The Sendbase blog
Practical guides on stablecoin payments, self-custodial checkout, and the new world of AI agents that pay for things on their own. Written by the team building payment infrastructure on BNB Smart Chain.
How AI agents can subscribe to SaaS and pay automatically
Let an agent sign up, get an API key, and pay a subscription on its own with a spend-capped wallet, recurring billing, and x402.
Read the tutorial GuideAccepting stablecoin payments on BNB Chain
A complete guide to BEP-20 USDT and USDC on BSC: gas, sponsored gas for customers, settlement, self-custody, and taking your first payment.
Read the guide ExplainerWhat is x402?
How the web's oldest unused status code, 402 Payment Required, became the pay-and-retry standard powering AI agent payments.
Read the explainer GuideChargebacks are killing your margin
What a chargeback really costs, even on legitimate sales, and how final on-chain settlement removes the risk while keeping buyers protected.
Read the guide TutorialHow to issue refunds on stablecoin payments
Yes, you can refund crypto. Full and partial refunds, how on-chain refunds work, why there are no dispute fees, and policy best practices.
Read the tutorial ExplainerWhat is agentic commerce?
The shift to AI agents that buy, sell, and settle on their own, and why stablecoins and x402 are the payment rails that make it work.
Read the explainer GuideUSDT vs USDC: which should you accept?
Reserves, adoption, availability, and fees compared, plus why accepting both is usually the safest, lowest-friction choice.
Read the guide TutorialAdd a crypto checkout in 10 minutes
Three ways to accept stablecoins on your site, from a no-code payment link to a hosted checkout button to the full API.
Read the tutorial ExplainerSelf-custodial vs custodial processors
Who holds your money between the sale and payout, what freezes and reserves really mean, and why custody is the overlooked risk.
Read the explainer TutorialHow to let an AI agent pay for an API with x402
A step-by-step guide to giving an autonomous agent a spend-capped wallet so it can pay per API call in USDT, using the HTTP 402 standard.
Read the tutorial GuideStablecoin payments vs credit cards
Fees, chargebacks, settlement time, and custody compared side by side, so you can decide when stablecoins beat cards for your business.
Read the guide GuideHow to pay international contractors in USDT
Skip slow wires and FX spreads. A practical walkthrough of paying a global team in stablecoins, and how they cash out to local currency.
Read the guideBuild on Sendbase
Open a free, self-custodial account and start accepting stablecoins, paying your team, or wiring up agent payments.