Agent payment business guides
Follow retail purchases, commerce platform enablement and paid API calls from discovery through payment and recovery.
Evidence, not endorsement
A research and planning tool, not a vendor certification. Sources describe specific products, not every service offered by a company. Unknown means not established by the sources reviewed, not unsupported. grug402 sandbox tests do not test these vendors. Operational owners are suggested team contacts, not legal liability assignments.
Editorial review: 2026-10-08. Evidence older than 90 days needs rechecking; source check dates are not release dates.
An agent buys from a retailer
Understand the buyer, merchant and payment-provider handoffs before opening a checkout to outside agents.
These are HTTP payment analogues, not tests of a retailer's checkout, tax, inventory, shipment, refunds or consumer-protection process.
A commerce platform enables its merchants
Separate a shared platform interface from each merchant's catalog, payment configuration and operational obligations.
grug402 does not certify UCP, ACP or AP2 implementations and does not exercise merchant onboarding, order systems or refunds.
An IT team sells an API or tool call
Trace a paid request across the app runtime, cloud identity, edge policy, payment verifier and settlement network.
Sandbox scenarios model failure classes, not a production CDN, host, wallet or facilitator certification. MPP coverage and network support vary; consult each scenario.