Have an agent test coupons before you pay

A builder made a shopping skill that checks current coupon feeds at checkout and applies any valid offer before payment.

Done with Custom agentยท Intermediate

What they did
They created mcclipface as a skill for shopping agents that activates just before checkout. Rather than letting the agent continue at full price, it looks up live coupon sources for that merchant and tries any code or deal that seems usable. The builder tested it on real purchases.
How it went
Across three real checkouts, it found and used a 20% discount, a BOGO offer, and 10% off, saving $11.48 in total. It does not work on every store yet, since coverage is still early and expanding.
Tips
Ask the agent to verify current coupon sources for the specific merchant and cart, then pause before payment so you can review the applied discounts. Keep in mind that success will vary by store, even though the user pays nothing extra because the system is funded through merchant referral fees.

Try it yourself with Claude Code

Build a shopping skill for [store or merchant] that runs right before checkout. Check current coupon feeds and other live discount sources for codes or offers that match my cart: [cart details]. Try the valid options, apply any that work, and tell me which ones saved money and by how much. Stop before the payment step, show me the final total and the applied discounts, and wait for my approval before submitting the order or charging my card.

Fill in the [brackets]. Agents can make mistakes, so review anything before it is sent, paid or deleted.

Read the original on reddit.com โ†—

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