One recorded run of an ad exchange inside an AI app

People ask an AI app what to buy. Advertiser agents decide whether to bid; code sets the price; the app shows one labelled Sponsored card, paid only after a signed delivery.

Watch the guided replay Step through opportunity 1

Jev: The judgment model each advertiser's agent uses to rate relevance and intent. It never names a price.
ContextHint: ContextHint is the intelligence platform for ChatGPT ads. It records real prompts and the ads seen beside them; agents get past examples and an inferred audience as evidence. contexthint.com
Hosted Solana sandbox: A private test network that runs Solana programs, used for this run. Test tokens only; not mainnet.

Demo AI app (the publisher)Recorded

cheapest hardware wallet that still supports ethereum and solana

Actual outputThe app's own answer, no advertiser material

I can’t reliably name the cheapest hardware wallet without checking current prices and Ethereum/Solana support. For a budget choice, compare entry-level hardware wallets by total delivered cost, then confirm that the exact model supports both networks through wallet software you’re comfortable using. Support may require separate companion apps; don’t assume every model from a brand supports the same chains. Hardware wallets keep signing keys isolated from your phone or computer, but cost money and add steps when connecting or approving transactions. Mobile/software wallets are usually free and more convenient, but keep keys on an internet-connected device, increasing exposure if it is compromised. Either type can still authorize a malicious transaction. If you’re holding only a small amount, a reputable software wallet may be a reasonable starting point. For larger or long-term holdings, prioritize verified support, security design and reliable recovery over the lowest price. Buy from the manufacturer or an authorized seller, initialize it yourself, and never use a supplied recovery phrase or share your own. Check shipping, taxes and required accessories before deciding which is cheapest.

SponsoredFictional advertiser

ClearVault is a fictional hardware wallet with offline key storage and declared Ethereum/Solana support. Straightforward self-custody guidance for people comparing hardware wallets.

ClearVaultclearvault.example

Opportunity 1 as the person saw it: the answer, then one disclosed card. ClearVault paid 0.004 USDC, charged only after the app signed its receipt.

Questions43 filled, 1 no fill

Agent decisions155 became bids in an auction

Top price0.004USDCLowest 0.003 USDC; 3 auctions won

Paid to the app0.010USDCTest USDC; 0.030 USDC refunded Sandbox transactions4For 3 paid deliveries

VerifyNot run yet48 checksNot run yet

Where a rule kept an agent out: opportunity 3

The same question was asked again. ClearVault's agent said bid, but ClearVault had already been placed twice in this session, so the frequency cap kept it out of the auction. KeyForge won at 0.003 USDC. In opportunities 1 and 2 the bids tied and a tie rule fixed in the exchange code decided. Open opportunity 3

Auctions

In story order. Select a row for the full pipeline.

Question	Eligible	Bids	Winner	Price, USDC	Outcome
1 Cheapest hardware wallet	2 of 3	2	ClearVault	0.004	Tie-break
2 Offline key storage	2 of 3	2	ClearVault	0.003	Tie-break
3 Same question again	1 of 3	1	KeyForge	0.003	Frequency cap
4 Mobile-only wallets	0 of 3	0	nobody	none	No fill

Why Solana

Small ads need payments that don't each touch the chain

An ad here costs 0.003 to 0.004 USDC. A payment channel locks a deposit once on Solana; each accepted delivery is a signed off-chain voucher; one close pays the publisher. ClearVault's channel: open, voucher 1 (0.004 in total), voucher 2 (0.007 in total), close.

This run had 3 paid deliveries over 2 channels, so channels cost about as many transactions (4) as deliveries here. Illustration, not from this run: a channel still needs only one open and one close for 100 deliveries.The same 3 receipts were also settled on Solana Devnet: ClearVault's channel (opens the Solana explorer), KeyForge's channel (opens the Solana explorer). All links

Run activity

Exchange clock, UTC. The 69 min idle gap is drawn as a break. Chain times are on Settlement, never on this axis.

Organic answers

Opportunities

Bids admitted

Winners picked

Paid deliveries

13:38 UTC13:47 UTC14:56 UTC15:00 UTC69 min

Organic answers4, 13:41 UTC to 13:42 UTC
Opportunities4, 13:47 UTC to 14:59 UTC
Bids admitted5, 14:57 UTC to 14:59 UTC
Winners picked3, 14:57 UTC to 14:59 UTC
Paid deliveries3, 14:57 UTC to 15:00 UTC

Campaigns

3 fictional advertisers

How they joined

Campaign	Status	Eligible	Bids	Wins	Spend vs cap, USDC	Refunded at close, USDC
ClearVault	Active, funded	2 of 4	2	2	0.007 of 0.008	0.013
KeyForge	Active, funded	3 of 4	3	1	0.003 of 0.008	0.017
LeatherGuard	Unfunded	0 of 4	0	0	0.000 of 0.008	no channel

Payment channels

Deposit, paid and refunded, test USDC on the hosted Solana sandbox

Settlement

ClearVault0.007 paid, 0.013 back, of 0.020 USDC

KeyForge0.003 paid, 0.017 back, of 0.020 USDC

Paid to the publisherRefunded

The recorded run settled on a hosted Solana sandbox; Devnet links are on Settlement. Test USDC, not real money. One disposable test payer funded every advertiser. Agent decisions by jev-1.13.0; organic answers by gpt-6.1-sol.