Google Apps Script MCP Server

Instructions

Implementation Reference

• tools/google-app-script-api/apps-script-api/script-projects-get-content.js:17-128 (handler)

  The main handler function that performs the HTTP GET request to retrieve the content of a Google Apps Script project using OAuth authentication.

  const executeFunction = async ({ scriptId, versionNumber, fields, alt = "json", key, access_token, prettyPrint = "true" }) => {
    const baseUrl = 'https://script.googleapis.com';
    const startTime = Date.now();
    
    try {
      logger.info('SCRIPT_GET_CONTENT', 'Starting script content retrieval', { scriptId, versionNumber });
  
      // Get OAuth access token
      const token = await getOAuthAccessToken();
      
      // Construct the URL with query parameters
      const url = new URL(`${baseUrl}/v1/projects/${scriptId}/content`);
      if (versionNumber) url.searchParams.append('versionNumber', versionNumber);
      if (fields) url.searchParams.append('fields', fields);
      url.searchParams.append('alt', alt);
      if (key) url.searchParams.append('key', key);
      if (prettyPrint) url.searchParams.append('prettyPrint', prettyPrint);
  
      logger.debug('SCRIPT_GET_CONTENT', 'Constructed API URL', {
        url: url.toString(),
        pathSegments: url.pathname.split('/'),
        queryParams: Object.fromEntries(url.searchParams)
      });
  
      // Set up headers for the request
      const headers = {
        'Accept': 'application/json',
        'Authorization': `Bearer ${token}`
      };
  
      logger.logAPICall('GET', url.toString(), headers);
  
      // Perform the fetch request
      const fetchStartTime = Date.now();
      const response = await fetch(url.toString(), {
        method: 'GET',
        headers
      });
      
      const fetchDuration = Date.now() - fetchStartTime;
      const responseSize = response.headers.get('content-length') || 'unknown';
      
      logger.logAPIResponse('GET', url.toString(), response.status, fetchDuration, responseSize);
  
      // Check if the response was successful
      if (!response.ok) {
        const errorText = await response.text();
        let errorData;
        
        try {
          errorData = JSON.parse(errorText);
        } catch (parseError) {
          errorData = { message: errorText };
        }
  
        const detailedError = {
          status: response.status,
          statusText: response.statusText,
          url: url.toString(),
          errorResponse: errorData,
          duration: Date.now() - startTime,
          scriptId,
          versionNumber,
          timestamp: new Date().toISOString()
        };
  
        logger.error('SCRIPT_GET_CONTENT', 'API request failed', detailedError);
        
        console.error('❌ API Error Details:', JSON.stringify(detailedError, null, 2));
        
        throw new Error(`API Error (${response.status}): ${errorData.error?.message || errorData.message || 'Unknown error'}`);
      }
  
      // Parse and return the response data
      const data = await response.json();
      
      logger.info('SCRIPT_GET_CONTENT', 'Successfully retrieved script content', {
        scriptId,
        versionNumber,
        filesCount: data.files?.length || 0,
        duration: Date.now() - startTime
      });
      
      console.log('✅ Successfully retrieved script content');
      return data;
    } catch (error) {
      const errorDetails = {
        message: error.message,
        stack: error.stack,
        scriptId,
        versionNumber,
        duration: Date.now() - startTime,
        timestamp: new Date().toISOString(),
        errorType: error.name || 'Unknown'
      };
  
      logger.error('SCRIPT_GET_CONTENT', 'Error getting script project content', errorDetails);
      
      console.error('❌ Error getting script project content:', errorDetails);
      
      // Return detailed error information for debugging
      return { 
        error: true,
        message: error.message,
        details: errorDetails,
        rawError: {
          name: error.name,
          stack: error.stack
        }
      };
    }
  };

• tools/google-app-script-api/apps-script-api/script-projects-get-content.js:134-179 (schema)

  Defines the MCP tool schema, including the function name, description, parameters (with scriptId required), and references the handler function.

  const apiTool = {
    function: executeFunction,
    definition: {
      type: 'function',
      function: {
        name: 'script_projects_get_content',
        description: 'Get the content of a Google Apps Script project.',
        parameters: {
          type: 'object',
          properties: {
            scriptId: {
              type: 'string',
              description: 'The ID of the script project to retrieve content for.'
            },
            versionNumber: {
              type: 'string',
              description: 'The version number of the script project.'
            },
            fields: {
              type: 'string',
              description: 'Selector specifying which fields to include in a partial response.'
            },
            alt: {
              type: 'string',
              description: 'Data format for response.'
            },
            key: {
              type: 'string',
              description: 'API key for the project.'
            },
            access_token: {
              type: 'string',
              description: 'OAuth access token.'
            },
            prettyPrint: {
              type: 'string',
              description: 'Returns response with indentations and line breaks.'
            }
          },
          required: ['scriptId']
        }
      }
    }
  };
  
  export { apiTool };

• tools/paths.js:14-14 (registration)

  The tool file path is listed in toolPaths array, enabling dynamic import and registration during tool discovery.

  'google-app-script-api/apps-script-api/script-projects-get-content.js',

• lib/tools.js:8-64 (registration)

  The discoverTools function dynamically imports and registers all tools, including script_projects_get_content, by loading modules from toolPaths and extracting their apiTool.

  export async function discoverTools() {
    logger.info('DISCOVERY', `Starting tool discovery for ${toolPaths.length} tool paths`);
    
    const toolPromises = toolPaths.map(async (file) => {
      try {
        logger.debug('DISCOVERY', `Loading tool from: ${file}`);
        const module = await import(`../tools/${file}`);
        
        if (!module.apiTool) {
          logger.warn('DISCOVERY', `Tool file missing apiTool export: ${file}`);
          return null;
        }
  
        const toolName = module.apiTool.definition?.function?.name;
        if (!toolName) {
          logger.warn('DISCOVERY', `Tool missing function name: ${file}`);
          return null;
        }
  
        // Wrap the original function with logging
        const originalFunction = module.apiTool.function;
        const wrappedFunction = withLogging(toolName, originalFunction);
  
        logger.debug('DISCOVERY', `Successfully loaded tool: ${toolName}`, {
          file,
          toolName,
          description: module.apiTool.definition?.function?.description
        });
  
        return {
          ...module.apiTool,
          function: wrappedFunction,
          path: file,
        };
      } catch (error) {
        logger.error('DISCOVERY', `Failed to load tool: ${file}`, {
          file,
          error: {
            message: error.message,
            stack: error.stack
          }
        });
        return null;
      }
    });
    
    const tools = (await Promise.all(toolPromises)).filter(Boolean);
    
    logger.info('DISCOVERY', `Tool discovery completed`, {
      totalPaths: toolPaths.length,
      successfullyLoaded: tools.length,
      failed: toolPaths.length - tools.length,
      toolNames: tools.map(t => t.definition?.function?.name).filter(Boolean)
    });
    
    return tools;
  }