Christian Karling

Christian Karling

Builder, creator, dreamer

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Maker History

  • OnchainInvoice
    OnchainInvoiceInvoice in fiat, get paid in crypto, no accounting headaches
    Jan 2026
  • 🎉
    Joined Product HuntDecember 31st, 2025

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Crypto invoicing without accounting chaos — looking for early feedback

Hey everyone

I m building OnchainInvoice, a tool that lets businesses invoice in fiat but accept payment in crypto without turning accounting and taxes into a mess.

The core problem I m trying to solve is this:
Most crypto payment tools are great at receiving funds, but terrible at producing accountant-ready records. People end up manually checking wallets, hunting historical exchange rates, and stitching together spreadsheets after the fact.

What OnchainInvoice does:

OnchainInvoice - Invoice in fiat, get paid in crypto, no accounting headaches

OnchainInvoice lets you invoice in fiat, get paid in crypto, and automatically capture the exact fiat value at the moment payment is received. It generates accountant-ready, cryptographically signed, tamper-evident receipts for every invoice, eliminating manual exchange-rate lookups, spreadsheets, and retroactive reconciliation. Designed for individuals and small teams who accept crypto payments but still need clean, defensible fiat accounting. https://www.onchaininvoice.com
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