Hourei MCP Server

Instructions

Implementation Reference

• index.js:164-188 (handler)

  The handler function that implements the get_law_data tool. It takes lawNum, fetches data from the EGOV API, truncates if too long, and returns formatted text response.

  async getLawData(args) {
    const { lawNum } = args;
    
    const url = `${EGOV_API_BASE}/lawdata/${encodeURIComponent(lawNum)}`;
    
    try {
      const response = await fetch(url);
      if (!response.ok) {
        throw new Error(`API request failed: ${response.status}`);
      }
      
      const data = await response.text();
      
      return {
        content: [
          {
            type: 'text',
            text: `法令データ（法令番号: ${lawNum}）:\n\n${data.substring(0, 10000)}${data.length > 10000 ? '\n...(省略)' : ''}`,
          },
        ],
      };
    } catch (error) {
      throw new Error(`法令データの取得に失敗しました: ${error.message}`);
    }
  }

• index.js:74-83 (schema)

  Input schema for the get_law_data tool, defining the required 'lawNum' parameter as a string.

  inputSchema: {
    type: 'object',
    properties: {
      lawNum: {
        type: 'string',
        description: '法令番号（例: 平成十七年法律第百十七号）',
      },
    },
    required: ['lawNum'],
  },

• index.js:71-84 (registration)

  Registration of the get_law_data tool in the setTools call, including name, description, and schema.

  {
    name: 'get_law_data',
    description: '法令番号を指定して法令の詳細データを取得します。',
    inputSchema: {
      type: 'object',
      properties: {
        lawNum: {
          type: 'string',
          description: '法令番号（例: 平成十七年法律第百十七号）',
        },
      },
      required: ['lawNum'],
    },
  },

• index.js:110-111 (registration)

  Dispatch/registration in the switch statement that routes calls to the getLawData handler.

  case 'get_law_data':
    return await this.getLawData(args);