Zoho Bookkeeper MCP Server

A Model Context Protocol (MCP) server for Zoho Books integration, designed for bookkeeping workflows with AI agents.

Why This Exists

The official Zoho MCP service (zohomcp.com) has limitations:

• Cannot upload file attachments - The MCP schema incorrectly maps binary file parameters as query strings
• Too many tools - 100+ tools exhaust AI tool limits quickly
• Difficult control over tool selection - The mcp.zoho.com interface is troublesome and cannot be used by agents

This custom MCP server provides:

• Proper multipart/form-data file uploads for attachments
• Curated set of 49 tools for bookkeeping workflows
• Auto-refreshing OAuth tokens (1-hour lifetime with 5-minute buffer)
• Both stdio (CLI) and HTTP stream transports

Features

• Full CRUD operations for journals, expenses, bills, and invoices
• File attachments with proper multipart upload support (PDF, images, Office documents)
• Chart of accounts management and transaction queries
• Bank account integration and transaction listing
• Contact management for customers and vendors
• OAuth 2.0 with automatic token refresh
• Health checks for container orchestration

Available Tools (49 total)

Category	Tools	Description
Organizations	2	List orgs, get org details
Chart of Accounts	4	List/get/create accounts, list transactions
Journals	9	Full CRUD + publish + attachments
Expenses	6	Full CRUD + receipt attachments
Bills	6	Full CRUD + attachments
Invoices	5	List/get + attachments
Contacts	2	List/get customers and vendors
Vendors	4	Vendor-specific list/get/create/update workflows
Bank Accounts	11	List accounts/transactions + matching + categorization workflows

Prerequisites

• Node.js 20+
• Zoho Books account with API access
• Zoho OAuth 2.0 credentials (see Configuration)

Installation

Option 1: Run with npx (Recommended for Desktop Agents)

npx zoho-bookkeeper-mcp

Option 2: Install globally

npm install -g zoho-bookkeeper-mcp
zoho-bookkeeper-mcp

Option 3: Docker

docker build -t zoho-bookkeeper-mcp .
docker run -p 8004:8004 \
  -e ZOHO_CLIENT_ID=your_client_id \
  -e ZOHO_CLIENT_SECRET=your_client_secret \
  -e ZOHO_REFRESH_TOKEN=your_refresh_token \
  zoho-bookkeeper-mcp

Option 4: From source

git clone https://github.com/bu5hm4nn/zoho-bookkeeper-mcp.git
cd zoho-bookkeeper-mcp
pnpm install
pnpm build

Configuration

Run the interactive setup:

pnpm setup

This will guide you through:

1. Creating a Zoho Self-Client application
2. Entering your Client ID and Secret
3. Generating and exchanging an authorization code
4. Saving credentials to .env

Manual Configuration

If you prefer manual setup, copy .env.example to .env and follow the Zoho OAuth Documentation to obtain:

• ZOHO_CLIENT_ID - from Zoho API Console
• ZOHO_CLIENT_SECRET - from Zoho API Console
• ZOHO_REFRESH_TOKEN - obtained via OAuth authorization code flow with scope ZohoBooks.fullaccess.all

Environment Variables

The .env file should contain:

# Required
ZOHO_CLIENT_ID=1000.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
ZOHO_CLIENT_SECRET=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
ZOHO_REFRESH_TOKEN=1000.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

# Optional
ZOHO_API_URL=https://www.zohoapis.com/books/v3  # Default (US datacenter)
ZOHO_ORGANIZATION_ID=123456789                   # Default org ID (optional)
PORT=8004                                         # HTTP server port
HOST=0.0.0.0                                      # HTTP server host

Regional API URLs:

• US (default): https://www.zohoapis.com/books/v3
• EU: https://www.zohoapis.eu/books/v3
• IN: https://www.zohoapis.in/books/v3
• AU: https://www.zohoapis.com.au/books/v3

Integration with Chat Agents

Claude Desktop

Add to your Claude Desktop configuration (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "zoho-bookkeeper": {
      "command": "npx",
      "args": ["zoho-bookkeeper-mcp"],
      "env": {
        "ZOHO_CLIENT_ID": "your_client_id",
        "ZOHO_CLIENT_SECRET": "your_client_secret",
        "ZOHO_REFRESH_TOKEN": "your_refresh_token"
      }
    }
  }
}

Or if installed globally:

{
  "mcpServers": {
    "zoho-bookkeeper": {
      "command": "zoho-bookkeeper-mcp",
      "env": {
        "ZOHO_CLIENT_ID": "your_client_id",
        "ZOHO_CLIENT_SECRET": "your_client_secret",
        "ZOHO_REFRESH_TOKEN": "your_refresh_token"
      }
    }
  }
}

