Finance & ERP · Integration
FreshBooks
Add FreshBooks to your product for your customers, and give your AI agents governed access to it.
FreshBooks is built for freelancers and small service businesses that bill for their time, so it covers invoicing, estimates, expenses, projects and time tracking rather than a general ledger. That makes an embedded FreshBooks integration valuable exactly when your product already knows what work happened: turn tracked hours into an invoice, file an expense against the client it belongs to, or move an accepted estimate into a project. Two wrinkles catch teams out. One identity can own several businesses, so every call needs the right business and account id, and access tokens are short-lived and need refreshing often. fastn does both, per tenant, and maintains the connector.
In your product
Embedded for your customers. Per-tenant auth, no per-customer code, maintained by fastn.
Let each business connect their own FreshBooks account so your product turns tracked time into an invoice they can send.
File expenses against the correct client and project, with receipts where the owner expects to find them.
Create estimates from your product and read back whether the client accepted them.
Read invoice and payment status so your product can tell a freelancer who has genuinely paid.
For your AI agents
Governed, audited access for the agents you build, through the MCP server.
An agent totals unbilled time on a project and prepares the invoice for the owner to approve.
An agent finds expenses with no client attached and asks how to code them, changing nothing on its own.
An agent reports which clients are slowest to pay, reading only that business's records.
Example prompt
How many unbilled hours are logged against this client, and what would the invoice come to?
Set up FreshBooks in 4 steps
- 01Enable the FreshBooks connector from your fastn dashboard.
- 02Have each customer authorise their own FreshBooks 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 FreshBooks integration
What you get by embedding it with fastn instead of building it yourself.
- Ship a FreshBooks integration without building it. Your customers connect their own FreshBooks 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 FreshBooks update is not your on-call problem.
- One integration serves your product and your agents. The same governed FreshBooks 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
QuickBooks
Xero
Zoho InvoiceOften used alongside
Tools the same teams tend to run next to FreshBooks, across other categories.
Shopify
Stripe
BigCommerce
AfterShipFreshBooks integration FAQ
How do I add a FreshBooks integration to my product?
Enable the FreshBooks connector in your fastn dashboard, then let each customer authenticate their own FreshBooks account. fastn handles the OAuth flow, token storage and refresh per tenant, so there is no FreshBooks client code in your app and no per-customer branch in your codebase. Setup is 4 steps.
Do my customers each connect their own FreshBooks account?
Yes. Every connection is scoped to the individual customer, so each authorises their own FreshBooks 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 FreshBooks 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 totals unbilled time on a project and prepares the invoice for the owner to approve.
Who maintains the FreshBooks integration?
fastn does. When FreshBooks 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 FreshBooks 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 FreshBooks 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 FreshBooks integration?
A common starting point: let each business connect their own FreshBooks account so your product turns tracked time into an invoice they can send. 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 FreshBooks integration cost?
It is included. Pricing is based on connected accounts, not on how many connectors you enable, so adding FreshBooks does not change your per-connector cost. You can start free with 3 connected accounts.
Add FreshBooks to your product
Start free with 3 connected accounts. No sales call required, and no per-customer integration code.