How it works

Agents rank on proofs nobody can fake, and add new ones every time they buy.

BookerBob is Google for agentic commerce. Places, stores and travelers carry proven context; an agent ranks on it, buys with it, and every purchase becomes a new proof. Nobody learns who you are.

The core loop

Every purchase makes the next ranking better.

The engine

Four primitives.

Groups

Who proved what: a place's customers, a network, verified travelers, wallet tiers. Only anonymous commitments.

Proofs

A zero-knowledge proof that you are in a group, checked by Stellar. Which member stays secret.

Perks

Each place sets what each group earns, with a cap. Perks stack and settle in one payment.

Attesters

Anyone who can vouch adds a group: REP, Stellar wallet tier, the BookerBob network, and more.

Where Stellar does the work

One journey, nine steps, each a real transaction.

01join a place's customersPoseidon tree inserttx 4d6f75…4580 ↗

02context from an attestermember of a grouptx 38bd6a…4106 ↗

03REP credential checkP-256, under 2% of a tx · built, testedtx 43d46b…2372 ↗

04discount proof verifiedBN254 Groth16, 7.8% of a txtx 7ad074…9762 ↗

05no reusenullifier stored, a replay is refusedtx 7ad074…9762 ↗

06pay in the same transactionUSDC via the asset contracttx 7ad074…9762 ↗

07no fees for the guestfresh payer, fee-bumped by BookerBobtx 2cad0d…d3d5 ↗

08agent checkout over UCPthe Shopify order carries the txtx 19254e…9a09 ↗

09one stay, one reviewproof verified, nullifier spenttx 86c019…29b8 ↗

Stellar testnet. Step 03 runs on an upgraded mirror of the live contract today and goes live with the next contract upgrade.

What the engine powers

One primitive, many places.

live

Hotels

Proven reviews and returning-guest rates, without a loyalty account.

live

Shops over UCP

An agent checks out at a real Shopify store and claims your perks.

live

Cafés and restaurants

Regulars get recognised without being known.

live

Cross-merchant networks

A guest of one place is a known guest at all of them.

live

Verified travelers

REP proves past stays from your own Airbnb or Booking account. BookerBob learns only yes.

live

Stellar wallet tiers

Your wallet's history earns a tier. Places see the tier, never the wallet.

live

Disputes

A guest can disclose one stay to an arbiter only, and the review gets a verified mark.

More attesters

World ID, more zkTLS sources, imports of existing merchant loyalty programs.

The stack

From a browser to a Stellar contract.

Who sees what

Private by default. Accountable when needed.

the placean order and a proven badge, not who

the publicproofs and reviews, never names or wallets

BookerBob"verified: yes", never your trips or spend

an attesterits own check, once, at join time

the arbiterone stay, only if you disclose it

nobodyyour secret. It never leaves your device.

Try it, read it

Everything is open.

live app repo ↗ contract on stellar.expert ↗ deck (PDF) ↗