@checkoutkit/express

Express adapter for @checkoutkit/server.

pnpm add @checkoutkit/server @checkoutkit/express

import express from "express";
import { createAcpServer } from "@checkoutkit/server";
import { createExpressMiddleware } from "@checkoutkit/express";

const acp = createAcpServer({ backend, basePath: "/acp" });
const app = express();

app.use("/acp", express.raw({ type: "*/*", limit: "1mb" }), createExpressMiddleware(acp));

Mount it before any JSON body parser. Signature verification hashes the exact request bytes; express.json() would hand the engine a re-serialised copy and every signed request would fail.

Typed structurally rather than against @types/express, so it works with Express 4, Express 5 and Connect without adding a dependency.

CheckoutKit is an independent community implementation of the Agentic Commerce Protocol. It is not affiliated with, sponsored by, or endorsed by OpenAI or Stripe.

Part of CheckoutKit · Apache-2.0