 'function', 'registerGreetingPrompt must be a function');

// 2. McpServer initialization and low-level server exposure
const server = createMcpServer({
  name: 'test-mcp-server',
  version: '1.2.3'
});

assert.ok(server instanceof McpServer, 'Instance must inherit from McpServer');
assert.ok(server.server instanceof Server, 'server.server must expose the underlying low-level Server instance');

// 3. Register tools, resources, and prompts
registerCalculatorTools(server);
registerConfigResources(server);
registerGreetingPrompt(server);

// 4. Pair server and client over InMemoryTransport
const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair();
const client = new Client(
  {
    name: 'test-client',
    version: '1.0.0'
  },
  {
    capabilities: {}
  }
);

await server.connect(serverTransport);
await client.connect(clientTransport);

// 5. Verify Tool listing and invocation
const toolList = await client.listTools();
assert.ok(Array.isArray(toolList.tools), 'listTools must return an array of tools');
const toolNames = toolList.tools.map((t) => t.name);
assert.ok(toolNames.includes('add'), 'toolList must contain add tool');
assert.ok(toolNames.includes('multiply'), 'toolList must contain multiply tool');

const addToolMeta = toolList.tools.find((t) => t.name === 'add');
assert.equal(addToolMeta.description, 'Add two numbers', 'add tool description must match');
assert.equal(addToolMeta.inputSchema.type, 'object', 'inputSchema must be object');
assert.ok(addToolMeta.inputSchema.properties.a, 'inputSchema must define property a');
assert.ok(addToolMeta.inputSchema.properties.b, 'inputSchema must define property b');

// Call add tool with valid parameters
const addResult = await client.callTool({
  name: 'add',
  arguments: { a: 15, b: 27 }
});
assert.equal(addResult.isError, undefined, 'Successful tool call must not set isError to true');
assert.ok(Array.isArray(addResult.content), 'Result must contain content array');
assert.equal(addResult.content[0].type, 'text', 'Content item type must be text');
assert.equal(addResult.content[0].text, '42', 'Result text must equal string sum');

// Call multiply tool with valid parameters
const mulResult = await client.callTool({
  name: 'multiply',
  arguments: { x: 6, y: 7 }
});
assert.equal(mulResult.content[0].text, '42', 'Multiply tool result text must match');

// 6. Verify Tool schema validation error handling
const invalidCallResult = await client.callTool({
  name: 'add',
  arguments: { a: 'not-a-number', b: 10 }
});
assert.equal(invalidCallResult.isError, true, 'Validation failure must return isError: true');
assert.ok(
  invalidCallResult.content[0].text.includes('Input validation error'),
  'Validation failure message must describe input validation error'
);

// 7. Verify Resource listing and reading (static and dynamic template)
const resourceList = await client.listResources();
assert.ok(Array.isArray(resourceList.resources), 'listResources must return an array');
const resourceUris = resourceList.resources.map((r) => r.uri);
assert.ok(resourceUris.includes('config://app/settings'), 'Resource list must include static config URI');

// Read static resource
const staticResource = await client.readResource({ uri: 'config://app/settings' });
assert.ok(Array.isArray(staticResource.contents), 'Resource read must return contents array');
assert.equal(staticResource.contents[0].uri, 'config://app/settings', 'Content URI must match requested URI');
assert.equal(staticResource.contents[0].mimeType, 'application/json', 'MIME type must match');
const staticParsed = JSON.parse(staticResource.contents[0].text);
assert.deepEqual(staticParsed, { environment: 'test', debug: false }, 'Static resource JSON must match');

// Read templated resource
const templatedResource = await client.readResource({ uri: 'users://user-42/profile' });
assert.equal(templatedResource.contents[0].uri, 'users://user-42/profile', 'Templated content URI must match');
const templatedParsed = JSON.parse(templatedResource.contents[0].text);
assert.deepEqual(templatedParsed, { userId: 'user-42', status: 'active' }, 'Templated resource parameters must match');

// 8. Verify Prompt listing and retrieval
const promptList = await client.listPrompts();
assert.ok(Array.isArray(promptList.prompts), 'listPrompts must return an array');
const greetingPromptMeta = promptList.prompts.find((p) => p.name === 'greeting');
assert.ok(greetingPromptMeta, 'greeting prompt must be registered');
assert.equal(greetingPromptMeta.description, 'Generate a personalized greeting message', 'Prompt description must match');

// Get prompt with casual tone
const promptResult = await client.getPrompt({
  name: 'greeting',
  arguments: { name: 'Alice', tone: 'casual' }
});
assert.ok(Array.isArray(promptResult.messages), 'getPrompt must return messages array');
assert.equal(promptResult.messages[0].role, 'user', 'Prompt message role must be user');
assert.equal(promptResult.messages[0].content.text, 'Hey Alice!', 'Prompt message text must match rendered template');

// 9. Cleanly close client and server transports
await client.close();
await server.close();

console.log('Contract tests passed successfully.');

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