How to integrate Netsuite MCP with Claude Code

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Introduction

Manage your Netsuite directly from Claude Code with zero worries about OAuth hassles, API-breaking issues, or reliability and security concerns.

You can do this in two different ways:

  1. Via Composio Connect - Direct and easiest approach
  2. Via Composio SDK - Programmatic approach with more control

Also integrate Netsuite with

Why use Composio?

  • Only one MCP URL to connect multiple apps with Claude Code with zero auth hassles.
  • Programmatic tool calling allows LLMs to write its code in a remote workbench to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
  • Handling Large tool responses out of LLM context to minimize context rot.
  • Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so LLMs aren't overwhelmed by tools you don't need.

Connecting Netsuite to Claude Code using Composio

1. Add the Composio MCP to Claude

Terminal

2. Start Claude Code

bash
claude

3. Open your MCP list

bash
/mcp

4. Select Composio and click on Authenticate

Select Composio and click Authenticate

5. This will redirect you to the Composio OAuth page. Complete the flow by authorizing Composio and you're all set.

Composio OAuth authorization page
Composio authorization complete
Ask Claude to connect to your account and authenticate via the link

Supported Tools & Triggers

Tools
Get Async Job StatusRetrieves the current status of an asynchronous NetSuite REST job.
Get Async Job TaskRetrieves the task reference (task ID and URL) for an asynchronous job in NetSuite.
Async Get Job Task ResultTool to retrieve the payload result of a completed async task.
Create CustomerCreates a new customer record in NetSuite.
Create Customer PaymentCreates a customer payment record in NetSuite.
Create EmployeeCreates a new employee record in NetSuite.
Create InvoiceTool to create a new invoice record.
Create ItemCreates a new item record in NetSuite via REST API.
Create Journal EntryTool to create a new journal entry record.
Create JWT Client AssertionTool to build a JWT client assertion for NetSuite OAuth2 client credentials.
Create Purchase OrderTool to create a new purchase order record.
Create RecordCreates a new NetSuite record of any type (customer, vendor, invoice, sales order, etc.
Create Sales OrderTool to create a new sales order record in NetSuite.
Create VendorCreates a new vendor record in NetSuite.
Create Vendor BillTool to create a new vendor bill record.
Delete CustomerTool to delete a customer record by ID.
Delete Customer PaymentDelete a customer payment record from NetSuite by its ID.
Delete EmployeeDeletes an employee record from NetSuite by its internal ID.
Delete InvoiceTool to delete an invoice record by ID.
Delete ItemTool to delete an item record by its type and ID.
Delete Item FulfillmentTool to delete an Item Fulfillment record.
Delete Item ReceiptTool to delete an item receipt record by ID.
Delete Journal EntryTool to delete a journal entry record by ID.
Delete Purchase OrderTool to delete a purchase order record by ID.
Delete Sales OrderTool to delete a sales order by internal ID.
Delete Vendor PaymentTool to delete a vendor payment record by ID.
Execute DatasetTool to execute a SuiteAnalytics dataset and return paged results.
Get CustomerTool to retrieve a customer record by internal ID.
Get Customer PaymentTool to retrieve a customer payment record by ID.
Get Data Center URLsTool to discover account-specific service domains.
Get EmployeeTool to retrieve an employee record by ID.
Get Governance LimitsRetrieve NetSuite account and integration concurrency governance limits.
Get InvoiceTool to retrieve an invoice record by internal ID.
Get ItemTool to retrieve an item record by internal ID.
Get Item FulfillmentTool to retrieve an item fulfillment record by internal ID.
Get Item ReceiptTool to retrieve an item receipt record by internal ID.
Get Journal EntryTool to retrieve a journal entry by internal ID.
Get Purchase OrderRetrieves complete details of a purchase order by its internal ID using the NetSuite REST API.
Get Record MetadataRetrieves the complete metadata schema for a NetSuite record type, including all field definitions, data types, constraints, and descriptions.
Get Reference Select FieldRetrieves the complete record referenced by a select-type field on a parent record.
Get Sales OrderTool to retrieve a sales order record by internal ID.
Get Server TimeTool to retrieve NetSuite server time in UTC.
Get Sublist CollectionTool to retrieve a sublist collection from a parent record.
Get Sublist LineTool to retrieve a specific line from a sublist of a record.
Get SubrecordRetrieves a specific subrecord from a parent NetSuite record.
Get VendorTool to get a single vendor record by internal ID.
Get Vendor BillRetrieve a vendor bill record by its internal ID.
Get Vendor PaymentRetrieves a single vendor payment record by its internal ID from NetSuite.
List Customer PaymentsTool to list customer payment records.
List DatasetsTool to list SuiteAnalytics Workbook datasets.
List EmployeesTool to list employee records.
List IntegrationsTool to list integration applications.
List InvoicesTool to list invoice records.
List Item FulfillmentsTool to list item fulfillment records.
List Item ReceiptsTool to list item receipt records.
List Journal EntriesTool to list journal entry records.
List Metadata CatalogTool to list all record types and their metadata.
List Purchase OrdersTool to list purchase order records.
List RecordsTool to list record instances.
List Sales OrdersTool to list sales order records.
List Vendor PaymentsTool to list vendor payment records.
OAuth2 Authorize Account DomainTool to construct an OAuth2 authorization URL for a NetSuite account-specific domain.
OAuth2 Authorize System DomainInitiates the OAuth2 authorization code flow using NetSuite's system domain endpoint.
Get OAuth2 JWKS KeysTool to retrieve OAuth2 JWKS public keys.
OAuth2 LogoutTool to revoke an ID token and its associated access and refresh tokens.
Revoke OAuth2 Refresh TokenRevokes a NetSuite OAuth2 refresh token and all associated access tokens, immediately invalidating them.
Exchange OAuth2 Authorization Code for TokensExchange an OAuth2 authorization code for access and refresh tokens using the NetSuite token endpoint.
OAuth2 Token Client CredentialsTool to obtain an OAuth2 access token via client credentials grant.
OAuth2 Token RefreshTool to refresh an OAuth2 access token.
Run SuiteQL QueryTool to execute a SuiteQL query.
Transform RecordTransform an existing NetSuite record into another record type (e.
Update CustomerUpdates an existing NetSuite customer record using PATCH semantics - only fields included in the 'data' parameter are modified.
Update Customer PaymentTool to update an existing customer payment by ID.
Update EmployeeTool to update an employee record by ID.
Update InvoiceUpdates an existing NetSuite invoice record by ID using the PATCH method.
Update ItemTool to update an item record by ID.
Update Item FulfillmentTool to update an Item Fulfillment record by ID.
Update Item ReceiptTool to update an item receipt record by ID.
Update Journal EntryTool to update a journal entry record by ID.
Update Purchase OrderTool to update a purchase order record by ID.
Update Sales OrderUpdates an existing NetSuite sales order record by ID using PATCH semantics.
Update VendorTool to update a vendor record by ID.
Update Vendor BillTool to update a vendor bill record by ID.
Update Vendor PaymentTool to update a vendor payment record by ID.
Upsert Record by External IDTool to create or update a record by external ID.

