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.

AI Disclosure

A large chunk of the project was coded using AI, this is the first pass at integrating some AI assistance into my projects. However all code written has been verified and checked before submission. AI use has only been included since the v2 rewrite. While this project isn't intended for general usage i've chosen to be clear on the subject.