Invoice Ninja
Free open-source invoicing tool
Connect it
In Keystile Automations → Connections → New connection, choose Invoice Ninja and sign in. Your AI tools and workflows then use it through Keystile; they never see the password or key.How connecting works.
Try it from your AI tool
Using Keystile, in Invoice Ninja: check task existence (Verify if a Task Already Exists).What it can do (10 actions)
| Action | What it does | Changes data |
|---|---|---|
| Check Task Existence | Verify if a Task Already Exists | |
| Create Client | Creates a new client in InvoiceNinja. | Yes |
| Create Invoice | Creates an invoice in Invoice Ninja for billing purposes. | Yes |
| Create Recurring Invoice | Creates a recurring invoice in Invoice Ninja for billing purposes. | Yes |
| Create Task | Creates a task instance in Invoice Ninja for billing purposes. | Yes |
| Custom API Call | Make a custom API call to a specific endpoint | Yes |
| Get Client Details from e-mail | Gets the client details if they exist by e-mail. | |
| Get Invoices | Gets data for invoices. | |
| Get Report | Gets report data from InvoiceNinja. | |
| Perform Action on Recurring Invoice | Actions include: start, stop, send_now, restore, archive, delete. |
How Keystile protects it
Every Invoice Ninja action is checked before it runs, whether it comes from an AI tool or a workflow. 5 of its actions change data; your rules, limits and budgets decide whether each is allowed, held for a person or stopped, and it all goes into the signed record.
Use Invoice Ninja with your AI assistant — safelyClaude, Cursor or ChatGPT do the work; Keystile checks every action first.
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