Request01
GET /gpu/hour
402 Payment Required
0.41 USDC · pulsechain
x402 Facilitator & Agent Payments SDK
Payment
Required,
Solved.
Accept agentic payments & micro-payments on every major chain with one integration.
Your API answers HTTP 402. The buyer's agent signs a USDC transfer. qWICKpay settles it on-chain.
no accounts, no API keys, never touching your money.
Live chains are shown in green below
Read how it works
Authorize02
X-PAYMENT eyJzaWduYXR1cmUi…
signed by the agent's key
exact amount · exact address
no account · no API key
Settle03
200 OK · settled
tx 0x9f2a… · gas paid by qWICKpay
merchant paid directly
Settlement networksPulseChain first
PulseChain
RobinHood
Base
BSC
Polygon
Arbitrum
Avalanche
Monad
HyperEVM
Optimism
Unichain
01 · The round trip
One HTTP round-trip. Money moves once.
Agents don't have credit cards. They have keys. x402 turns one HTTP round-trip into a settled micro-payment — from a fraction of a cent up — with the protocol's own 402 semantics, not a bolted-on checkout.
Step 01
Your API names its price
A request arrives without payment. Your server answers 402 with the amount, the asset and the address it wants paid — machine-readable, in the response header.
HTTP/1.1 402 Payment Required
Step 02
The agent signs
The buyer's agent signs a USDC transfer for exactly that amount to exactly your address, and retries the same request carrying the signature. No account, no key exchange, no checkout page.
X-PAYMENT: eyJzaWduYXR1cmUiOi…
Step 03
qWICKpay settles it
We verify the signature, check the funds, broadcast the transfer and pay the gas. Your server delivers the thing that was bought. One round trip, start to finish.
200 OK · settled: true
A facilitator relays and settles. It never touches your money.
The buyer's signature names your address and the exact amount. qWICKpay broadcasts it and pays the gas. Nothing to custody, nothing to refund.
Payer
Merchant
qWICKpay · verifies, broadcasts, pays gas
02 · The terms
The terms, before you ask.
One endpoint, many chains. PulseChain gets its first legitimate agentic payment rail; Robinhood Chain, Base, BSC, Polygon, Arbitrum, Avalanche, Monad, HyperEVM, Optimism and Unichain ride the same box.
Price
3 free to prove it.
Then a flat fee per settlement, priced per chain — PulseChain $0.002 · Base $0.0009 · BNB & Polygon $0.005 — never a percentage of what moves.
Custody
None. Ever.
Payer to merchant, directly. Nothing to custody, nothing to refund.
Onboarding
No accounts.
No API keys.
Your server answers 402. That is the whole integration surface.
03 · The honest version
x402 is an open protocol — started by Coinbase, now stewarded under the Linux Foundation — and qWICKpay is one facilitator implementation of it, run by the team behind compute.pangle.online, whose GPU rail is qWICKpay's first merchant. Every settlement lands on a public receipts tape. Live since 28 Aug 2026: the first settlement — one RTX 4090 hour on that rail — cleared on Base through the facilitator at 402.wick.pics. The docs are at /docs.