What is the Netsuite MCP server, and what's possible with it?

The Netsuite MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Netsuite account. It provides structured and secure access to your business data, so your agent can perform actions like creating invoices, managing inventory, tracking customer records, and automating financial workflows on your behalf.

  • Automated invoice creation and management: Let your agent generate, send, and update invoices for customers, streamlining your accounts receivable process.
  • Real-time inventory control: Ask your agent to check stock levels, update inventory records, and manage supply chain transactions seamlessly.
  • Customer and vendor record management: Have the agent create, update, or retrieve customer and vendor profiles, keeping your CRM data fresh and accurate.
  • Financial reporting and analytics: Direct your agent to pull balance sheets, profit & loss statements, or transaction histories for up-to-date business insights.
  • Order processing automation: Enable your agent to create sales orders, manage purchase orders, and track fulfillment status across your operations.

Connecting Netsuite via Composio SDK

Composio SDK is the underlying tech that powers Rube. It's a universal gateway that does everything Rube does but with much more programmatic control. You can programmatically generate an MCP URL with the app you need (here Netsuite) for even more tool search precision. It's secure and reliable.

How the Composio SDK works

The Composio SDK follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Prerequisites

Before starting, make sure you have:
  • Claude Pro, Max, or API billing enabled Anthropic account
  • Composio API Key
  • A Netsuite account
  • Basic knowledge of Python or TypeScript

Install Claude Code

bash
# macOS, Linux, WSL
curl -fsSL https://claude.ai/install.sh | bash

# Windows PowerShell
irm https://claude.ai/install.ps1 | iex

# Windows CMD
curl -fsSL https://claude.ai/install.cmd -o install.cmd && install.cmd && del install.cmd

To install Claude Code, use one of the following methods based on your operating system:

Set up Claude Code

bash
cd your-project-folder
claude

Open a terminal, go to your project folder, and start Claude Code:

  • Claude Code will open in your terminal
  • Follow the prompts to sign in with your Anthropic account
  • Complete the authentication flow
  • Once authenticated, you can start using Claude Code
Claude Code initial setup showing sign-in prompt
Claude Code terminal after successful login

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here

Create a .env file in your project root with the following variables:

  • COMPOSIO_API_KEY authenticates with Composio (get it from Composio dashboard)
  • USER_ID identifies the user for session management (use any unique identifier)

Install Composio library

pip install composio-core python-dotenv

Install the Composio Python library to create MCP sessions.

