Finance & ERP · Integration
NetSuite
Add NetSuite to your product for your customers, and give your AI agents governed access to it.
Give your customers a NetSuite integration inside your product so the finance work your app already generates lands in their ledger instead of a spreadsheet. Reads and writes cover invoices, vendor bills, journal entries, customers, items and saved searches, plus the custom records and custom fields almost every NetSuite account grows over time. The awkward part is that NetSuite is per-account by design: endpoints carry the account id, a sandbox account does not behave like production, subsidiaries and accounting periods differ, and concurrency governance is enforced account-wide rather than per integration. fastn keeps the per-tenant credentials, token refresh, request concurrency and endpoint changes on its side of the line.
In your product
Embedded for your customers. Per-tenant auth, no per-customer code, maintained by fastn.
Let each customer connect their own NetSuite account so your product posts invoices and vendor bills straight into their ledger.
Read customers, items and accounting periods so your product uses values that already exist in the account rather than defaults.
Push a journal entry when your product closes out a billing run, against the right subsidiary.
Map the custom records and custom fields a NetSuite account has accumulated as per-tenant configuration instead of a code branch.
For your AI agents
Governed, audited access for the agents you build, through the MCP server.
An agent reads open invoices and aged receivables for one tenant before it answers a collections question.
An agent creates a vendor bill from an approved purchase in your product, with the write attributed and logged.
An agent explains which subsidiary and accounting period a transaction landed in by reading the record itself.
Example prompt
Show invoices more than 30 days overdue for this subsidiary and total the exposure.
Set up NetSuite in 4 steps
- 01Enable the NetSuite connector from your fastn dashboard.
- 02Have each customer authorise their own NetSuite account, so calls run under their credentials rather than a shared key.
- 03Decide which invoices, payments and vendors your product needs, map those fields, then enable the actions and triggers you want.
- 04Call it from your product and expose it to your agents through the same governed connection.
Why teams use the NetSuite integration
What you get by embedding it with fastn instead of building it yourself.
- Ship a NetSuite integration without building it. Your customers connect their own NetSuite account inside your product and work their invoices, payments and vendors there, with no per-customer code on your side.
- Handle the part that actually costs time: financial writes must be idempotent and reconcilable, because a duplicate is an accounting problem rather than a bug. fastn owns the auth, token refresh, rate limits, pagination and breaking-change fixes, so a NetSuite update is not your on-call problem.
- One integration serves your product and your agents. The same governed NetSuite connection powers in-product features and gives AI agents scoped, audited access, so you move financial records without hand-keying them between systems without wiring it twice.
Used by these teams
Compare with
Sage Intacct
Acumatica
Oracle ERP CloudOften used alongside
Tools the same teams tend to run next to NetSuite, across other categories.
Shopify
Stripe
BigCommerce
AfterShipNetSuite integration FAQ
How do I add a NetSuite integration to my product?
Enable the NetSuite connector in your fastn dashboard, then let each customer authenticate their own NetSuite account. fastn handles the OAuth flow, token storage and refresh per tenant, so there is no NetSuite client code in your app and no per-customer branch in your codebase. Setup is 4 steps.
Do my customers each connect their own NetSuite account?
Yes. Every connection is scoped to the individual customer, so each authorises their own NetSuite account and only ever sees their own invoices, payments and vendors. That per-tenant isolation is the point of an embedded integration: you support the long tail of customer setups without maintaining an integration per customer.
Can AI agents use this NetSuite integration?
Yes. The same connection is exposed to your agents through the fastn MCP gateway, with permissions scoped per tenant and every call audited. An agent reads open invoices and aged receivables for one tenant before it answers a collections question.
Who maintains the NetSuite integration?
fastn does. When NetSuite changes an endpoint, deprecates a field or alters its auth, the fix lands in the connector rather than in your backlog, and your customers' connections keep working.
Is the NetSuite integration safe for financial writes?
Writes are idempotent, so a retry after a timeout does not post a document twice, and every call is logged per tenant so an entry can be traced back to the event that created it. That matters more in finance than anywhere else, because a duplicate is a number somebody has to explain.
Can it handle each customer's own chart of accounts?
Yes. ERP deployments are configured to the business, so account structures, required fields and fiscal calendars differ per customer. Those are mapped per tenant as configuration, not hard-coded.
What about NetSuite rate limits during a first import?
Backfills are throttled deliberately. ERP limits are often account-wide rather than per-integration, so an unthrottled import can exhaust a customer's allowance and disrupt their other integrations.
What can I build with the NetSuite integration?
A common starting point: let each customer connect their own NetSuite account so your product posts invoices and vendor bills straight into their ledger. Teams also use it for the other use cases listed above, and expose it to agents for governed reads and writes.
How much does the NetSuite integration cost?
It is included. Pricing is based on connected accounts, not on how many connectors you enable, so adding NetSuite does not change your per-connector cost. You can start free with 3 connected accounts.
Add NetSuite to your product
Start free with 3 connected accounts. No sales call required, and no per-customer integration code.