Google Apps Script MCP Server

Instructions

Implementation Reference

• tools/google-app-script-api/apps-script-api/script-scripts-run.js:18-81 (handler)

  Handler function that executes the 'script_run' tool by making an authenticated POST request to the Google Apps Script API endpoint `/v1/scripts/{scriptId}:run`.

  const executeFunction = async ({ scriptId, fields, alt = 'json', key, access_token, oauth_token, quotaUser, prettyPrint = true }) => {
    const baseUrl = 'https://script.googleapis.com';
    const url = new URL(`${baseUrl}/v1/scripts/${scriptId}:run`);
    
    // Append query parameters to the URL
    const params = new URLSearchParams({
      fields,
      alt,
      key,
      access_token,
      oauth_token,
      quotaUser,
      prettyPrint: prettyPrint.toString(),
      '$.xgafv': '1',
      upload_protocol: 'raw',
      uploadType: 'raw'
    });
    
    url.search = params.toString();
  
    try {
      // Get OAuth headers
      const headers = await getAuthHeaders();
      headers['Content-Type'] = 'application/json';
      // Perform the fetch request
      const response = await fetch(url.toString(), {
        method: 'POST',
        headers
      });
  
      // Check if the response was successful
      if (!response.ok) {
        const errorData = await response.json();
        throw new Error(errorData);
      }
  
      // Parse and return the response data
      const data = await response.json();
      return data;
    } catch (error) {
      const errorDetails = {
        message: error.message,
        stack: error.stack,
        scriptId,
        timestamp: new Date().toISOString(),
        errorType: error.name || 'Unknown'
      };
  
      logger.error('SCRIPT_RUN', 'Error running the script', errorDetails);
      
      console.error('❌ Error running the script:', 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-scripts-run.js:90-134 (schema)

  Schema definition for the 'script_run' tool, specifying input parameters and required fields.

    type: 'function',
    function: {
      name: 'script_run',
      description: 'Run a Google Apps Script.',
      parameters: {
        type: 'object',
        properties: {
          scriptId: {
            type: 'string',
            description: 'The ID of the script to run.'
          },
          fields: {
            type: 'string',
            description: 'Selector specifying which fields to include in a partial response.'
          },
          alt: {
            type: 'string',
            enum: ['json', 'xml'],
            description: 'Data format for response.'
          },
          key: {
            type: 'string',
            description: 'API key for the project.'
          },
          access_token: {
            type: 'string',
            description: 'OAuth access token.'
          },
          oauth_token: {
            type: 'string',
            description: 'OAuth 2.0 token for the current user.'
          },
          quotaUser: {
            type: 'string',
            description: 'Available to use for quota purposes for server-side applications.'
          },
          prettyPrint: {
            type: 'boolean',
            description: 'Returns response with indentations and line breaks.'
          }
        },
        required: ['scriptId']
      }
    }
  }

• lib/tools.js:8-64 (registration)

  Central tool registration via dynamic discovery of all `apiTool` exports from paths listed in tools/paths.js, including the 'script_run' tool.

  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;
  }

• tools/paths.js:1-18 (registration)

  Explicit listing of tool paths for discovery, including 'google-app-script-api/apps-script-api/script-scripts-run.js' at line 10.

  export const toolPaths = [
    'google-app-script-api/apps-script-api/script-projects-deployments-delete.js',
    'google-app-script-api/apps-script-api/script-projects-create.js',
    'google-app-script-api/apps-script-api/script-projects-versions-create.js',
    'google-app-script-api/apps-script-api/script-projects-deployments-create.js',
    'google-app-script-api/apps-script-api/script-projects-deployments-update.js',
    'google-app-script-api/apps-script-api/script-projects-deployments-list.js',
    'google-app-script-api/apps-script-api/script-projects-update-content.js',
    'google-app-script-api/apps-script-api/script-projects-deployments-get.js',
    'google-app-script-api/apps-script-api/script-scripts-run.js',
    'google-app-script-api/apps-script-api/script-projects-get.js',
    'google-app-script-api/apps-script-api/script-processes-list-script-processes.js',
    'google-app-script-api/apps-script-api/script-projects-get-metrics.js',
    'google-app-script-api/apps-script-api/script-projects-get-content.js',
    'google-app-script-api/apps-script-api/script-projects-versions-list.js',
    'google-app-script-api/apps-script-api/script-projects-versions-get.js',
    'google-app-script-api/apps-script-api/script-processes-list.js'
  ];