Google Sheets Rate Assistant

This Node.js application pulls configured Google Sheets documents and exports them as CSV files.

Setup

1. Copy config.example.json to config.json.
2. Configure authentication in config.json — choose one of:

• Service account: place your service account JSON in credentials.json and set credentialsPath, or add one or more entries to the serviceAccounts array (each entry may be a path string or an object with path and optional rateLimitPerMinute).
• API keys: add one or more API keys to the apiKeys array in config.json (each entry may be a string or an object with key and optional rateLimitPerMinute).

3. Install dependencies:

npm install

4. Run the application:

node index.js

Setup Guides

For detailed instructions on authentication methods, please refer to the following guides:

• Service Account Setup
• API Key Setup Guide

Sample config.json

Here is an example config.json matching the repository's config.example.json:

{
  "apiKeys": [
    { "key": "YOUR_API_KEY_1", "rateLimitPerMinute": 50 },
    { "key": "YOUR_API_KEY_2", "rateLimitPerMinute": 50 }
  ],
  "serviceAccounts": [
    { "path": "credentials.json", "rateLimitPerMinute": 50 },
    { "path": "credentials_2.json", "rateLimitPerMinute": 50 }
  ],
  "documents": [
    {
      "documentId": "YOUR_SPREADSHEET_ID",
      "outputDir": "output/your-document",
      "sheets": [
        { "name": "Sheet1", "outputFilename": "sheet1.csv" },
        { "name": "Sheet2", "outputFilename": "sheet2.csv" }
      ]
    }
  ]
}

Your config.json should ONLY contain apiKeys OR serviceAccounts.

Rate limiting

The app enforces a maximum of rateLimitPerMinute requests per minute to avoid exceeding API limits. There is a 5% buffer applied to any limitation to cater for any network fluctuations. A rate limit of 50 will only call 47.5 times (rounded down to 47).

Warning: If you configure multiple apiKeys or serviceAccounts, ensure each credential comes from a different Google Cloud project. Keys or service accounts created within the same project share the same underlying quota and will still hit the same project-level rate limits, causing throttling despite multiple credentials being supplied.

Output

CSV files are written to output by default. Individual documents may override this with their own outputDir in config.json.