x402 is an open protocol for resolving HTTP 402 Payment Required, governed by the Linux Foundation's x402 Foundation. A client signs an EIP-712 USDC payment authorization, sends it in the X-Payment header, and retries the request. Settlement happens on Base L2.

How can Xenarch payments be 0% fee?

Xenarch is not in the money flow. Every payment goes wallet-to-wallet on-chain. No Xenarch contract takes a cut, no balance sits with us. The 0% claim is structural, not promotional.

How can payments need no gas token?

USDC on Base is the only token the payer holds. The settlement layer handles on-chain submission so the wallet stays single-asset — no ETH, no SOL, no gas coin of any kind. This is the standard x402 settlement experience.

No. Xenarch is the payment infrastructure between wallets you already control. Xenarch never holds, custodies, or signs for funds. Every payment is verifiable on Basescan.

Which network and asset does Xenarch use?

USDC on Base mainnet (chain ID 8453). Direct wallet-to-wallet settlement. Every transaction is verifiable on Basescan.

HTTP for money

The open payment rail for the agentic internet — any wallet pays any wallet, human or agent. USDC end to end, gasless, 0% fee, on Base.

Read the docs

● live /Base mainnet /chain 8453 /USDC /x402 /dashboard · Jun 21

The shift / why this exists

Humans are leaving the internet. They stop searching, comparing, and clicking — they just tell an agent what they want. Agents can already read, plan, and act; the one thing they can’t do is transact. Xenarch is the economic layer they’re missing.

No gas token

Hold USDC, nothing else. No ETH to top up, no bridging, no failed transactions.

0% fee

Nothing sits in the flow to take a cut. 0% is structural — not a promo that expires.

Non-custodial

Funds move wallet to wallet on-chain. We can’t hold or freeze them. Verify on Basescan.

Borderless

An address is the destination, anywhere on Earth. No SWIFT, no FX, no country gate.

Permissionless

No KYC, no merchant account, no approval queue. A wallet is the whole signup.

Products / three surfaces, one rail

One rail underneath. Three ways onto it — for whoever reads, whoever sells, and whoever transacts.

for publishers

Gating

AI reads. AI pays.

AI agents are the web’s new dominant readers. Detect the crawl, answer with HTTP 402, settle USDC per request — straight to your wallet, every read priced.

install on

WordPress Joomla Cloudflare FastAPI pay.json

fee0% to Xenarch · 100% to you · $0.001 min

One link. Humans pay. Agents pay.

One URL, paid by humans through a hosted checkout and by agents via x402 — same destination, same wallet. Bounties and performance pricing ride the same rail.

11 kindscheckout · subscription · invoice · bounty · API metering · +6

integrate viahosted URL · script · API & SDK · agent-callable

Join the waitlist

for builders

Agents

Make your agent an economic peer.

Your agent doesn’t just call tools — it transacts. Hard spend caps, allowlisted scope, signed receipts, and member-since trust on every counterparty before a payment signs.

installnpx @xenarch/agent-mcp

works with

Claude Cursor LangChain CrewAI LangGraph + AutoGen

See agent wallets

Reference / specs & answers

How this compares

Xenarch	USDC · 0% · non-custodial · borderless · open
Cloudflare PPC	gating only · Cloudflare-only · custodial · takes a cut
Stripe MPP	closed protocol · settles on Tempo (Stripe-co-owned L1) · custodial · Stripe pricing
Stripe ACP · Google AP2 · Visa TAP	card-rail agent checkout · KYC, accounts, 2–3% + ~$0.30 floor · cards architecturally cannot do account-less sub-$1
TollBit	enterprise licensing · manual contracts · no micropayments

Questions

what is x402

Open protocol for HTTP 402, governed by the Linux Foundation’s x402 Foundation. Client signs an EIP-712 USDC authorization, sends it in X-Payment, retries. Settles on Base L2. More →

0% how

No Xenarch contract in the money flow. Every payment goes wallet-to-wallet on-chain. Structural, not promotional.

no-gas how

USDC is the only token any wallet holds. The settlement layer handles on-chain submission so the wallet stays single-asset.

custody

None. Xenarch never holds, signs for, or touches funds. Every payment verifiable on Basescan.

network

USDC on Base mainnet, chain 8453. Direct wallet-to-wallet settlement.