How do I connect Invoice Ninja?

Add the Invoice Ninja piece to a flow, then authenticate with Custom auth. Once connected, its 0 triggers and 10 actions are available anywhere in the builder.

What can I automate with Invoice Ninja?

Connect Invoice Ninja to any of 770+ other apps and AI steps, then automate the work in between without writing code.

Can I self-host the Invoice Ninja integration?

Yes. Activepieces is fully self-hostable, so you can run the Invoice Ninja piece on your own infrastructure with your connections and your data staying in your environment.

Can my AI agent use Invoice Ninja as a tool?

Yes. Every piece you connect can be exposed over one Activepieces MCP server, so Claude, Cursor, Windsurf or any MCP client can call Invoice Ninja actions as tools.

Invoice Ninja integration

Free open-source invoicing tool

Start building Use Invoice Ninja with your AI

Actions: 10
Triggers: 0
Auth: Custom auth
License: MIT, open source
Updated: November 2026

About the Invoice Ninja integration

Add the Invoice Ninja piece to a flow, connect your account once, and the rest of the builder can read from it and write to it. Because the piece is open source you can run it on our cloud or self-host it, and combine Invoice Ninja with 770+ other apps in the same flow.

Actions

Everything Activepieces can do in Invoice Ninja

Drop any of these into a flow and fill in the fields. No code is required.

Create Task
Creates a billable task in Invoice Ninja.
5 fields
Check Task Existence
Returns 1 if a task with this number exists, 0 if not.
1 field
Get Client Details from e-mail
Gets the client whose contact has this e-mail. Returns false when there is none.
1 field
Get Invoices
Gets invoices by payment status, optionally for one client. Returns false when none match.
3 fields
Get Report
Runs an Invoice Ninja report and returns its columns and rows.
6 fields
Create Invoice
Creates an invoice from existing products (price and tax are taken from each product).
10 fields
Create Client
Creates a new client with a primary contact in Invoice Ninja.
13 fields
Create Recurring Invoice
Creates a recurring invoice from existing products on a billing schedule.
12 fields
Perform Action on Recurring Invoice
Start, stop, send now, restore, archive or delete a recurring invoice.
2 fields
Custom API Call
Make a custom API call to a specific endpoint
10 fields

Use Invoice Ninja in a flow

Connect Invoice Ninja once and every trigger and action above is yours to drop into the builder, alongside 770+ other apps. Free to start, on our cloud or your own servers.

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Invoice Ninja, answered.

Yes. Activepieces is open source and free to start, and the Invoice Ninja piece is included on every plan, from the free cloud tier to any self-hosted deployment.