Software customized to your business and TaxJar.

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

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 TaxJar.

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

TaxJarStripe · AP, spend & finance tools

Reads and writes

BillsPaymentsCardsExpensesVendorsApprovals

Your appsApprovals · rules · forms

Apps you can build on TaxJar.

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

How it connects to TaxJar.

Vendor: Stripe
Category: AP, spend & finance tools
Connection: Direct API, no middleman
API type: REST
Access: Your TaxJar admin turns on API access, and we give them the exact steps.
Real-time updates: No. Your automations check TaxJar for changes on a schedule.
Writing back to TaxJar: Partial. Key records can be written back; the rest are read.
File import fallback: Yes. TaxJar accepts import files, which we use as a fallback.
API documentation: Stripe 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 TaxJar's defaults.

Connected to TaxJar

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

One platform, many apps

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

TaxJar and Mercovano, answered.

Can I get custom software that connects with TaxJar?

What apps can I build on TaxJar?

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

Your TaxJar admin turns on API access, and we give them the exact steps. The connection uses TaxJar'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.