Create a record in NetSuite using the SuiteTalk REST API

In-depth guide

Steps

1. Configure OAuth 1.0a credentials in NetSuite (Integration record + Access Token); collect the account ID, consumer key/secret, and token key/secret.
2. Construct the base URL using your account ID: https://{accountId}.suitetalk.api.netsuite.com/services/rest/record/v1/{recordType}.
3. Sign the HTTP request using OAuth 1.0a signature method (HMAC-SHA256); include the Authorization header with oauth_consumer_key, oauth_token, oauth_signature_method, oauth_timestamp, oauth_nonce, and oauth_signature.
4. POST the record body as JSON; for example, to create a vendor bill, include entity (vendor internal ID), tranDate, and itemList or expenseList arrays.
5. Parse the 204 response; the Location header contains the URL of the newly created record, from which you can extract the internal ID.
6. To read the record back, issue a GET to the URL from the Location header.