{
  "slug": "which-networks-does-x402-support",
  "title": "Which networks does x402 support?",
  "description": "x402 is network-agnostic; Coinbase's facilitator settles on Base, Solana, Polygon, Arbitrum, Monad and World, and most paid traffic today is USDC on Base.",
  "lead": "The protocol is network-agnostic. In practice most paid traffic today runs on Base, paid in USDC.",
  "reviewed": "2026-10-29",
  "next_step": "The pages below go deeper on this question.",
  "primary_label": "Decode a 402 challenge",
  "primary_path": "/tools/http-402-challenge-decoder?utm_content=networks_guide",
  "secondary_label": "Verify an endpoint free",
  "secondary_path": "/verify?utm_content=networks_guide",
  "sections": [
    {
      "heading": "What the protocol allows",
      "paragraphs": [
        "x402 identifies networks with CAIP-2 identifiers in the form namespace:reference. Any EVM chain can be expressed as eip155:<chainId>, for example eip155:8453 for Base, and the x402 documentation also defines identifiers for Solana, TON, Algorand, Stellar, Aptos, Hedera, NEAR, Sui, XRPL, Cardano and others. Which of them a given payment can use depends on the facilitator that verifies and settles it."
      ]
    },
    {
      "heading": "What Coinbase's facilitator settles",
      "paragraphs": [
        "Coinbase's CDP facilitator lists Base (eip155:8453), Base Sepolia (eip155:84532), Polygon (eip155:137), Arbitrum (eip155:42161), Monad (eip155:143), World (eip155:480) and Solana. The exact, upto and batch-settlement schemes run on the EVM networks; Solana supports exact and upto. Coinbase reports more than 100 million facilitator transactions across Base and Solana alone. Other facilitators listed in the x402 documentation support their own sets of networks."
      ]
    },
    {
      "heading": "How a buyer learns what an endpoint accepts",
      "paragraphs": [
        "Each paid endpoint states its accepted networks in its 402 response: the accepts array has one entry per scheme, network, asset, amount and payTo address. An agent reads that list and pays on a network where it holds funds.",
        "For a new seller, Base with USDC is the common default. It is the network used in Coinbase's and the x402 project's own quickstart and MCP examples, and the one most agent wallets in those examples are funded on."
      ]
    }
  ],
  "sources": [
    {
      "label": "x402 docs: networks and token support (CAIP-2)",
      "url": "https://docs.x402.org/core-concepts/network-and-token-support"
    },
    {
      "label": "Coinbase: CDP facilitator networks and schemes",
      "url": "https://docs.cdp.coinbase.com/x402/seller/facilitator"
    },
    {
      "label": "Base documentation",
      "url": "https://docs.base.org/get-started/base"
    }
  ]
}