Hubble Network (https://hubble.com) is building something similar - an open, global BLE network.

Both let you transmit arbitrary data, but the custom setup here is a lot of overhead. Hubble gives you an SDK and lets you get back to building your device.

Anchor Browser has documentation here showing how to combine x402 with an agentic browser session.

https://anchorbrowser.io/blog/pay-to-win-coinbase-x402-ancho...

We are not far off from humans giving a monthly allowance to their agentic counterparts.