Getting Started • 3 min read

Supported Networks

Chains and tokens supported by FareSide

FareSide supports multiple blockchain networks through the x402-rs facilitator.

EVM Networks

Network	Chain ID	Status	Testnet
Base	8453	✅ Available	Base Sepolia (84532)
Polygon	137	✅ Available	Polygon Amoy (80002)
Avalanche C-Chain	43114	✅ Available	Avalanche Fuji (43113)
Sei	1329	✅ Available	Sei Testnet (1328)
XDC	50	✅ Available	-
XRPL EVM	1440000	✅ Available	-

Non-EVM Networks

Network	Status	Testnet
Solana	✅ Available	Solana Devnet

Supported Tokens

EVM: EIP-3009 Compatible Tokens

Any token that implements EIP-3009 (Transfer With Authorization) is supported for x402 payments on EVM networks.

EIP-3009 payments require EIP-712 typed data signing with a smart contract “domain” name and “version”. These are provided in the payment requirements extra field. When a 402 response is returned, it includes the token details:

{
  "accepts": [
    {
      "scheme": "exact",
      "network": "base-sepolia",
      "maxAmountRequired": "10000",
      "resource": "http://localhost/weather",
      "description": "Weather API access",
      "payTo": "0xBAc675C310721717Cd4A37F6cbeA1F081b1C2a07",
      "maxTimeoutSeconds": 300,
      "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
      "extra": {
        "name": "USDC",
        "version": "2"
      }
    }
  ],
  "x402Version": 1
}

The extra field contains the EIP-712 domain:

name - The token’s EIP-712 domain name
version - The token’s EIP-712 domain version

Common EIP-3009 compatible tokens include USDC, EURC, and other Circle stablecoins. Any token implementing this standard can be used for x402 payments. If extra is absent, the implementation defaults to USDC.

Solana: Any SPL Token

All SPL tokens on Solana are supported for x402 payments. This includes:

USDC - Circle’s USD stablecoin
EURC - Circle’s EUR stablecoin
MXNe - Brale’s Mexican Peso stablecoin
Any other SPL token

Choosing a Network

For Development

Use testnets to avoid spending real funds:

Base Sepolia - Recommended for EVM development
Solana Devnet - Recommended for Solana development

Get testnet tokens from faucets:

Base Sepolia Faucet to get native Base Sepolia ETH
Solana Devnet Faucet to get Solana Devnet SOL
Circle Faucet to get Circle’s test tokens (USDC, EURC,…)

For Production

Choose based on your users and use case. All supported networks offer low fees suitable for micropayments.

For maximum user reach, accept on multiple chains and let users pay where convenient. You could later bridge/convert tokens, if enough value accumulated on a chain.

Configuration

FareSide Hosted Facilitator

The FareSide hosted facilitator supports all networks listed above. Simply specify the network in your price tag:

// Hono example
app.use(paymentMiddleware(
  "0xYourWallet",
  {
    "/api/data": {
      price: "$0.01",
      network: "base",  // or "base-sepolia", "solana", etc.
    }
  },
  { url: "https://facilitator.fareside.com/YOUR_API_KEY" }
));

// Axum example
let usdc = USDCDeployment::by_network(Network::Base);  // or Network::Solana, etc.

Adding New Networks

FareSide’s network support is determined by x402-rs. To request support for additional networks:

Open an issue on x402-rs GitHub
Or contact us on Telegram

Next Steps

Quickstart - Start accepting payments
Self-Hosting - Run your own facilitator