Software customized to your business and QuickBooks Online.

Describe the app you need. Our AI engineers build it around 100% of your workflow, connect it to QuickBooks Online and keep it running. Typically ready to test in 1–2 weeks.

Book a demo

No developers needed. Free test version before you commit.

Invoice approvals

Synced with QuickBooks Online

Waiting for approval

Vendor	Amount	Status
Apex Office Supply	$1,240.00	Manager
Brightline IT	$6,410.50	Finance review
Metro Facilities	$4,980.00	Approved
Summit Freight	$1,275.00	Posted
Northwind Print	$830.25	No PO

Yes, you can get custom software that connects with QuickBooks Online.

Yes. Mercovano builds custom business software that connects directly to QuickBooks Online through Intuit's REST API. Our AI engineers design it around how your team works, and it reads and writes QuickBooks Online data such as vendors, bills, invoices.

QuickBooks OnlineIntuit · Accounting

Reads and writes

VendorsBillsInvoicesCustomersChart of accountsPayments

Your appsApprovals · rules · forms

Apps you can build on QuickBooks Online.

Each one is its own app, built around your rules and connected to QuickBooks Online, so nothing is typed twice.

Customer	Overdue	Status
Harbor Group	$18,400	Promise Fri
Lakeview Partners	$6,200	Reminder 2
Crest Media	$3,950	60+ days
Pine & Co.	$1,120	Paid

How it connects to QuickBooks Online.

Vendor: Intuit
Category: Accounting
Connection: Direct API, no middleman
API type: REST
Access: Open API. We connect with your own QuickBooks Online sign-in; no vendor approval is needed.
Real-time updates: Yes. Changes in QuickBooks Online can trigger your automations straight away.
Writing back to QuickBooks Online: Broad. Your automations can create and update most QuickBooks Online records.
File import fallback: Yes. QuickBooks Online accepts import files, which we use as a fallback.
API documentation: Intuit developer docs ↗

From a description to a working app.

01
Describe the app you need
In your own words: how the work runs today, who approves what, and which systems it touches. Click through a first version and change anything.
02
We build it and connect your systems
Our AI engineers build it on your data. Your admin grants access to your systems, with exact steps from us; we do the rest.
03
Test, launch and improve
Test it free on your own data before you commit; typical apps are ready to test in 1–2 weeks. When your process changes, the app changes with it.

No developers on your side. Just someone who knows how the work gets done.

See how it works in detail →

100% your workflow

Your steps, approvals and policies, not QuickBooks Online's defaults.

Connected to QuickBooks Online

Approved work lands in QuickBooks Online without anyone re-typing it.

One platform, many apps

Every app shares the same QuickBooks Online connection, sign-in and roles. Add the next one when you need it.

QuickBooks Online and Mercovano, answered.

Can I get custom software that connects with QuickBooks Online?

What apps can I build on QuickBooks Online?

Teams build invoice approvals, receipts and card spend, purchase requests, collections, month-end close and vendor onboarding on QuickBooks Online, each with their own approval rules, forms and policies. If you can describe the process, we can build it.

How does the software connect to QuickBooks Online?

Open API. We connect with your own QuickBooks Online sign-in; no vendor approval is needed. The connection uses QuickBooks Online's REST API.

Do I need a developer or IT team?

No. Our AI engineers build, connect, host and maintain your apps. You describe how the work runs today and test it on your own data.

How long does it take?

Typical projects are built and ready to test within 1–2 weeks of going ahead.

How is it priced?

You pay for the software you need, nothing more: no per-user pricing and no implementation fees.