Bitcoin Lightning invoicing

Get on the zaptrain.
Get paid in seconds.

Send a branded invoice. Your customer scans it. The sats land in your Lexe wallet within seconds.

Create a free accountSee how it works
  • Free to start
  • 1% only when you get paid
  • We never hold your money
  • Confirmed in seconds, not an hour

Northwind Studio

Invoice for Dana Lee
Amount due
42,000 sats
Website redesign — final
Due 15 Sep 2026
Items
Design revisions2 × 18,000
Hosting setup1 × 6,000
Total42,000 sats
Scan with any Lightning wallet
Payment received· 0.9 s
How it works

Two moves. No bank in the middle.

Connect your wallet once (setup takes about five minutes). After that, every invoice is the same two moves.

  1. Create the invoice

    Line items, taxes, due date, your logo and color. Email it from Zaptrain, or copy the link and send it yourself over WhatsApp, SMS or your own email.

  2. Get paid, straight to your wallet

    Your customer scans the QR with any Lightning wallet. The invoice flips to Paid and the sats land in your Lexe wallet. There is no payout schedule and nobody in between.

Why Zaptrain

Built on rails that don't sleep.

Card networks were built for a 9-to-5 world: clearing windows, chargebacks, frozen accounts, cross-border friction. Lightning plus self-custody removes all four.

Instant, 24/7 settlement

Lightning payments confirm in seconds, any day of the year. There is no clearing window and no payout schedule: your invoice goes from Sent to Paid while your customer is still on the page.

Final. No chargebacks, no freezes

Bitcoin payments can't be reversed. No 90-day chargeback window, no processor pulling funds back, no merchant account suddenly “under review”.

Only you can move the funds

Funds settle straight into a Lexe self-custody wallet only you control. Zaptrain never has access. Bill anyone, anywhere, on the same wallet and the same rails, wherever your customer is.

Already take Bitcoin?

On-chain checkouts cost you customers. Lightning ones don't.

What your customer goes through today
  • Copies and pastes an address, types the exact amount by hand
  • Spends 10–60 stressful minutes refreshing, waiting for confirmations
  • Under-payments and late confirmations left for you to reconcile
What they get with Zaptrain
  • Scans a QR and approves with one tap, with the exact amount already in the code
  • Payment completes and confirms in seconds, on the same screen
  • Under-payments and undetected payments are not possible
For you: your invoice flips to Paid, your system gets a webhook, and the sats land in your own Lexe wallet, never a balance we hold. More checkouts completed, nothing to reconcile by hand. Add Lightning next to your on-chain option, or replace it. The hosted checkout drops into any site, and the API and MCP connector fit any system of record.
Features

Everything you need to bill in sats.

A complete invoicing toolkit for freelancers, merchants and small teams running on Bitcoin.

Invoices with line items

Quantities, taxes, due and expiry dates, memos. Edit, reissue or cancel from one dashboard.

Your brand on every invoice

Business name, logo and color on the email and the payment page.

Email, links and reminders

Send from Zaptrain or copy the link. See when it's opened, resend, and nudge late payers in one click.

Live payment status

Unsent, Sent, Opened, Paid, Overdue. Updated the moment a payment lands.

Webhooks and hosted checkout

A signed invoice.paid event lands on your server the moment you're paid, and a Pay with Lightning button drops into any site.

Built for your own systems

Create and manage invoices from your own software over the REST API, or let an AI assistant do it for you over MCP.

Simple, transparent pricing
Pay only when you get paid. No setup fee and no subscription.
1%
Per paid invoice · flat
No minimum. Lexe's receive fee comes out of that 1%, not on top of it.
No monthly fees
No invoice limits
No setup costs
No payout delays
Create a free account
Getting started

One-time setup, about five minutes.

Everything you need is a free Lexe wallet and a Zaptrain account. No bank, no processor, no approval wait.

  1. On your phoneDownload Lexe

    Get the Lexe app for iPhone or Android and sign up.

    Lexe is a self-custody Bitcoin Lightning wallet. Your keys sit in secure hardware that Lexe cannot access, only you can move the funds, and it receives payments even while your phone is offline.

  2. In LexeCreate a Receiver credential

    Open Lexe → Menu → Client credentials → Create. Set the role to Receiver, then copy the credential.

    A Receiver credential lets Zaptrain create Lightning payment requests and see when they are paid. Nothing else. Money can come in; none can leave your wallet through Zaptrain. Zaptrain checks the credential with Lexe when you connect, and refuses anything that can spend.

  3. On zaptrain.comCreate your Zaptrain account

    Sign up with a business or personal name and an email, then paste the Lexe credential in Settings.

    No ID, no KYC, no bank details, because Zaptrain never holds your money. It tests the connection on save and confirms the credential is a Receiver.

  4. SettingsAdd your branding

    Add your business name, logo, brand color and a default memo.

    They appear on every invoice email and payment page your customers see.

Create a free account