HTTP 402 sat dormant for thirty years. Qubic's feeless payments activate it.
The web has had a "payment required" status code since the beginning — no network could ever settle cheaply enough to use it. Qubic's feeless, sub-second transfers finally make per-request micropayments real. Q+Pay turns that into invoices, a storefront, or a metered API.
Sitting in the HTTP spec since the early web — reserved for a payment mechanism that's only just starting to catch on.
On every chain before Qubic, the toll cost more than the thing it was tolling.
One transaction, wallet to wallet, and nothing lost to network fees.
One lookup, from a service it will never call again — paid for exactly that, and nothing more.
The merchant layer that turns HTTP 402 into a real checkout.
Run a point-of-sale, or plug into your store.
One link in your bio. Fans tip you directly.
Meter any endpoint per call — no API keys needed.
Price in dollars. Q+Pay quotes the QU amount at checkout, every time.
Plus 8 display currencies — USD, EUR, GBP, JPY, CNY, INR, BRL, KRW.
Or 100 QU, whichever's greater — no flat fee stacked on top.
One payments engine, four surfaces
Same invoices, wallets, and settlement underneath — framed for whoever's actually paying you.
Creators & publishers
Sell a single article, an ebook, or a supporter tier — one link, paid straight to your wallet.
Developers & AI agents
Meter an endpoint per call, humans and autonomous agents alike — no API keys, no signup flow.
Retail & in-person
Tap through a cart at the counter, or drop straight into a WooCommerce or Shopify store you already run.
Operations & finance
Revenue trends, accountant-ready exports, and signed webhooks wired straight into your fulfillment.
Every way a customer might pay you
One dashboard, every surface — from a single invoice to a full storefront to a metered API.
Invoices & checkout links
Price in USD or QU, generate a shareable link in seconds, get paid straight to your wallet. On-chain-verified refunds built in.
Tip jars & payment requests
One persistent link that never needs reconfiguring. Open "pay what you want" amounts, with an optional minimum.
Product catalog & POS register
Build a catalog, tap through a cart at checkout — a full in-person point-of-sale, no card reader needed.
Pay-per-request API paywalls
Meter any endpoint or article per call with the x402 protocol. Works for humans and AI agents alike — no API keys to provision.
Prepaid payment channels
High-frequency or agent traffic deposits once, then draws down per request with instantly-verified signed vouchers — no per-call chain wait.
Access grants
One payment can unlock a time-boxed window of access instead of gating every single request — right for human-facing pages.
Wallet-native login
No passwords, no signup form. Sign in with WalletConnect, MetaMask's Qubic snap, a private seed, or a vault file.
Analytics & reports
Revenue trends, customer insights, and accountant-ready CSV/JSON exports — not a black box.
WooCommerce & Shopify
A drop-in WooCommerce payment gateway and a Shopify custom-app bridge — both built on the same invoice API.
Webhooks & email
HMAC-signed webhook notifications on paid/refunded, plus optional email receipts — wire it into whatever runs your fulfillment.
Multi-language dashboard
English, Spanish, French, German, Portuguese, Japanese, and Chinese — switch anytime, per session.
Self-hosted & non-custodial
Payments go straight from customer to your wallet. Q+Pay is the software, not a custodian of your funds.
Payment security is not an afterthought
Every claim below is enforced in code you can read, not a policy document.
01Non-custodial by construction
Funds move directly from a customer's wallet to yours in one on-chain transaction. There is no intermediary wallet, no pooled balance, and no withdrawal step — Q+Pay is never in a position to hold or freeze your money.
02Anti-front-running by default
A Qubic transaction hash becomes public the instant it's broadcast — so a raw tx hash alone can't prove who it belongs to. Every payment carries a server-issued, unpredictable proof embedded on-chain, so only its real payer can ever redeem it.
03Verified against the live chain, always
Recipient, amount, freshness, and single-use status are all checked against the real Qubic network for every payment — Q+Pay never trusts a client's word for what happened on-chain.
04Hardened webhook delivery
Outbound webhooks resolve and pin their destination address before connecting, and re-validate on every redirect — closing the DNS-rebinding gap most naive webhook senders leave open.
Three steps to your first payment
Connect your wallet
Sign in with the Qubic wallet you want payments sent to. That's your whole account — no forms, no approval queue.
Set up your store
Create an invoice, a tip jar, a product catalog, or wire an API paywall — whichever fits how you sell.
Share the link, get paid
A customer pays from their own wallet. The transfer lands in yours directly — no settlement delay, no intermediary.
Priced like a card processor, without the markup
Every payment keeps a 1% protocol fee, or 100 QU, whichever is greater — no flat fee stacked on top, and the net lands in your wallet in the same transaction. Still non-custodial: the fee is credited to a protocol pool, not a company account, and Q+Pay is never in a position to hold or freeze your money. Stripe and Square charge 2.9% plus 30¢. PayPal charges 3.49% plus 49¢.
Meter any endpoint with x402
Gate an API route or an article behind a real on-chain payment. A caller without one gets a standard 402 response describing exactly how to pay; pay once, get the resource — no accounts, no API keys to provision.
- Works with any HTTP client, human or agent
- Optional access grants: one payment covers a window of calls
- Optional prepaid channels for high-frequency agent traffic
- Verifies real on-chain transfers — never trusts a client's word
GET /resource/qdoge-feed HTTP/1.1 HTTP/1.1 402 Payment Required Content-Type: application/json { "x402Version": 2, "accepts": [{ "scheme": "exact", "network": "qubic:mainnet", "amount": "1000", "asset": "QUBIC", "payTo": "<your address>" }] }
Connect your wallet and start accepting payments
No sign-up form. Your Qubic wallet is your account.
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