Non-custodial, crypto-only payments — explained for the operators and developers who actually run the money. Pain, mechanics, and how Payzum solves it.
On September 17, 2026 Ripple added Stripe and Tempo's Machine Payments Protocol to the XRP Ledger, next to x402. Two HTTP 402 standards, three chains claiming sessions, zero live commercial volume — and what an API seller should actually do this week.
Studios opened direct web shops to keep the platform's commission — and inherited the platform's hardest job: fraud, global payment coverage and disputes on goods that are delivered in 400 milliseconds and spent the same evening. Top-ups, bundles, battle passes and founder packs in stablecoins, settled non-custodially to your own wallet, with one CSV batch for creators, modders and prize pools.
On September 18, 2026, Stable.com connected to Polygon's Open Money Stack so USDT and PYUSD holders can initiate a bank transfer straight from their own wallet, with no deposit into a platform account first. It is a small integration with a large implication: the exit from stablecoins was the last place merchants were still forced to hand over custody. Here's what it fixes, what it doesn't, and why the money-in side is the half you actually control.
Your payment webhook endpoint is a public URL that moves money: anyone can POST to it, retries arrive twice, and on-chain payments are final. Here's how signed webhooks for crypto payments actually work — HMAC verification, idempotency, fast ACKs and reconciliation — and how Payzum's non-custodial flow means the funds are already in your wallet when the event lands.
On September 9, 2026, Mastercard launched Agent Connect — one integration that makes a merchant's products, prices, availability and fulfillment readable by AI shopping agents. It is the first big agentic-commerce launch aimed at the seller. It also leaves the payment exactly where it was: a reversible card pull. Here's what that asymmetry costs, and the offer format that is already both.
All three settle stablecoins in seconds for cents, so speed and fees don't decide it. Gas token, finality semantics and where your recipients can actually off-ramp do. A practical guide to choosing the chain for your payout run.
On September 15, 2026 HM Treasury laid a draft that lifts UK qualifying stablecoin transfers out of dealing and arranging. A day later the FCA opened the authorisation gateway. Read together, they draw a perimeter around everyone who stands between the payer and the merchant — and leave the merchant's real question unanswered until 2027.
A solar job is not one payment. It is a deposit that has to clear before you can order modules, an equipment bill priced in dollars on net-30, a crew to pay on install week, and a five-figure final balance collected at commissioning — months after the customer's card was first charged and well inside the window in which they can still dispute it. Payzum is a non-custodial, crypto-only processor: every one of those moments is a payment link, an invoice or a QR that settles USDC or USDT straight to a wallet you control, in seconds, with no acquirer in the middle and no chargebacks.
On September 1, 2026, EMVCo published a draft framework proposing "Intent Services" — a shared, stateful registry of consumer-authorised intent for card-based agentic payments, open for comment until September 30. Here's what it admits about pull payments, and why an API seller can charge AI agents today without waiting for it.