Your cards, working.
Tell Fiber which cards you carry — names, never numbers — and it tells you which one to pay with for the lowest true cost. Your card's own reward stacks on top of the cashback.
Ask. See the true cost. Keep the record.
One job today. Then the job after checkout. Built and roadmap steps are labeled as such.
Illustration
DEMOSee how an ask works
Comfortable red joggers under $150 for travel.
True cost.
The cost you pay, not the cost on the tag.
A sticker price is an opening offer. Fiber runs every cashback rate and every card reward it can confirm, and hands you one number, the true cost: what leaves your pocket. Stop comparing sticker prices. Compare true costs.
Example. Amounts are illustrative. The card line shows only when Fiber knows your card.
Sticker
$148
Cashback
−$9
Your card's reward
−$3
True cost
$136
The number is arithmetic, not opinion.
Rates, eligibility and the math come from one cent-exact calculation. The assistant explains the number; it never makes one up.
Unknown is never zero.
If Fiber can't confirm a reward, it shows nothing — not $0. Card cashback appears only when Fiber knows the selected card.
Estimated is not final.
Before you buy it's an estimate. Pre-purchase estimates, pending, payable, paid, returned, and unavailable are distinct states.
Same math on every surface.
Compact card, expanded card, chat explanation, and order view read the same calculation.
Paid out where the user chooses.
Bank, card, or an approved digital asset. The destination is the user's choice. The amount is the same either way.
Say “watch it.”
Fiber checks the price once a day and flags the drop in the app — your target, or 5% or more. Saving keeps a deal. Watching checks it. Buying stays yours.
Fiber isn't only an app. It's shopping tools any assistant can call.
Seven tools, live behind a Fiber key today. Add Fiber to an assistant that can carry your key and ask it to shop: it finds products, shows the true cost, and hands you a tracked link — in the conversation you started. Directory listing next.
BUILTREADY TO LISTChatGPTClaudeGrok
- search_productsSearch products; each item's price and estimated cashback rate. Ordered by relevance, never by how much Fiber is paid.
- get_cashback_rateThe estimated cashback rate for one merchant, by its domain.
- get_card_stackThe same search, plus which of the shopper's own saved cards to pay with for the lowest true cost.
- get_dealsThe current curated list of cashback deals.
- create_tracked_linkA tracked link for a product that earns the shopper cashback when they buy.
- get_earningsThe shopper's own cashback activity — merchant, date, recorded status, estimated cashback.
- get_purchase_statusWhether the store has confirmed the shopper's cashback purchases yet — pending, confirmed, or cancelled.
How it works.
Your assistant asks Fiber for products, prices, and rewards, then hands you a tracked link. You stay in the conversation you started.
Human in the loop.
Every purchase is yours to confirm. A headless autonomous buyer endpoint is a later product, not this surface.
Get notified.
When Fiber is listed in your assistant's connector directory, we email the waitlist first.
Join FiberSettlement is on chain. The user picks the asset.
Agents need payouts that are programmable and global. Every purchase earns. The buyer chooses where it lands.
Why on chain
Agents need payouts that are programmable and global. Settlement that can move with the buyer, not with a closed program.
What the user earns
Every purchase earns. The buyer chooses where it lands: bank, card, or an approved digital asset.
How it stays safe
Fiber is not a custodian. Your earnings settle to a wallet you control. Regulated activity sits with licensed partners.
Chain-agnostic by design.
Earn today. Spend next.
ROADMAPToday: route it
Earnings route to the destination the buyer chooses.
Next: spend through your agent
The same agent will be able to spend what it earned, on the next buy.
Next: spend anywhere
A partner-issued spend surface, licensed at every step.
Next: spend in the network
Value will stay inside Fiber when the buyer wants it to.
Why it matters
Earnings that can only sit unused are a coupon. Earnings the agent can spend become a loop.
How it stays clean
Partner-issued and licensed at every step. Fiber is not a custodian. Regulated activity — issuing, holding, and moving funds — sits with licensed partners.
After checkout.
ROADMAPPrice watch is built. Receipts, returns, recalls and subscriptions follow, in that order. Fiber will never touch your personal inbox.
- You'll get a Fiber address to give stores at checkout, and every order will land in one place.
- Return-window countdowns will sit on the order, not in a forgotten email.
- Price-drop refund claims will be prepared for the buyer to confirm.
- Warranty registry, recall alerts, and subscription detection will follow the same record.
- Each store will get its own alias — if your email ever leaks, you'll see exactly who sold it.
Tell Fiber what you're shopping for.
Join Fiber