Marginfence

Agentic checkout creates a machine-to-machine path from shopping intent to transaction. The supplied research confirms two production-grade commerce protocols and recent expansion of live catalog and multi-item capabilities. It found no reviewed product focused specifically on merchant margin, offer-stacking and quantity constraints at that boundary; reviewed fraud vendors solve a different problem. This is a bounded feature comparison, not proof of exclusivity.

Marginfence would preserve merchant, channel, agent identity assertion, customer authorization reference, cart version, item, quantity, catalog price version, promotion version, tax estimate, shipping estimate, fee estimate, return-cost assumption, landed-cost source, landed-cost timestamp, currency, policy version, price floor, contribution-margin rule, stacking rule, quantity cap, exception authority, evaluation result, reason code, re-quote proposal, human escalation, merchant decision, checkout response, payment-provider acknowledgment, order-system readback, settlement, refund, return and reconciliation as distinct records.

Landed cost can be incomplete or stale. Taxes, shipping, payment fees, returns, inventory allocation, marketplace commissions and foreign exchange can change the result. A policy calculation is a decision aid based on declared inputs, not an accounting determination or proof that an order will be profitable. The service may refuse, re-quote or escalate only within current merchant-approved authority. It must not silently change prices, discriminate among protected customers, reserve inventory, capture funds, cancel orders or treat an agent's intent as customer authorization.

The pilot should use valueless sandbox carts and simulated provider responses. The likely buyer is a commerce-operations, pricing or finance owner at a merchant adopting agentic checkout, but merchant scale, protocol traffic, policy ownership, cost-data quality, latency tolerance, budget and demand beyond the confirmed infrastructure remain unverified.

A commerce-operations, pricing or finance owner responsible for enforcing approved offer and margin policies in agentic checkout channels.