Connect Harpoon and FastBill
Integrate Harpoon with FastBill to automate workflows, sync data between apps, and eliminate repetitive tasks with AI-powered automation.
Popular Harpoon + FastBill flows
Start from a real workflow other teams are already running.
Choose a trigger
Harpoon
When this happens...
New Client
New Project
New Expense Category
Choose an action
FastBill
Automatically do this!
Create Customer
Create Invoice
Add Payment for Invoice
Send Invoice by Email
Create Revenue
Add Payment for Revenue
Create Offer
Search Customer
Search Invoice
Canceling an Invoice
Create Customer in Fastbill when New Client in Harpoon
Use this flowCreate Invoice in FastBill when New Client in Harpoon
Use this flowAdd Payment for Invoice to FastBill when New Client in Harpoon
Use this flowSend Invoice by Email using FastBill when New Client in Harpoon
Use this flowCreate Revenue in FastBill when New Client in Harpoon
Use this flowAdd Payment for Revenue in FastBill when New Client in Harpoon
Use this flowCreate Offer in FastBill when New Client in Harpoon
Use this flowSearch Customer in FastBill when New Client in Harpoon
Use this flowSearch Invoice in FastBill when New Client in Harpoon
Use this flowCanceling an Invoice in FastBill when New Client in Harpoon
Use this flowSupported Triggers & Actions
Everything you can automate between Harpoon and FastBill.
When this happensTriggers
A trigger is an event that starts a workflow.
New Client
Triggers when new client created.
New Project
Triggers when there is a new project.
New Expense Category
Trigerrs when there is a new expense category.
New Offer
Triggers when a new offer was created within your FastBill account.
New Customer
Triggers when a new customer is created within your FastBill account.
Customer Updated
Triggers when a customer is updated within your FastBill account.
Do thisActions
Action is the task that follows automatically within your Harpoon integrations.
List All Clients
Get all the clients.
Get a client
View a client’s details.
Create Client
Creates a new client.
Create Expense
Create a new expense.
Create Expense Category
Creates a new Expense Category.
Create Project
Create a new Project.
Learn how to build your first workflow
Follow a simple walkthrough to create, test, and launch your first automation.
- 1
Connect your apps
Link the apps you want to automate.
- 2
Configure your workflow
Set up triggers, actions, and map your data.
- 3
Test & publish
Test your workflow and publish it.
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AI will build it for you
Just describe the task in plain English. viaSocket AI selects the right apps, builds the workflow, maps the fields, and prepares everything for review before you publish.
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About Harpoon
Harpoon is a financial planning and time-tracking tool designed for freelancers and small businesses. It helps users set financial goals, track time, manage projects, and invoice clients efficiently. With Harpoon, users can gain insights into their financial health and make informed decisions to grow their business.
Learn moreSimilar apps
About FastBill
FastBill is a cloud app for German invoicing & accounting. Writing offers and invoices, paying your bills or preparing your tax return is easier than ever with FastBill.
Learn moreSimilar apps
Frequently Asked Questions
Sign up for a free viaSocket account, then authorize both your Harpoon and FastBill accounts. From there, pick a trigger in one app and an action in the other. Your first workflow can be live in under five minutes.
Yes. viaSocket uses instant triggers where available, so data moves between Harpoon and FastBill as soon as the event happens. Scheduled polling triggers run at a maximum interval of 15 minutes.
Yes. You can map specific fields, apply filters to skip records that do not match your conditions, and transform values before they reach FastBill. No coding required.
Yes. You can set up a workflow where Harpoon triggers actions in FastBill, and a separate workflow where FastBill triggers actions in Harpoon. Both run independently and in real time.
viaSocket logs every run so you can see exactly what succeeded and what failed. Failed tasks can be retried from the dashboard without re-configuring the workflow.
Yes, there is a free plan that covers basic workflows between Harpoon and FastBill. Paid plans unlock higher task limits, faster polling, and advanced features like multi-step workflows and conditional logic.
No. The entire Harpoon and FastBill integration is built through a visual, point-and-click interface. Code blocks are available if you want them, but they are never required.
