Updated August 1, 2026. Volume data from Visa & Artemis report (April 2026 snapshot). Foundation membership from Linux Foundation.
x402 revives the HTTP 402 "Payment Required" status code — dormant since 1997 — as a working payment protocol for the agent economy. An agent calls an API, the server responds 402 with a price, the agent pays USDC on-chain, retries with the transaction hash, and the server fulfills the request. No signup. No KYC. No API keys.
Originally incubated by Coinbase and Cloudflare, now governed by the Linux Foundation with 40 member organizations. Official announcement →
The x402 Foundation launched with 17 Premier Members and 23 General Members under Linux Foundation governance.
| Organization | Sector |
|---|---|
| Cloud & Tech | |
| AWS | Cloud & Tech |
| Cloudflare | Cloud & Tech |
| Shopify | E-commerce |
| Visa | Payments |
| Mastercard | Payments |
| American Express | Payments |
| Stripe | Payments |
| Adyen | Payments |
| Fiserv | Payments |
| Coinbase | Crypto |
| Circle | Stablecoins |
| Ripple | Blockchain |
| Solana Foundation | Blockchain |
| Stellar Development Foundation | Blockchain |
| Monad Foundation | Blockchain |
| MoonPay | Crypto Payments |
General Members include: Microsoft, Polygon Labs, NEAR Foundation, Cardano Foundation, Injective, LayerZero Labs, Fireblocks, thirdweb, and more. Source: Linux Foundation press release.
| Platform | Scale | Status |
|---|---|---|
| minia2a.uk [status] | 207 services, 115 agents | Live |
| Agentic.Market | 480K+ agents | Live |
| Satring | Multi-protocol | Live |
| Cinderwright | 1,442 services | Live |
| agent-tools.cloud | 20K+ MCP, 400+ x402 | Live |
| Package | Lang | Notes | Status |
|---|---|---|---|
| @x402/core | TypeScript | Core x402 protocol implementation | Official |
| @x402/fetch | TypeScript | fetch() wrapper with x402 auto-payment | Official |
| x402-rs | Rust | Community Rust implementation | Community |
| x402 (PyPI) | Python | Official Python SDK | Official |
| minia2a-cli | Node.js | CLI for minia2a marketplace | Tool |
| minia2a-skill | Node.js | Claude Code skill for x402 payments | SDK |
| Chain | Share | Notes |
|---|---|---|
| Base | ~90% | Primary chain for agent transactions (USDC) |
| Solana | Growing | Fast, low-cost settlement |
| Polygon | Active | Agentic Services directory |
| XRPL | Active | Ripple integration, $0.0002 fees |
| BNB Chain | Emerging | Binance Wallet integration |
| Stellar | Emerging | Hackathon active |
| Date | Event |
|---|---|
| Jul 30 | Coinbase Q2 2026 Earnings (expected $1.31-1.35B revenue) |
| Jul 14 | Linux Foundation operationalizes x402 Foundation (40 members) |
| Jul 16 | Visa & Artemis report: $15M cumulative adjusted volume, 109.6M transactions |
| Jul 15 | Injective joins x402 Foundation |
| Jul 13 | Binance Agentic Wallet integrates x402 |
Maintained by minia2a.uk — The Stripe for AI Agents. Updated August 1, 2026. Last verified against official sources.