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.

The neutral micropayment router for autonomous agents. A single HTTP client that intercepts '402 Payment Required', routes across x402, L402, and MPP, persists credentials as recoverable assets, enforces per-envelope budgets, and emits a structured trace.

A wallet for agents. Make payments via x402, use stablecoins, swap assets, earn yield with defi and buy tokenized stocks across the most popular chains.

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

Golang Interface for Machine Payments Protocol by cp0x

Security middleware for x402 agentic payments — PII redaction, spending policy, and replay detection before blockchain commit

A wallet for your agents to onboard and pay. Agentic MPP / x402 payments from your machine - CLI + MCP server.

Canonical Swift SDK for the Machine Payments Protocol (MPP) — pay for and charge for machine-to-machine API calls over HTTP 402.

Universal x402 payments — accept or pay crypto on any blockchain, in a couple of lines. Backendless, no fee; settled straight to your own wallet. Major chains preconfigured, any other works out of the box. TypeScript, MIT.

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.

x402 adapter powered by Reineira Settlement Standard (RSS)

This will be used as the repository for the demo with x402 and fastset

Bipa CLI — payment rails for AI agents. Pre-built binaries and managed installer.

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

Self-serve x402 payment infrastructure for AI agents. Pay-per-call APIs with USDC on Base, Solana, and Cosmos.

x402 debugger CLI for Base. bazaar-check, validate, explain, reconcile — read-only, local, Sepolia + mainnet.

Production reference for agentic commerce: protocols (ACP, AP2, x402, MCP), stablecoin rails, agent skills, and the merchant playbooks specs leave out — refunds, multi-chain settlement, catalog discovery, fraud, jurisdiction, receipts. Maintained by Cryptorefills.

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

TypeScript SDK for PayBot – Let your AI agent pay for things

The open x402 index — Find · Route · Leaderboard — for the agent payments economy. 1,100+ tools for AI agents, plus agent402-tollbooth for charging AI crawlers. Run free, or charge per call in USDC on Base.