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Overview

To authenticate with NetSuite using Client Credentials, you will need:
  1. Account ID - Your NetSuite account ID
  2. Client ID - From your NetSuite integration record
  3. Certificate ID - The ID of the certificate registered in your NetSuite integration
  4. Private Key - The RSA private key (PEM format) used to sign the JWT assertion
This guide will walk you through finding each of these values.

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Prerequisites:

  • You must have an Administrator role in NetSuite to create integrations and register certificates

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Instructions:

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Step 1: Enable required features

  1. Log in to NetSuite and navigate to Setup → Company → Enable Features.
  2. Under the SuiteTalk tab, enable REST WEB SERVICES.
  3. Under the Manage Authentication tab, enable OAUTH 2.0.
  4. Save your changes.

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Step 2: Create an integration record and get your Client ID

  1. Navigate to Setup → Integration → Manage Integrations → New.
  2. Set a name (e.g., Nango Client Credentials).
  3. Under Authentication, enable CLIENT CREDENTIALS (MACHINE TO MACHINE) GRANT and disable all other grant types.
  4. Save the integration.
  5. Copy the Client ID displayed after saving — you won’t be able to retrieve it again.

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Step 3: Generate an RSA key pair

Generate a 2048-bit (or larger) RSA key pair: 
openssl genrsa -out private_key.pem 2048
openssl rsa -in private_key.pem -pubout -out public_key.pem
Keep private_key.pem secure — you’ll paste it into the Private Key field. The public_key.pem is uploaded to NetSuite in the next step.

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Step 4: Register the certificate and get your Certificate ID

  1. Navigate to Setup → Integration → Manage Authentication → OAuth 2.0 Client Credentials (M2M) Setup.
  2. Click Create New.
  3. In the popup, select the entity (the user this integration runs as), role, and application (the integration you created in step 2).
  4. Upload your public_key.pem.
  5. Click Save and copy the Certificate ID displayed.

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Step 5: Find your Account ID

Your Account ID appears in your NetSuite URL — for example, if your URL is https://1234567.app.netsuite.com, your Account ID is 1234567. You can also find it under Setup → Company → Company Information → Account ID.

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Step 6: Enter your credentials in the Connect UI

  1. Open the form where you need to authenticate with NetSuite.
  2. Enter your Account ID, Client ID, Certificate ID, and paste the full contents of private_key.pem (including the -----BEGIN RSA PRIVATE KEY----- header and footer) into the Private Key field.
  3. Submit the form.
NetSuite Client Credentials connection form You are now connected to NetSuite (Client Credentials).