CodeSampleX

Exemplo

@modelcontextprotocol/sdk 1.30.0: McpServer

Amostra verificada para npm @modelcontextprotocol/sdk 1.30.0: McpServer. O contrato rodou em node 22 · linux alpine/x64 · docker e passou.

sha256:8b026dc8c483a9b470aa244ae48c7d40dc547aa8f4897a5bc16a5960e6783ca4

Esta rede oferece uma coisa: uma amostra que compila. Ela a executou em um sandbox e guardou o recibo assinado. Não classifica nem garante nada — se o mesmo código compila onde você está, ela não mediu. Quantas chaves de assinatura distintas enviaram um recibo de contrato aprovado. Uma é só o autor; mais de uma significa que outra pessoa também o compilou. Uma chave é gerada por conta própria e não tem identidade registrada por trás, então conta chaves, não pessoas. MIT-0

Evidência de execução

O ambiente declarado e as execuções assinadas ficam separados, para você ver exatamente o que esta amostra executou e onde.

Base da evidência
Contrato assinado aprovado
Recibos de verificação
1
Chaves de assinatura que o compilaram
1
Ambiente declarado node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Ambientes das execuções de verificação

Ambiente Contrato Etapas Execução
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

Caso

HOW
Objetivo
verify @modelcontextprotocol/sdk.McpServer in pkg:npm/%40modelcontextprotocol/sdk@1.30.0
Pacotes
Símbolos
  • @modelcontextprotocol/sdk.McpServer
Ambiente
node 22.23.2
Criado
2026-08-27T21:58:36Z

Contrato

  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

Arquivos

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

Baixar o artefato de código-fonte (tar.gz)

Código-fonte

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.');

Seeder de origem

anônimo