x402 (open standard)
x402.org
Open payment standard built on HTTP 402 for internet-native and agentic payments; hosted as a Linux Foundation project with docs at docs.x402.org.
USDCother EIP-3009 / SPL tokensBaseSolanaother EVM networks
Cloudflare Agents x402
developers.cloudflare.com
Cloudflare Agents SDK docs for accepting and making machine-to-machine x402 payments on Cloudflare Workers.
Crypto payment details
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- x402
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Docs fetched. Last checked 2026-10-21.
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More in Protocols & SDKs
Vercel x402-mcp
vercel.com
Vercel's x402-mcp package integrating x402 payments with Model Context Protocol servers and the Vercel AI SDK, so MCP tools can charge per call.
USDCBase
A2A x402 Extension
github.com
Open-source extension that brings x402 crypto payments to the Agent-to-Agent (A2A) protocol so agents can monetize services with on-chain payments.
USDCEVM networks