Company directory › Protocol › Payments & settlement

x402

ProtocolSpecification Published specification

Protocol for agents to pay per request over HTTP 402. Created by Coinbase; stewarded by the Linux Foundation's x402 Foundation since Apr 2026, with backers including Google, Visa and Stripe.

Protocol profile

Connects: Agent ↔ API / content (payment)
Maturity: Open protocol · x402 Foundation
Distinction: Pays per request over HTTP 402. Not a checkout protocol like ACP or UCP.
Specification: Primary source ↗

Documented relationships · 2

← x402 Foundation member CloudflareDesign participation

Cloudflare is a member of the x402 Foundation.

Evidence ↗

← Created; contributed to the x402 Foundation CoinbaseDesign participation Standard stewardship

Coinbase contributed x402 to the Linux Foundation's new x402 Foundation (2 Apr 2026).

Evidence ↗

Provided by

CoinbaseCompanySpecification