LibreChat

Add to your librechat.yaml:

mcpServers:
  zoho-bookkeeper:
    type: streamable-http
    url: http://mcp-zoho-bookkeeper:8004/mcp
    timeout: 30000

And to your docker-compose.yml:

services:
  mcp-zoho-bookkeeper:
    build:
      context: ./path/to/zoho-bookkeeper-mcp
    container_name: mcp-zoho-bookkeeper
    restart: unless-stopped
    environment:
      PORT: 8004
      ZOHO_CLIENT_ID: ${ZOHO_CLIENT_ID}
      ZOHO_CLIENT_SECRET: ${ZOHO_CLIENT_SECRET}
      ZOHO_REFRESH_TOKEN: ${ZOHO_REFRESH_TOKEN}
    ports:
      - "8004:8004"
    healthcheck:
      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost:8004/health"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 30s

Generic MCP Client (HTTP)

Start the HTTP server:

# Using pnpm
pnpm serve

# Or directly
node dist/server.js

Connect to http://localhost:8004/mcp using streamable-http transport.

Generic MCP Client (stdio)

# Using pnpm
pnpm start

# Or directly
node dist/bin.js

Usage Examples

Get Organization ID (Required First Step)

Most tools require an organization_id. Get it first:

Use the list_organizations tool to get your Zoho organization ID

Create a Journal Entry

Create a journal entry dated 2025-01-15 with:
- Debit Office Supplies (account_id: 123456) for $150
- Credit Business Checking (account_id: 789012) for $150
Reference: "Office supplies purchase"

Attach a Receipt

Upload the file /path/to/receipt.pdf to journal 4567890123456

List Recent Expenses

List all expenses from the last 30 days

Development

Setup

git clone https://github.com/bu5hm4nn/zoho-bookkeeper-mcp.git
cd zoho-bookkeeper-mcp
pnpm install

Commands

pnpm build        # Build TypeScript to dist/
pnpm dev          # Run with hot reload (HTTP server)
pnpm serve:dev    # Same as dev
pnpm start        # Run stdio transport
pnpm serve        # Run HTTP server

pnpm test         # Run all tests
pnpm test:unit    # Run unit tests only
pnpm test:watch   # Run tests in watch mode
pnpm test:coverage # Run tests with coverage

pnpm lint         # Check for linting errors
pnpm lint:fix     # Fix linting errors
pnpm format       # Format code with Prettier
pnpm format:check # Check formatting

Project Structure

zoho-bookkeeper-mcp/
├── src/
│   ├── index.ts           # Main MCP server setup
│   ├── server.ts          # HTTP server entry point
│   ├── bin.ts             # CLI entry point (stdio)
│   ├── config.ts          # Configuration management
│   ├── api/
│   │   ├── client.ts      # Zoho API client helpers
│   │   └── types.ts       # TypeScript type definitions
│   ├── auth/
│   │   └── oauth.ts       # OAuth token management
│   ├── tools/
│   │   ├── organizations.ts
│   │   ├── chart-of-accounts.ts
│   │   ├── journals.ts
│   │   ├── expenses.ts
│   │   ├── bills.ts
│   │   ├── invoices.ts
│   │   ├── contacts.ts
│   │   └── bank-accounts.ts
│   ├── utils/
│   │   ├── errors.ts
│   │   ├── mime-types.ts
│   │   └── response-parser.ts
│   └── __tests__/         # Test files
├── dist/                   # Compiled JavaScript
├── Dockerfile
├── package.json
└── tsconfig.json

API Endpoints

When running as HTTP server:

Endpoint	Description
GET /health	Health check (returns JSON status)
POST /mcp	MCP protocol endpoint (streamable-http)

Troubleshooting

"Invalid OAuth token" errors

1. Verify your refresh token is valid
2. Check that your Zoho app has the ZohoBooks.fullaccess.all scope
3. Ensure the correct regional API URL is set

"Organization not found" errors

1. Use list_organizations first to get valid org IDs
2. Set ZOHO_ORGANIZATION_ID env var for default org

Attachment upload fails

1. Verify the file path is accessible to the server
2. Check file type is supported (PDF, PNG, JPG, GIF, DOC, DOCX, XLS, XLSX)
3. Ensure file size is within Zoho's limits

Rate limiting

This server uses ~3k tokens per request vs ~30k for the hosted Zoho MCP (100+ tools). If you still hit rate limits, add delays between requests.

Tech Stack

• Runtime: Node.js 20+
• Framework: FastMCP
• Language: TypeScript
• Auth: OAuth 2.0 with refresh token flow
• Build: tsup
• Testing: Vitest
• Linting: ESLint + Prettier

License

MIT License - see LICENSE for details.

Contributing

Contributions are welcome! Please open an issue or submit a pull request.

Related Projects

• Model Context Protocol - The protocol specification
• FastMCP - The MCP framework used by this server
• Zoho Books API - Official Zoho Books API documentation