  • composio-core provides the core Composio functionality
  • python-dotenv loads environment variables from your .env file

Generate Composio MCP URL

import os
from composio import Composio
from dotenv import load_dotenv

load_dotenv()

COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
USER_ID = os.getenv("USER_ID")

composio_client = Composio(api_key=COMPOSIO_API_KEY)

composio_session = composio_client.create(
    user_id=USER_ID,
    toolkits=["netsuite"],
)

COMPOSIO_MCP_URL = composio_session.mcp.url

print(f"MCP URL: {COMPOSIO_MCP_URL}")
print(f"\nUse this command to add to Claude Code:")
print(f'claude mcp add --transport http netsuite-composio "{COMPOSIO_MCP_URL}" --headers "X-API-Key:{COMPOSIO_API_KEY}"')

Create a script to generate a Composio MCP URL for Netsuite. This URL will be used to connect Claude Code to Netsuite.

What's happening:
  • We import the Composio client and load environment variables
  • Create a Composio instance with your API key
  • Call create() to create a Tool Router session for Netsuite
  • The returned mcp.url is the MCP server URL that Claude Code will use
  • The script prints this URL so you can copy it

Run the script and copy the MCP URL

python generate_mcp_url.py

Run your Python script to generate the MCP URL.

  • The script connects to Composio and creates a Tool Router session
  • It prints the MCP URL and the exact command you need to run
  • Copy the entire claude mcp add command from the output

Add Netsuite MCP to Claude Code

bash
claude mcp add --transport http netsuite-composio "YOUR_MCP_URL_HERE" --headers "X-API-Key:YOUR_COMPOSIO_API_KEY"

# Then restart Claude Code
exit
claude

In your terminal, add the MCP server using the command from the previous step. The command format is:

  • claude mcp add registers a new MCP server with Claude Code
  • --transport http specifies that this is an HTTP-based MCP server
  • The server name (netsuite-composio) is how you'll reference it
  • The URL points to your Composio Tool Router session
  • --headers includes your Composio API key for authentication

After running the command, close the current Claude Code session and start a new one for the changes to take effect.

Verify the installation

bash
claude mcp list

Check that your Netsuite MCP server is properly configured.

  • This command lists all MCP servers registered with Claude Code
  • You should see your netsuite-composio entry in the list
  • This confirms that Claude Code can now access Netsuite tools

If everything is wired up, you should see your netsuite-composio entry listed:

Claude Code MCP list showing the toolkit MCP server

Authenticate Netsuite

The first time you try to use Netsuite tools, you'll be prompted to authenticate.

  • Claude Code will detect that you need to authenticate with Netsuite
  • It will show you an authentication link
  • Open the link in your browser (or copy/paste it)
  • Complete the Netsuite authorization flow
  • Return to the terminal and start using Netsuite through Claude Code

Once authenticated, you can ask Claude Code to perform Netsuite operations in natural language. For example:

  • "Generate monthly profit and loss report"
  • "List overdue invoices for all customers"
  • "Create new sales order for a client"

Complete Code

Here's the complete code to get you started with Netsuite and Claude Code:

import os
from composio import Composio
from dotenv import load_dotenv

load_dotenv()

COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
USER_ID = os.getenv("USER_ID")

composio_client = Composio(api_key=COMPOSIO_API_KEY)

composio_session = composio_client.create(
    user_id=USER_ID,
    toolkits=["netsuite"],
)

COMPOSIO_MCP_URL = composio_session.mcp.url

print(f"MCP URL: {COMPOSIO_MCP_URL}")
print(f"\nUse this command to add to Claude Code:")
print(f'claude mcp add --transport http netsuite-composio "{COMPOSIO_MCP_URL}" --headers "X-API-Key:{COMPOSIO_API_KEY}"')

Conclusion

You've successfully integrated Netsuite with Claude Code using Composio's MCP server. Now you can interact with Netsuite directly from your terminal using natural language commands.

Key features of this setup:

  • Terminal-native experience without switching contexts
  • Natural language commands for Netsuite operations
  • Secure authentication through Composio's managed MCP
  • Tool Router for dynamic tool discovery and execution

Next steps:

  • Try asking Claude Code to perform various Netsuite operations
  • Add more toolkits to your Tool Router session for multi-app workflows
  • Integrate this setup into your development workflow for increased productivity

You can extend this by adding more toolkits, implementing custom workflows, or building automation scripts that leverage Claude Code's capabilities.

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FAQ

What are the differences in Tool Router MCP and Netsuite MCP?

With a standalone Netsuite MCP server, the agents and LLMs can only access a fixed set of Netsuite tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Netsuite and many other apps based on the task at hand, all through a single MCP endpoint.

Can I use Tool Router MCP with Claude Code?

Yes, you can. Claude Code fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Netsuite tools.

Can I manage the permissions and scopes for Netsuite while using Tool Router?

Yes, absolutely. You can configure which Netsuite scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Netsuite data and credentials are handled as safely as possible.

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