🎨 Visual Art · auction facilitation

Gavel · x402

A high-frequency auction engine where bidding isn't just a gesture, but a micro-transactional commitment. Bidders authorize $0.01 USDC per bid via x402, eliminating gas volatility while ensuring 'skin in the game.' Artists receive real-time streaming settlement as the hammer price climbs. Built for 1-of-1 digital artifacts and physical-linked NFTs where every interaction contributes to the final bounty.

Hedera testnet + x402 paywall· x402 native
Section · Onchain

The primitive.

full primer →

Access to the auction facilitation engine is metered with x402: 0.01 HBAR or 0.01 HTS USDC per call, paid from the embedded wallet, so painters — or the agents working for them — pay per query and get a HashScan receipt every time.

Why this primitiveTraditional auctions suffer from high barrier-to-entry (gas) or 'ghost bidding.' By making every bid a $0.01 HTS transfer payment, we create a high-velocity, low-friction environment where human and AI bidders compete in real-time without signing complex pop-ups or holding ETH.

Kernel
an x402 v2 paywall metering access at 0.01 HBAR or 0.01 HTS USDC (token 0.0.429274) per call, paid from the embedded wallet through the relay and verified by a self-hosted facilitator against the Hedera mirror node
Drives the UI as
a 'pay 0.01 HBAR or USDC to unlock' button with a live flow log and a HashScan link for every settlement
Appendix · Secrets

Required keys.

HEDERA_OPERATOR_ID
Hedera testnet account id (0.0.xxxxxx). Create and fund it free.
open ↗
HEDERA_OPERATOR_KEY
ECDSA private key for that account, from the Hedera portal dashboard.
open ↗
REOWN_PROJECT_ID
Free project id powering the HashPack pairing modal.
open ↗
HEDERA_RPC_URL
Optional. JSON-RPC relay, defaults to the public Hashio endpoint.
open ↗
PINATA_JWT
Pins images / JSON / manifests to IPFS.
open ↗

Add these in your Lovable project under Settings → Secrets before pasting the prompt below.

Appendix · Mega-prompt

The build prompt.

Paste into a fresh Lovable project. Make sure all five secrets above are set first. read the build strategy →

Loading the mega-prompt…
Appendix · Market

Market sizing.

TAM
$67B
The global art market transitioning to verifiable, high-frequency digital exchange.
SAM
$420M
Digital art collectors and DAOs using L2-native auction platforms.
SOM
$12M
Emerging visual artists using HashPack-based gallery tools on Hedera.

Indicative figures for hackathon pitches — refine with your own research before raising.

See also

Adjacent entries.