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x402 paymentsConfigured chains + wallets
x402 payments

Configured chains + wallets

Review the chains, tokens, and wallets used by x402-enabled Aly deployments.

Configured EVM chain ids, USDC addresses, compatible wallet categories, fees, and the per-site price ceiling.

x402 is chain- and wallet-agnostic on its face — the protocol just carries a signed transfer authorization. Aly's configured rollout path uses EVM rails: Base, Ethereum, Polygon. USDC is the default asset.

Production status
The live aly.store protocol discovery currently reports x402 as disabled. Use these wallet and chain details for deployments where crypto payments have been explicitly enabled.

Networks

NetworkChain idUSDC addressNotes
Base84530x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913Default for fast, low-fee.
Ethereum10xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48L1 mainnet.
Polygon1370x3c499c542cEF5E3811e1192ce70d8cC03d5c3359USDC native.

The merchant configures which networks to advertise from Settings → Crypto payments. The 402 challenge body lists each enabled network in order; the buyer's wallet picks whichever it can sign.

Wallets

Any wallet that signs EIP-712 typed data on the chosen network should work when x402 is enabled. Compatible wallet categories include:

  • MetaMask (browser + mobile).
  • Coinbase Wallet (browser + mobile).
  • Rainbow (mobile).
  • WalletConnect-compatible apps via Reown.

For agent-side wallets, any viem/ethers-compatible signer drives x402:

  • @x402/evm with a viem account.
  • @x402/evm with an ethers v6 signer.

Tokens

USDC is the canonical asset. Operators can extend the accepted-token allowlist for their site — additional ERC-20 stablecoins, or other tokens for niche stores. The 402 response advertises every accepted token; the buyer picks one.

Beware of bridged vs native USDC
On Polygon, native USDC and bridged USDC.e are different ERC-20s. Aly defaults to native. If your wallet only holds USDC.e, switch wallets or bridge first — the 402 will reject a transfer of the wrong asset.

Fees

Aly takes no platform fee on x402 settlement. The merchant receives the full maxAmountRequired; the buyer pays plus gas on the chosen network. Base typically clears for under a cent of gas; Ethereum mainnet is order-of-magnitude pricier.

Limits

x402 is intended for micropayments. Each site has a configurable price ceiling (default $20 equivalent) above which the product becomes ineligible — the buyer is sent through the hosted UCP checkout instead. The ceiling exists to limit blast radius if a nonce or signature flow were ever compromised.

Updated

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