Integrations / Payments, invoicing and accounting

Use AssistCall with FreshBooks

AssistCall answers your business calls 24/7 and can send each call, message and booking to FreshBooks through Webhook, Zapier, Make, n8n.

FreshBooks: FreshBooks is cloud invoicing and accounting software for freelancers and service-based small businesses, with time tracking, estimates and online payments.

Connects

Example call

A prospective client calls about a website redesign. AssistCall takes her name, number and project details, a Zap adds her as a FreshBooks client, and the owner gets the summary by email.

• When AssistCall captures a lead, a Zap runs FreshBooks' Find or Create Client action, so new callers are ready to invoice.
• When AssistCall books a new job, a Zap uses Create Project to set up a FreshBooks project for that client, so the job's time and invoices stay together.
• Forward your phone to AssistCall while you're with clients, and get each call's summary, transcript and recording by email.

How it connects

• Webhook: Signed JSON for every call, message and booking, sent to any HTTPS URL you choose.
• Zapier: Send AssistCall events to a Zap (Webhooks by Zapier, Catch Hook), then use the app's Zapier actions. Needs a paid Zapier plan.
• Make: Start a Make scenario with a custom webhook and use the app's Make modules.
• n8n: Start an n8n workflow with a webhook node, then call the app with its node or an HTTP request.
• Call forwarding: Forward your business line to AssistCall when busy, after hours or always. Works with any carrier.

About FreshBooks's API

• Self-serve API: you can create a key in your account
• Style: REST (JSON)
• Authentication: OAuth 2.0 only. Access tokens expire after 12 hours. Refresh tokens don't expire but can be used only once.
• On Zapier: yes. On Make: yes.

Any FreshBooks user can register a developer app. The API only accepts OAuth 2.0 access tokens, which expire after 12 hours, so AssistCall's live API lookup (which uses one fixed token) can't call FreshBooks directly. FreshBooks webhooks cover clients, invoices, estimates, payments, projects and more. Use Zapier (17 triggers, 25 actions, 7 searches), Make's FreshBooks app, or n8n's HTTP Request node with an OAuth2 credential.

Not included: no one-click FreshBooks app, no listing in FreshBooks's marketplace, no two-way sync, and no partnership with FreshBooks.

Researched by the AssistCall team and checked against FreshBooks's public pages on October 24, 2026. FreshBooks is a trademark of FreshBooks. AssistCall is an independent product of Starling Global LLC and is not affiliated with, endorsed by, sponsored by or approved by FreshBooks.

More Payments, invoicing and accounting integrations

• PayPal: PayPal is an online payments service that small businesses use to accept payments and send invoices that customers can pay online.
• QuickBooks Online: QuickBooks Online is Intuit's cloud accounting software that small businesses use for invoicing, payments, expenses and bookkeeping.
• Square: Square is Block's payments and point-of-sale platform that small businesses use to take card payments, send invoices and keep a customer directory.
• Stripe: Stripe is an online payments platform that businesses use to take card payments, bill customers, run subscriptions and send invoices.
• Authorize.net: Authorize.net is Visa's payment gateway that small businesses use, through a merchant account, to accept card and eCheck payments online, in person and over the phone.
• BILL: BILL is accounts payable, accounts receivable and spend management software that small and midsize businesses use to pay bills, send invoices and get paid.

All product and company names in this directory are trademarks or registered trademarks of their respective owners, used only to identify systems AssistCall can send call information to or receive information from. Their use does not imply any affiliation with or endorsement by their owners. AssistCall connects using signed webhooks, the business's own API keys, automation platforms (Zapier, Make, n8n) the business sets up in its own account, and call forwarding. AssistCall does not provide one-click connectors, marketplace apps, certifications or two-way record or calendar sync, and does not sign HIPAA business associate agreements. Vendor features, plans and API access can change; information last checked October 24, 2026.