Payzum Blog

Crypto Payments Blog

Non-custodial, crypto-only payments — explained for the operators and developers who actually run the money. Pain, mechanics, and how Payzum solves it.

Stablecoins

OUSD rewards: Open USD went live paying the platforms that circulate it, not the people who hold it — what that means for merchants

Open USD (OUSD) went live on September 30, 2026 on Ethereum, Solana, Base and Tempo, issued by Stripe's Bridge, with free 1:1 mint and redemption through Mastercard, Stripe and the Visa Stablecoin Platform (Coinbase from October 1) and $1B+ in launch liquidity from its five founding partners. Its economics are the story: nearly all reserve income goes to the companies that distribute it, weighted by the supply and activity they drive, plus equity over four to five years. US law bars issuers from paying holders yield for simply holding, so the value travels through platforms, and some of them pass part of it on as rewards. This analysis explains how OUSD rewards work, shows that the pattern is already inside checkout (Shopify's USDC credits and buyer cashback), and argues that stablecoin float is turning into a marketing budget aimed at steering which token a merchant takes and where the balance sits. It closes with five questions to ask before accepting a stablecoin rewards offer, what changes for stores, exporters, counters and API sellers, and the non-custodial alternative: payments that settle straight into a wallet the merchant controls.

17 min read
E-commerce

How do I accept USDC payments on WooCommerce?

Install Payzum's open-source WooCommerce plugin, paste an API key and webhook secret, and connect the IPN URL. Buyers then pay USDC or USDT on a hosted checkout, and a signed webhook marks the order paid. Here is the full setup, every setting on the screen, which order status you will see at each step, block checkout and HPOS support, and what the plugin does not do.

17 min read
E-commerce

Are there open-source crypto payment plugins for e-commerce platforms?

Yes — 29 of them. Payzum publishes its official integrations for WooCommerce, Magento 2, PrestaShop, Shopware 6, Shopify, WHMCS, GiveWP, Medusa, Saleor and 20 more platforms as public repositories under MIT, GPL or OSL licenses. Here is the complete list by category, with the license and install path for each, why open source matters for the one plugin that decides an order is paid, and a 15-minute checklist to audit how the webhook is verified and where the funds go before you install it.

18 min read
Stablecoins

Citi Coinbase stablecoin payments: a big-bank acquirer now takes stablecoins at checkout — and converts them before the merchant holds one

On September 28, 2026, Citi and Coinbase expanded their partnership: Citi's institutional clients can accept stablecoin payments at checkout through Spring by Citi, the bank's payment acceptance platform, with Coinbase Payments powering acceptance. Coinbase converts the stablecoins into fiat and Citi settles as bank of record, so the merchant never holds, custodies or manages a token. The same release launched the opposite pipe — Coinbase Virtual Accounts, powered by Citi, convert incoming fiat into stablecoins. This analysis reads the design as a new tender inside an acquirer rather than a new rail, lists what survives the conversion (reach, balance-sheet simplicity) and what doesn't (speed, finality, the token itself), places it in a month in which five banks put stablecoins everywhere except a merchant's wallet, and offers a decision guide on where the conversion should happen. Then it shows the non-custodial alternative that exists today: settlement directly into a wallet the merchant controls, with optional auto-convert to USDC or USDT.

16 min read
Sneaker Store

Accept Crypto Payments at Your Sneaker Store, No Chargebacks

A fresh QR per sale at the counter on release day, expiring payment links for draw winners and Instagram or WhatsApp holds, hosted checkout or a drop-in plugin for the web store, and stablecoin payouts to consignors and walk-in sellers — every payment final in seconds, settled to a wallet your store controls. No stolen-card grails, no “it was fake” chargebacks months after the pair shipped.

17 min read
Agentic payments

Meta Muse agent checkout: Amazon blocked it, Shopify and PayPal opened the door — what merchants should decide now

Meta launched Muse on September 8, 2026 with Stripe's Link wallet built in. Within two weeks it was the top app in the US App Store, Amazon had blocked it, and Shopify and PayPal had opened their merchants to it. Every Muse purchase still runs on card and wallet rules. What letting shopping agents in gets you, what it doesn't change, and the channels a merchant can own directly.

17 min read
Bike Shop

Accept Crypto Payments at Your Bike Shop, No Chargebacks

A fresh QR at the counter for e-bikes, parts and workshop tickets, payment links for phone and web orders, expiring invoices for special-order and custom-build deposits, rentals and guided rides paid from abroad, and subscriptions for service plans — every payment final in seconds, settled to a wallet your shop controls. No stolen-card e-bike orders, no chargebacks on a frame built to someone's size.

16 min read
Non-custodial

Bitget hack: withdrawals froze for a week while deposits stayed open — why merchants shouldn't get paid on an exchange

On September 24, 2026 attackers drained about $387.5 million from Bitget's hot and warm wallets by spoofing transaction data inside its backend. Withdrawals paused and restart in phases through October 2 — USDC and fiat last — while deposits and trading stayed open. Bitget says balances are intact and its protection fund covers the loss. What that means for any business whose customers pay into an exchange deposit address, and how to move crypto revenue to a wallet you control.

15 min read
Agentic payments

Sell market data to AI agents: Coinbase just gave trading agents a USDC balance to buy it

On September 22, 2026 Coinbase for Agents added US stocks and x402 payments, so trading agents inside ChatGPT, Claude, Perplexity and Grok can pay a few cents per call for market data from their owner's USDC balance. What that means for anyone who sells financial data, analytics or models — and how to price, list and serve an agent buyer without rebuilding your API.

18 min read