First running version

reference_impl/mcplets/info-pool/api-access/index.ts

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+/**
+ * 外部 API アクセス MCPlet
+ * pool: info-pool | mcpletType: read | visibility: [model]
+ */
+import { MCPletServer } from '../../mcplet-server.js';
+
+const MOCK_SERVICE_URL = process.env.MOCK_SERVICE_URL ?? 'http://localhost:5100';
+
+const server = new MCPletServer('api-access-mcplet');
+
+server.registerTool({
+  name: 'call_external_api',
+  description: '外部APIを呼び出してデータを取得します。在庫情報や外部データソースの参照に使用します。',
+  inputSchema: {
+    type: 'object',
+    properties: {
+      api: {
+        type: 'string',
+        description: '呼び出すAPI識別子 (例: inventory, customer_stats)',
+      },
+      params: {
+        type: 'object',
+        description: 'APIクエリパラメータ',
+        additionalProperties: true,
+      },
+    },
+    required: ['api'],
+  },
+  mcpletType: 'read',
+  pool: 'info-pool',
+  visibility: ['model'],
+  handler: async (args) => {
+    const api = args['api'] as string;
+    const params = (args['params'] as Record<string, string> | undefined) ?? {};
+
+    if (api === 'inventory') {
+      const item = params['item'] ?? '';
+      const qs = item ? `?item=${encodeURIComponent(item)}` : '';
+      const res = await fetch(`${MOCK_SERVICE_URL}/erp/inventory${qs}`);
+      if (!res.ok) throw new Error(`Inventory API returned ${res.status}`);
+      return res.json();
+    }
+
+    return { api, params, data: `Mock API response for api="${api}"` };
+  },
+});
+
+await server.listen();