Pago402
Stablecoin · Card · Agent
Payments · Invoicing · EU VAT

Take the money however they want to pay. Send the paperwork either way.

Your customer wants to pay in stablecoins. Your accountant wants a numbered invoice with the right VAT on it. Today that is two systems and a spreadsheet holding them together.

Pago402 is one: send a payment link, let them settle by card or in USDC, and the compliant document comes out the other end without anyone re-typing it.

3Ways to pay one invoice
4Stablecoins accepted
28EU VAT jurisdictions
0Private keys you hold
Invoice 2026-0184 14 Feb
Platform licence · Q12,500.00
VAT · reverse charge0.00
Total dueEUR 2,500.00
Rate · EUR/USD1.1600
Received2,900.00 USDC
Settled onBase · 12 sec

Reverse charge — VAT to be accounted for by the recipient (Art. 196 Directive 2006/112/EC)

Paid
Section 01
Who it's for

Four businesses with the same problem from different directions

The money is easy to receive. Proving what you received, to whom, in which country, and at what tax treatment is the part that costs a person a week a month.

Software & digital services

You sell across borders

Customers in a dozen countries, some businesses, some not. Every one of them changes what you're supposed to charge — and you find out at quarter-end.

Marketplaces & platforms

You collect on behalf of others

You take a cut and pass the rest on. That makes you responsible for money that was never yours, and for telling everyone what happened to it.

Exporters & agencies

You get paid from abroad

Wires take days, cost a percentage and arrive short. Your client offered to pay in stablecoins, and your accountant said absolutely not.

API & data businesses

Your customer isn't a person

Software is buying from you now. It can't complete a signup form, hold a card, or wait for a human to approve a €0.03 charge.

Section 02
Scenarios

What this looks like on an ordinary Tuesday

“A customer in Dublin wants to pay by card, one in Lisbon wants to pay in USDC, and one in Zurich hasn't decided. I need all three to end up in the same books.”

Finance lead · B2B software, 40 people

You send one link. The payer opens it and sees the methods that actually work for them — card, or a stablecoin on the chain they use. They pick; you don't have to guess in advance, and you don't maintain three checkout flows.

  • Same day

    The payment lands and the invoice closes itself. Partial payment leaves the balance visible instead of failing the whole thing — the customer tops it up to the same address.

  • Automatically

    VAT is decided from the facts, not from a default. Irish customer, Portuguese business with a valid VAT number, Swiss company: three different treatments, worked out per invoice.

  • Month end

    Documents come out numbered and in sequence, as PDFs, grouped on your cadence and in your timezone. Nobody exports a CSV and fixes it by hand.

“Sellers on our marketplace want paying quickly. We take 8%. I don't want to write custody code, and I really don't want to be holding their money on a spreadsheet.”

CTO · vertical marketplace

Each seller is a separate account with its own keys, its own branding on the payment page, and its own onboarding — hosted, so you never see a document you'd have to store. Your fee is separated the moment funds arrive, not reconstructed later from a report.

  • On arrival

    The split happens once, at the source. Your commission and the seller's proceeds go to different places immediately, so no balance is ever ambiguous.

  • Continuously

    Your systems hear about it directly. Signed notifications, retried until they land, so your own dashboard never disagrees with ours.

  • On demand

    Sellers get their own documents, issued in their name with their numbering, not a line item on yours.

“My client in Singapore pays a €14,000 invoice by wire. It arrives four days later, €80 short, and the reference field is empty. Every single time.”

Founder · design agency

Price the work in euros; let them settle in a stablecoin. The amount is fixed at the rate when the payment opens, so nobody is arguing about a market move afterwards, and the conversion happens on your side — you don't have to hold anything you didn't want to hold.

  • Minutes

    Money arrives while the client is still in the thread, not on Thursday.

  • To the cent

    The expected amount is exact, and what arrives is checked against it before anything is marked paid.

  • Same hour

    The invoice is issued with reverse charge stated on it, so the accountant gets a document they recognise rather than a screenshot of a wallet.

“Half our API traffic is now agents acting for someone else. They can't sign up, and metering them after the fact means chasing invoices for eleven euros.”

Head of platform · market data API

Charge at the door instead. A request without payment gets back a machine-readable price. The agent pays it and repeats the request, and the whole exchange finishes inside the same call — no account, no card on file, no invoice to chase. It works down to fractions of a cent, which is where per-call pricing usually falls apart.

