Coinbase’s x402 Facilitator Launches on Polygon

TL;DR The Coinbase x402 Facilitator is adding support for the Polygon network. This means x402 developers can now accept USDC payments on Polygon, Base and Solana with gas sponsorship and built-in compliance.

x402 is an open payment standard designed to enable seamless value transfer across the internet for humans, apps, and AI agents. Today, the Coinbase Developer Platform (CDP) x402 Facilitator adds support for Polygon.

With this update, developers can use CDP’s hosted, production-ready facilitator to accept USDC on Polygon, which powers leading applications, like Polymarket. This combines enterprise-grade infrastructure with one of the most active ecosystems for agentic commerce and brings gas-sponsored transactions and built-in compliance to teams building on Polygon.

Connecting the Agentic Frontier

The agentic economy, where AI agents and APIs transact autonomously, requires infrastructure that can handle fast, low-cost, high-volume transactions. Networks optimized for quick settlement and minimal fees are essential to make these machine-to-machine payments viable.

Polygon has emerged as one of those networks, with sub‑2‑second settlement and low fees that support microtransactions like pay‑per‑request RPC calls and real-time data access. By adding Polygon support, the CDP x402 Facilitator brings production-ready, compliance-first infrastructure to this growing ecosystem, making it easier for developers to power agent-driven payments on Polygon using x402.

What the CDP Facilitator Brings to Polygon

While the Polygon ecosystem already features several community facilitators, the CDP Facilitator offers a unique institutional-grade layer for developers moving into production:

• Simplicity: Sellers on Polygon can now accept payments without managing their own blockchain nodes or gas inventories.

• Built-in compliance: Every transaction is backed by automated KYT (Know Your Transaction) screening, ensuring that agentic commerce remains safe and compliant. CDP Facilitator prevents payments to OFAC sanctioned addresses, as well as payments to addresses associated with other high-risk categories.

• Gasless experience: The facilitator handles all gas sponsorship on the backend. Your agents pay in USDC; we handle the rest.

• Cost-efficiency: Start for free with 1,000 transactions per month, then scale with a flat fee of $0.001 per transaction.

With this launch, you can now add CDP’s Polygon support to your app with a single line of code, indicating polygon as the network within x402’s paymentMiddleware:

import { facilitator } from "@coinbase/x402";

import { paymentMiddleware } from "x402-express";

app.use(   paymentMiddleware(

    {

      "/protected": {         accepts: { 

          scheme: "exact",

          price: "$0.10", 

          network: "eip155:137", // CAIP-2 for Polygon mainnet 

          payTo: "0xYourAddress"

        }       }

    },

    new x402ResourceServer(new HTTPFacilitatorClient(facilitator))

      .register("eip155:137", new ExactEvmScheme())

  ) );

The bottom line

Polygon support is part of our broader commitment to making x402 the default standard for internet-native payments. Whether you’re building an autonomous AI agent on Base, a DePIN resource discovery tool on Solana, or a high-frequency data API on Polygon, your payment stack doesn’t have to change.

The agentic economy isn't a winner-take-all race between chains; it’s a collaborative effort to rebuild how value moves across the internet. By expanding CDP’s x402 support to Polygon, we’re giving developers the flexibility to build on the rails they prefer, while maintaining the security and magical developer experience of the Coinbase ecosystem.

To get started, check out our updated Network Support Guide or dive into the Quickstart for Sellers to go live on Polygon today.