Use QuoteBill inside your software

Connect QuoteBill to your accounting app, ERP or tool: an API, embeds, source-available connectors and an AI-assistant link. Free, with the limits stated.

Who this is for

QuoteBill makes quotations, invoices and other business documents, and it is free. This page is for people who build or run software that sits near a quotation or an invoice and want to use QuoteBill inside it. You do not need a partnership or a contract to start.

Accountants and bookkeepers who want clients’ documents to start from a clean template, or who automate with a spreadsheet or a script.
Bookkeeping and accounting apps that want to offer a document, a calculator or a template inside their own screens.
ERP and self-hosted tools (Odoo, ERPNext and Invoice Ninja are examples) that can call a web address or run a script.
Tools for freelancers and small shops that already hold the customer and the lines of an order.
Agencies and developers who set this up for a client.

QuoteBill is not affiliated with, endorsed by or listed in any product named on this page, and has no partner status with any of them. A name is used only as a plain fact about what that product can do.

Four ways in

Each way works on its own. Pick the one that matches what you can change in your product.

API
You can send a web request from a server, a script or an automation tool
What it gives you
Create and read your own documents from a server or script, with a personal key. POST /v1/calculate works out the totals of a document, and the OpenAPI file is published at /openapi.json.
What you need
A free QuoteBill account, an API key made in Settings, and a server or automation tool that can send an HTTPS request with a header. The guide is in English.
Status Live.
Embeds
You can paste a snippet into a page
What it gives you
A frame or snippet you paste into a page: a template with its Excel and Word downloads, the VAT and GST calculator, the currency converter, document totals and a template finder, all listed on an overview page.
What you need
A web page where you can add an iframe or a snippet. No key and no account.
Status Live.
Connectors
You use n8n, Google Sheets, WordPress, Zapier or Make
What it gives you
Source-available code and written recipes for tools people already use: a JavaScript SDK, an n8n node, a Google Sheets script, Zapier and Make recipes, a WordPress plugin, and recipes for Odoo, ERPNext, Akaunting and Invoice Ninja. The recipes are written, not tested against real installs.
What you need
The tool itself, an API key, and willingness to download and install code yourself.
Status Live as downloads. Not listed in any marketplace. Not yet run inside n8n, Google Sheets or WordPress.
AI assistants (MCP)
Your users already ask ChatGPT or Claude
What it gives you
People ask an AI app in plain words to draft a document, read a sample contract, work out tax or convert a currency.
What you need
A free QuoteBill account and an AI app that accepts connectors, such as Claude or ChatGPT on the web. Sign in and choose Allow.
Status Live.

Start in about ten minutes

Three steps for each way.

API

Sign in, confirm your e-mail address, open Company settings and make an API key (valid 30, 90 or 365 days). Copy it at once: it is shown once.
Check it from a server or script with GET /v1/ping and the header Authorization: Bearer followed by your key. Never put the key in a web page.
Create a draft with POST /v1/documents and open the editor_url it returns to check and send the document. The guide lists every field and limit.

API guide (in English) · OpenAPI file

Embeds

Open the public page of what you want to show: a template page, the VAT and GST calculator or the currency converter.
Copy the snippet the page offers and paste it into your page, where your page allows an iframe.
Check it at a phone width. The frame carries a credit link back to QuoteBill that no setting removes.

Templates · VAT and GST calculator · Currency converter · Embeds overview

Connectors

Download the package for your tool from the links under these steps. It is source-available code and is not published in any directory.
Unzip it and install it yourself in your n8n, Google Sheets, WordPress, Zapier or Make, or add the SDK to your project, and give it an API key made in Settings. For Odoo, ERPNext, Akaunting or Invoice Ninja, follow the written recipe.
Make a test document, open its editor_url, and only then use the connector in a real workflow.

JavaScript SDK (zip) · n8n node (zip) · Google Sheets script (zip) · WordPress plugin (zip) · Zapier, Make and accounting-software recipes (zip)

AI assistants (MCP)

Open the guide for your AI app and copy the connector address, https://quotebill.com/mcp.
In the AI app add a custom connector with that address and choose Connect.
Sign in to QuoteBill, choose Allow, and ask in plain words, for example to draft a quotation or work out VAT.

Use QuoteBill in ChatGPT, Claude and Gemini

Honest limits

Read this before you build

Free. QuoteBill, the API, the embeds, the connectors and the AI connection cost nothing today, and there is no partner fee.
Limits for each key: 60 requests a minute and 5,000 a day. An account can make at most 500 documents a day through the API and hold five active keys. A request over a limit gets a 429 answer.
The API guide is in English only. This page is in English, Korean, Japanese and German.
No service-level agreement: no uptime promise and no guaranteed response time.
E-Contracts make a simple electronic signature with an audit trail. QuoteBill is not a certified e-signature service, and the signature is not a qualified or advanced electronic signature.
The connectors are source-available code that you download, install and run yourself. None is listed in any marketplace or directory, and QuoteBill does not run them for you.
Status of the connectors: the n8n node, the Google Sheets script and the WordPress plugin have not yet been run inside n8n, Google Sheets or WordPress. They are unit-tested against QuoteBill’s API code only, and no PHP or n8n check was possible. The recipes for Odoo, ERPNext, Akaunting and Invoice Ninja are written recipes, not tested against real installs. Try each one on a test document first.
The API creates drafts and reads your own documents. It cannot send, sign, edit or delete anything, and it can be called from a server, not from a visitor’s browser.
Embeds carry a credit link back to QuoteBill that no setting removes.

Security

We will help you integrate

If you are building something and want to use QuoteBill in it, send us a message: what your software does, who uses it and which way you would like to connect. We will tell you what is possible today and what is not.

Contact QuoteBill

Questions

Do I need to sign a partnership agreement?

No. The API, the embeds and the AI connection work with a free QuoteBill account (the embeds need none), under QuoteBill’s terms of use and the limits above.

Can my software call QuoteBill without a plugin?

Yes, if it can send an HTTPS request with a header. The API is plain JSON over HTTPS; many tools call this an HTTP request, a webhook action or a custom API call. Keep the key on your server.

Can I show a QuoteBill document inside my app?

Today in two ways: the template and calculator embeds, or the editor_url the API returns, which opens the draft in QuoteBill’s editor. There are also document-totals and template-finder embeds.

Can my users sign contracts through my software?

Not through the API: it does not create or send contracts. E-Contracts work inside QuoteBill, where a member makes the contract, sends the signing link and the other side signs without an account. QuoteBill is not a certified e-signature service.

Is there a QuoteBill app in the Xero, QuickBooks, Odoo or another marketplace?

No. QuoteBill is not listed in any marketplace today, and no vendor has certified or endorsed it. The connectors on this page are source-available code, not marketplace apps.

What happens if I reach a limit?

A request over 60 a minute or 5,000 a day gets a 429 answer with the seconds to wait, and documents past 500 a day are refused until the next UTC day. If you need more, tell us what you are building through the contact page; we cannot promise a change.

Odoo, ERPNext, Akaunting, Invoice Ninja, n8n, Google Sheets, Zapier, Make, WordPress, Xero, QuickBooks, Claude and ChatGPT are products and trademarks of their owners. QuoteBill is not affiliated with, endorsed by or listed in any of them, and has no partner status with them. Steps in those products may change.