# Invoice Ninja integrations: clients and invoices

> Create a client, create an invoice and create a quote in Invoice Ninja. Connect Invoice Ninja to the rest of your finance stack with Tray.ai.

**Canonical page:** https://tray.ai/connectors/invoiceninja-integrations/
**Categories:** Finance
**Connects through:** HTTP Connector

## Overview

Invoice Ninja is invoicing and billing software for freelancers and small businesses, covering clients, quotes, invoices, recurring billing, payments, expenses, and time tracking. Tray.ai connects to Invoice Ninja through the HTTP Connector, so your workflows can call the Invoice Ninja API alongside the rest of your stack.

## Use cases

### Clients

Read, create, update, and delete clients in Invoice Ninja from any Tray.ai workflow. The Invoice Ninja API covers calls such as list clients and create a client.

- List clients
- Create a client
- Edit a client

### Invoices

Read, create, update, and delete invoices in Invoice Ninja from any Tray.ai workflow. The Invoice Ninja API covers calls such as list invoices and create an invoice.

- List invoices
- Create an invoice
- Edit an invoice

### Quotes

Read, create, update, and delete quotes in Invoice Ninja from any Tray.ai workflow. The Invoice Ninja API covers calls such as create a quote and edit a quote.

- Create a quote
- Edit a quote
- Delete a quote

### Payments

Create, update, and delete payments in Invoice Ninja from any Tray.ai workflow. The Invoice Ninja API covers calls such as create a payment and edit a payment.

- Create a payment
- Edit a payment
- Delete a payment

### Recurring invoices

Create, update, and delete recurring invoices in Invoice Ninja from any Tray.ai workflow. The Invoice Ninja API covers calls such as create a recurring invoice and edit a recurring invoice.

- Create a recurring invoice
- Edit a recurring invoice
- Delete a recurring invoice

### Expenses

Read, create, and delete expenses in Invoice Ninja from any Tray.ai workflow. The Invoice Ninja API covers calls such as list expenses and add an expense.

- List expenses
- Add an expense
- Delete an expense

## Challenges Tray.ai solves

### Keeping Invoice Ninja credentials out of logs

A raw API call usually means pasting a key or token into the request, where it ends up in step inputs, logs, and screenshots.

**How Tray.ai helps:** Store Invoice Ninja credentials once as a Tray.ai authentication and reference them from the HTTP Connector. Tray.ai masks authentication values in logs, so the secret never shows up in a step's input or output.

### Going from the Invoice Ninja API docs to a working call

Translating an example request from API docs into a workflow step means copying the method, URL, headers, and body by hand.

**How Tray.ai helps:** Paste a cURL example from the Invoice Ninja API docs into the HTTP Connector and Tray.ai fills in the method, URL, headers, and body for you.

### Handling files and non-JSON responses

Not every API answers in JSON. Some return XML, files, or binary data, or expect a multipart upload.

**How Tray.ai helps:** The HTTP Connector parses JSON and XML responses, returns files you can pass to the next step, and sends multipart form data for uploads.

## Frequently asked questions

### Does Tray.ai connect to Invoice Ninja?

Yes. Tray.ai connects to Invoice Ninja through the HTTP Connector, which calls the Invoice Ninja API directly. Any call the Invoice Ninja API documents can run as a step in a Tray.ai workflow.

### How does Tray.ai authenticate with Invoice Ninja?

The Invoice Ninja API uses an API key in a request header. You save it once as a Tray.ai authentication, and the HTTP Connector adds it to every request.

### Can I get a dedicated Invoice Ninja connector?

Invoice Ninja runs through the HTTP Connector rather than a dedicated connector. If your team wants one, the Tray.ai connector SDK can build a dedicated Invoice Ninja connector from the Invoice Ninja API.

## Learn more

- Intelligent Integration: https://tray.ai/platform/intelligent-ipaas/
- Merlin Agent Builder: https://tray.ai/platform/merlin-agent-builder/
- Agent Gateway for MCP: https://tray.ai/platform/agent-gateway/
- Book a demo: https://tray.ai/contact/