Micro-transactions and the first AI-native fax service

I've been interested in micro-transactions for about as long as I can remember. I've wanted to sell something for a tiny amount of money ever since I learned about PayPal's micro-transaction support via NearlyFreeSpeech, the hosting provider. I've finally done it, by combining some of the oldest and newest tech I can think of: faxes and AI.

Specifically, my unofax.com project now supports x402, the fledgling micro-transaction-friendly payment standard. The page on Unofax has comprehensive API documentation. Do humans read docs any more? Did they ever? I've written the documentation primarily to be consumed by AI agents that have been tasked with sending a fax, but maybe some humans will find it useful too - or at least appreciate the cute animations.

x402 is built on cryptocurrency. With the rise of AI agents, I finally see a compelling use case for crypto. Not many people are comfortable handing their credit card details to their agent. But creating a wallet and giving the agent a few dollars to spend? I'd do that.

It's hard to imagine that AI agents will want to send a lot of faxes, but I found it equally hard to imagine I'd have a lot of human users either, and I've already had dozens of customers since launching the service. I've learned from that experience that the Internet is a big place and I should just build things. So if there are ever any AI agents that want to send a fax, they'll choose the only AI-native fax service on the Internet.

AI-native

What makes a service AI-native? In my opinion it means it's pay-per-use (e.g. a fax costs USDC$0.20 per page), it doesn't require an account, and an AI agent can figure out how to invoke it by itself (e.g. using publicly-accessible docs to construct a curl command).