  • Per request

    Pricing is quoted, not assumed. An agent can ask what something costs without committing to buy it.

  • No onboarding

    The buyer needs no relationship with you, which is the only way a one-off machine purchase is worth transacting at all.

  • Still your books

    Those payments arrive in the same ledger as the card and stablecoin ones, and appear on the same documents.

Section 03
What you get

One system where you currently have three and a spreadsheet

Getting paid

One link, every method

Card via Stripe, stablecoins on Polygon, BSC or Base, or a direct machine payment. The payer sees what's available to them and nothing that isn't.

Pricing

Charge in your currency

Invoice in euros or dollars and let people settle in USDC, USDT, esEUR or esUSD. The conversion is yours to keep, not theirs to argue about.

Tax

VAT worked out per invoice

Place of supply, domestic rates, intra-EU reverse charge with the legal wording on the document, exports out of scope. Customer VAT numbers checked against the EU register.

Documents

Invoices your accountant accepts

Numbered without gaps, issued on your billing cadence, rendered to PDF and kept. Corrections are credit notes, the way an auditor expects.

Custody

Funds held without you holding keys

Balances sit in accounts the platform controls through a hardware-backed key service. Nobody on your team has a seed phrase to lose.

Payouts

Money moves on to where it belongs

Proceeds settle to your destination, fees separate at source, overpayments are tracked and returned rather than quietly absorbed.

Visibility

A dashboard, and an API behind it

Everything the interface shows is available programmatically, so your own tools can read the same truth.

Notifications

Your systems find out immediately

Signed, retried notifications when an invoice is paid, plus emails to payers with the link and the receipt.

Section 04
How it works

Four steps, and you only do the first one

  1. You raise an invoice

    From the dashboard or from your own software, priced in the currency you sell in. You get a link to send.

  2. They pay it, their way

    Card, stablecoin, or machine payment. The exact amount and a deadline are shown up front, so there is nothing to interpret.

  3. We confirm it before saying it's paid

    Money is only credited once it's been verified independently of whoever reported it. Nothing is marked paid on a promise.

  4. The paperwork follows on its own

    Your fee split, the payout, the notification to your systems, and the tax document — in that order, without anybody starting it.

Underpayment isn't a failure. If someone sends less than the amount due, the invoice shows what's outstanding and accepts the rest at the same address. Overpayment isn't silently kept either — it's recorded separately and paid back out.
Section 05
Trust

The questions your CFO will ask before your CTO does

“How do you know it arrived?”

Two independent checks, always

The notification that money moved has to be provably from the provider, and the transfer has to be confirmed against the network itself. Either one alone can be wrong or forged, so neither is trusted alone.

“What if it's counted twice?”

Balances are recalculated, not incremented

What an invoice has received is always recomputed from the underlying payments. A message delivered four times produces the same answer four times.

“Who checks the checkers?”

An audit that runs on its own

A regular sweep compares what we recorded against what actually happened and reports any disagreement to a human. It never silently corrects a balance — an automatic fix would hide the very problem it found.

“Can someone alter an invoice?”

Issued documents can't be changed

Once a fiscal document is issued the database itself refuses to modify or delete it. The only correction is a credit note, which is what the law expects anyway.

“Where are the keys?”

Nowhere anyone can copy them

Signing keys live in a managed key service and are never present in the application. There is no export, and no file to steal.

“What if the tax answer is unclear?”

It stops rather than guesses

When the facts don't determine the treatment, issuance halts and asks. A draft you fix in an afternoon is a much smaller problem than an issued document that misstates a liability.

Section 06
Demo

Bring an invoice you actually sent last week

Thirty minutes, your own numbers. We raise it in the system, pay it in a stablecoin while you watch, and show you the document that comes out — including which VAT treatment it picked and why.

Book a demo

No account, no integration work, nothing to install beforehand.

Colophon

Named after the status code that says payment required

HTTP has had a code reserved for “you owe me money” since 1997, and almost nothing ever used it. It turns out to be the right name for a platform built on the assumption that a payer might be a person with a card, a company with a treasury, or a piece of software that needs to settle a bill and get on with its work — and that all three should end up on the same invoice.