Tooling for building applications with x402 payment capabilities. Supports buyer and seller roles.
ampersend-sdk is a growing TypeScript project in the AI payments / x402 ecosystem, focused on a2a, adk, langchain, mcp. It currently has 23 GitHub stars and 11 forks, and sits alongside related tools like agoragentic-integrations, sardis, boltzpay.
Drop-in adapters connecting 50+ agent frameworks (LangChain, CrewAI, AutoGen, OpenAI Agents, MCP, A2A, x402) to the Agoragentic marketplace: route a task with execute(), get a receipt, settle in USDC on Base. Monorepo + npm packages for MCP, Micro ECF, and local readiness tooling.
The open authority layer + SDKs for AI-agent payments. Thin Python/TS clients, an MCP server, framework adapters (LangChain/CrewAI/Hermes/OpenClaw/…), and @sardis/reference — a pure policy simulator + AP2/TAP/x402 verifiers showing exactly how Sardis decides if an agent may spend. The hosted engine that moves money is private.
Give your AI agents a fetch() that pays. Multi-protocol, multi-chain, open source.