An open SDK for agentic payments. Let AI agents make payments, hold funds, and move money across chains with policy enforcement and human approval built in.

An open-source, serverless and agentic design for pay-per-use AI content generation using USDC stablecoin payments via x402, featuring browser wallet and autonomous agent flows on AWS.

Golang Interface for Machine Payments Protocol by cp0x

MCP server for 402 Index: discover 15,000+ paid API endpoints across L402, x402, and MPP

A curated list of protocols, specs, SDKs, and tools powering the emerging agentic commerce stack.

Payment gateway for MCP servers — monetize your tools with one wrapper. Supports x402, MPP, and Stripe.

Next.js • Hono • Express • Fastify • Elysia • NestJS • Cloudflare Workers • Vercel Edge • AWS Lambda • Deno + Session examples for pay-as-you-go billing

A unified SDK around the https://www.x402.org/ ecosystem, Integrate X402 with ease, easier adoption. (By contributor of Hono)

Stable402.com — reference site for the x402 agentic payment ecosystem. Built with Astro 6 + Starlight on Cloudflare Pages.

Autonomous AI-to-AI Nano payment toolset with MCP and HTTP APIs for machine-native transactions. Supports wallet balance checks, direct transfers, and payment request/status flows with deterministic responses, making integration fast, reliable, and framework-agnostic for autonomous agents.

x402 payment middleware for Cloudflare Workers — POC 1 of the Stable402 reference implementation series

Agentic Payments Protocol Demo - Interactive comparison of ACP, AP2, x402, and MCP payment protocols for AI agents

The payment protocol for people and agents. One MCP server, any payment rail.

Trust and quality infrastructure for AI agents. 225+ quality-scored capabilities, SQS scoring, EU AI Act support.

Stable402 org profile

💳 Simplify payments with this Next.js proxy for seamless x402 gateway integration, enabling access to APIs via USDC settlements on Solana.