Today, the popular project $PAYAI of X402 is very likely to go live on alpha!

X402 is the "protocol revolution" that truly connects Web3 with AI for payments.

In the traditional internet, when you visit a webpage or call an API, the HTTP protocol is only responsible for "communication," while payments rely on third-party services.

But the X402 protocol launched by Coinbase is quietly changing all of this.

X402 writes payments directly into the underlying language of the internet — HTTP.

It reactivates the long-forgotten status code 402 Payment Required, allowing "resource access" and "payment completion" to be achieved in a single network request.

The client sends a request, the server responds "payment required," and the user or AI agent immediately pays with on-chain stablecoins, and once the transaction is confirmed, the resource is immediately opened.

No need to register an account, no need for a credit card, just a wallet.

What does this mean?

It means that AI agents can finally pay for themselves.

They can autonomously call models, purchase data, and access services, truly forming an "economic system between machines."

And this is a key link in the combination of Web3 and AI.

In this transformation, one project is quickly gaining popularity — PayAI.

It is currently the earliest and most active X402 facilitator, initially starting on the Solana chain and now expanded to a multi-chain environment.

PayAI's goal is to enable any developer or service to "integrate X402 payments with one click."

Developers only need to call PayAI's middleware to achieve: HTTP request → automatically return 402 payment instruction → verify on-chain payment → automatically grant access.

For Web3 creators, PayAI opens a new world of pay-per-use and micropayments;

For AI developers, it truly provides an automated economic loop for "model as a service" and "data as a service."

X402 is the language that allows machines to understand "money,"

and PayAI is teaching them how to truly get things done with money.

The future of Web3 may just begin with an HTTP 402.