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Sync data with FreshBooks
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FreshBooks is a cloud accounting platform widely used by freelancers, self-employed professionals, and small service businesses across North America and the UK. The platform supports invoicing, expense tracking, time tracking, and financial reporting - making it particularly popular in service-based industries where project and time billing are central to the workflow.
Integrate FreshBooks alongside dozens of other accounting and ERP systems through Maesn Unified API.
Dual Identity Model Resolved — accountId and businessId Handled Automatically
FreshBooks requires two different identifiers depending on which resource you access. Maesn resolves both during onboarding and injects the correct identifier into every request automatically.
Rotating Refresh Tokens Managed Reliably — No Integration Breakage on Token Loss
FreshBooks refresh tokens are invalidated on every use and must be replaced immediately. A single storage failure breaks the entire integration for that tenant. Maesn handles the full token rotation lifecycle in the backend — no token management required on your side.
Complete Data on Every Request — include[] and Pagination Handled by Maesn
FreshBooks silently caps responses at 100 results and requires explicit include[] parameters to return related data like invoice lines. Maesn paginates all endpoints automatically and sends the correct includes on every request — you always receive the complete dataset.
"Adding Qonto to our existing integrations was a piece of cake with Maesn. It is a game changer for our customers with all the integration cababilites!"
Juri Preis
CEO @ Smarta
Learn more about FreshBooks API Integration
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Why companies choose Maesn
3 Reasons Why It Is Better To Integrate FreshBooks API With Maesn
Secure & Compliant
We have a strong relationship to FreshBooks. This ensures that the Maesn API is always up-to-date and any maintenance is covered on our end.
Common Data Model
We provide a clean, unified data model that abstracts away system-specific quirks, so teams can build reliable integrations without dealing with ERP-specific complexity or workaround-heavy implementations.
FreshBooks Sandbox
We provide you with everything you need, so you can focus on what counts.
FreshBooks is a cloud accounting platform focused on freelancers and small service businesses, primarily used across North America, the UK, and Australia. It covers invoicing, expenses, time tracking, and project management with a strong focus on simplicity for non-accountants.
The main challenges are: handling two separate identifier types (accountId and businessId) that route to different endpoint groups; managing rotating refresh tokens that invalidate on every use; working around a silent 100-result pagination cap; specifying include[] parameters to retrieve related data; and navigating inconsistent sort syntax between endpoint groups.
FreshBooks refresh tokens rotate on every use — each refresh invalidates the old token and issues a new one. If your system fails to store the new refresh token immediately, the integration breaks for that tenant with no recovery path other than full re-authorization.
accountId is required for accounting resources such as invoices, clients, and expenses. businessId is required for time tracking, projects, and services. Both are returned from the /auth/api/v1/users/me endpoint after authentication but cannot be interchanged — using the wrong identifier causes silent failures or authorization errors.
A direct integration requires resolving two identifier types per tenant, handling rotating refresh tokens reliably, implementing pagination with a silent cap, managing include[] parameters for complete data, and normalizing inconsistent sort syntax — all before shipping your first feature. Maesn handles all of this through a single unified API.
Yes. Maesn supports FreshBooks across all major resource areas. Check the Maesn documentation for FreshBooks for the current endpoint coverage. If anything is missing that is needed for your desired use-case: No problem, reach out to us and we will extend our coverage!
Frequently Asked Questions About FeshBooks API Integration
