Software customized to your business and Square.

Describe the app you need. Our AI engineers build it around 100% of your workflow, connect it to Square 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 Square

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 Square.

Yes. Mercovano builds custom business software that connects directly to Square through Block's REST, SDK API. Our AI engineers design it around how your team works, and it reads and writes Square data such as bills, payments, cards.

SquareBlock · AP, spend & finance tools

Reads and writes

BillsPaymentsCardsExpensesVendorsApprovals

Your appsApprovals · rules · forms

Apps you can build on Square.

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

How it connects to Square.

Vendor: Block
Category: AP, spend & finance tools
Connection: Direct API, no middleman
API type: REST, SDK
Access: Open API. We connect with your own Square sign-in; no vendor approval is needed.
Real-time updates: Yes. Changes in Square can trigger your automations straight away.
Writing back to Square: Broad. Your automations can create and update most Square records.
File import fallback: Yes. Square accepts import files, which we use as a fallback.
API documentation: Block 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 Square's defaults.

Connected to Square

Approved work lands in Square without anyone re-typing it.

One platform, many apps

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

Square and Mercovano, answered.

Can I get custom software that connects with Square?

What apps can I build on Square?

Teams build invoice approvals, receipts and card spend, purchase requests, vendor onboarding, month-end close and collections on Square, 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 Square?

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