FreshBooks APIConnect FreshBooks without building on its API
FreshBooks has a REST API. Any developer can create a FreshBooks account (a free developer signup exists) and register apps in the developer dashboard, and public App Store apps must meet extra requirements. If you're reading the docs because you need FreshBooks to talk to the rest of your stack, Caddi does that without you writing or maintaining integration code: you show it the job once, and it runs it across FreshBooks and your other tools.
- APIREST (JSON)
- AuthOAuth 2.0
- AccessSelf-serve
What the FreshBooks API gives you
- Type
- REST (JSON)
- Authentication
- OAuth 2.0 (authorization code grant)
- Who can get access
- Any developer can create a FreshBooks account (a free developer signup exists) and register apps in the developer dashboard, and public App Store apps must meet extra requirements.
- What it covers
- Clients, invoices, payments, estimates, expenses, bills, time entries, projects, journal entries, reports and webhooks.
- Limits
- No daily request cap, but bursts of calls in a short period are rate-limited with HTTP 429 (no numbers published).
Official docs: freshbooks.com. Checked September 2026. Vendors change access terms, so confirm with FreshBooks before you build.
Building on the FreshBooks API vs. having Caddi run it
| The job | Build it on the API | With Caddi |
|---|---|---|
| Getting access | Register an app, get FreshBooks credentials, and manage tokens and refreshes. | Connect your FreshBooks account once. Caddi holds the connection. |
| Writing the integration | A developer maps fields, handles pagination, retries and rate limits, and writes the sync. | You show Caddi the FreshBooks task the way you'd train a new hire. It writes verified code for it. |
| Steps the API doesn't cover | Screens with no endpoint stay manual, or need a separate RPA tool. | Caddi uses a secure, audited browser session where there's no API, in the same automation. |
| The other systems in the loop | Each extra tool is another API, another set of credentials, another integration to own. | One automation runs across all the tools the job touches. |
| Keeping it running | Someone owns the code when the API version, fields or your process change. | Every automation is reviewed before it runs in production, and every run is logged. |
Building on the API is the right call when you have engineers and the integration is your product. When the goal is getting FreshBooks work off someone's desk, the build is the slow part.
What teams usually want the FreshBooks API for
Time-and-project invoice prep
Caddi assembles the month's invoice from time entries and project data, populates FreshBooks, and routes it for partner review.
Receipt reconciliation
Caddi matches inbound payment receipts to FreshBooks invoices and updates the project record.
Collections loop
Caddi identifies aging FreshBooks invoices, drafts personalized reminders from the partner's account, and logs each touch.
FreshBooks API questions
Does FreshBooks have an API?
Yes. FreshBooks has a REST API, authenticated with OAuth 2.0 (authorization code grant). The official documentation is at https://www.freshbooks.com/api/start.
How do I get access to the FreshBooks API?
Any developer can create a FreshBooks account (a free developer signup exists) and register apps in the developer dashboard, and public App Store apps must meet extra requirements.
Does the FreshBooks API have rate limits?
No daily request cap, but bursts of calls in a short period are rate-limited with HTTP 429 (no numbers published).
Can I connect FreshBooks to my other tools without writing code against its API?
Yes. With Caddi you show the FreshBooks task once, the way you'd train a new hire, and Caddi builds it as verified code that runs across FreshBooks and the other tools the job touches. Where a step has no API, Caddi uses a secure, audited browser session in the same automation.
Do I need a developer to automate FreshBooks with Caddi?
No. There is no integration code for you to write or maintain. Every automation Caddi builds for FreshBooks is reviewed before it runs in production, and every run is logged.
Connect FreshBooks without the build.
Drop your work email and pick a time. We'll show you Caddi running your FreshBooks workflow end to end.