Warpay402 Gateway
Enables x402 V2 monetization for Cloudflare Monetization Gateway, facilitating payment processing and fee splits for services built on Cloudflare.
Provides a monetize middleware for Hono HTTP APIs, allowing developers to add x402 payment challenges and fee splits to their routes.
Offers a RedisNonceStore for distributed nonce locking, preventing signature replay attacks in payment verification.
Supports distributed nonce locking with Upstash Redis, enabling replay protection and scalable payment verification.
@warppay402/server ⚡
Instant x402 V2 monetization SDK and self-hosted infrastructure for Model Context Protocol (MCP) AI tools, Hono HTTP APIs, Cloudflare Monetization Gateway, Base, and Solana.
@warppay402/server allows developers to monetize any MCP tool or HTTP API route in a few lines of code. It automatically generates standard x402 V2 HTTP payment challenges, verifies gasless EIP-712 / Solana L1 signatures, enforces platform fee splits, protects against prompt injection threats, and prevents signature replay attacks.
Official Site: https://www.warppay402.com
Features
x402 V2 Compliant: Standardized payment challenge headers (
PAYMENT-REQUIRED,PAYMENT-SIGNATURE,PAYMENT-RESPONSE).Multi-Chain Native: Multi-chain challenge generation supporting Base Mainnet (
eip155:8453) and Solana Mainnet-Beta (solana:5eykt...) out of the box.Gasless Off-Chain Signing: Clients sign
TransferWithAuthorization(Base) or pre-signed SPL-USDC transactions (Solana) without non-custodial friction.Automated Platform Fee Split: Configurable fee split in basis points (e.g., 50 BPS = 0.5%) routed directly during facilitator settlement.
x402-Guard Security: Pre-flight middleware protecting endpoints against prompt injection attacks, payload buffer overruns, and high-velocity traffic spikes.
MCP Native Decorator: Seamlessly wraps tools written for the Model Context Protocol.
Replay Protection: Includes built-in
MemoryNonceStoreand distributedRedisNonceStoredrivers to prevent double-spending or signature reuse.Edge Compatible: Zero Node.js-only API dependencies; runs seamlessly on Cloudflare Workers, Vercel Edge, Node.js (18+), and Deno.
Related MCP server: obolpay-x402-mcp
Installation
npm install @warppay402/serverUsage Case 1: Monetizing Multi-Chain Hono HTTP APIs
import { Hono } from "hono";
import { monetize } from "@warppay402/server";
const app = new Hono();
const monetizeConfig = {
payTo: "0xYourMerchantWalletAddress", // Default Base EVM Wallet
platformWallet: "0xYourPlatformTreasuryWallet",
platformFeeBps: 50, // 0.5% fee split
guard: true, // Enables x402-guard security scanning
facilitatorUrl: "http://localhost:3001",
// Multi-Chain 402 Challenge Configuration
accepts: [
{
scheme: "exact",
network: "eip155:8453", // Base Mainnet
asset: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", // Base USDC
payTo: "0xYourMerchantWalletAddress",
},
{
scheme: "exact",
network: "solana:5eykt4wA89m8E5b9B5658p445VTc28", // Solana Mainnet-Beta
asset: "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v", // SPL-USDC
payTo: "YourSolanaPhantomPublicKey",
}
]
};
app.use(
"/api/data",
monetize({
...monetizeConfig,
price: "0.01", // $0.01 USDC
})
);
app.get("/api/data", (c) => c.json({ status: "success", content: "Monetized Payload" }));
export default app;Usage Case 2: Monetizing MCP (Model Context Protocol) Tools
import { createMonetizedMCPTool } from "@warppay402/server";
const originalTool = {
name: "web_scraper",
description: "Extract clean Markdown content from URLs",
inputSchema: { type: "object", properties: { url: { type: "string" } } },
handler: async ({ url }: { url: string }) => {
return { markdown: "# Cleaned Markdown Content" };
}
};
export const monetizedTool = createMonetizedMCPTool(originalTool, {
price: "0.02", // $0.02 USDC
payTo: "0xYourMerchantWalletAddress",
platformWallet: "0xYourPlatformTreasuryWallet",
platformFeeBps: 50
});Usage Case 3: Distributed Nonce Locking with Redis / Upstash
import { Redis } from "@upstash/redis";
import { monetize, RedisNonceStore } from "@warppay402/server";
const redis = new Redis({
url: process.env.UPSTASH_REDIS_REST_URL!,
token: process.env.UPSTASH_REDIS_REST_TOKEN!
});
app.use(
"/api/v1/compute",
monetize({
price: "0.10",
payTo: "0xYourMerchantWalletAddress",
platformWallet: "0xYourPlatformTreasuryWallet",
nonceStore: new RedisNonceStore(redis),
nonceTtlSeconds: 300
})
);License: MIT © WarpPay402
This server cannot be installed
Maintenance
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