Creative Blockchain
🎨 Visual Art · brush preset exchange

Bristle · x402

A high-fidelity brush stroke marketplace where digital artists pay $0.01 USDC to instantly 'Dip' their stylus into premium preset libraries. Powered by HTS transfer, creators earn instantly per-stroke or per-download, transforming brushes from static assets into metered utility tools for professional workflows.

Hedera testnet + x402 paywall· x402 native
Section · Onchain

The primitive.

full primer →

Access to the brush preset exchange 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 primitiveBy shifting from a one-time purchase to a metered 'pay-per-unlock' or 'pay-per-usage' model, we capture the long-tail value of individual assets and allow for micro-licensing that didn't exist before.

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…
Hedera testnet HashScan ↗
Appendix · Market

Market sizing.

TAM
$3.8B
The global digital art software and creator economy asset market.
SAM
$420M
Professional digital illustrators and concept artists using tablet-based software.
SOM
$12M
Procreate and Photoshop power-users on Hedera utilizing HashPack-integrated marketplaces.

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

See also

Adjacent entries.

brush preset exchange
SketchSet Swap
Illustrators trade and license brush presets with zero gas fees and easy Google sign-in wallets.
art ownership tracking
HardTrace · x402
An on-chain verification layer where creators and galleries pay 0.01 USDC to append or verify high-fidelity provenance events. Trade paper trails for a micro-paid, immutable ledger of truth.
generative art minting
Gen-Seed · x402
A headless seed-to-string engine where 0.01 USDC triggers a unique generative iteration. Instead of a heavy upfront minting fee, users pay per 'Evolution Sign-off.' Artists deploy logic; collectors pay per high-fidelity render, receiving a Hedera transaction id as proof of unique generation. The payment is the shutter click.
gallery exhibition tracking
Exhibit · x402
Provenance is a living ledger, not a static database. Exhibit pays the artist 0.01 USDC every time a curator, insurer, or buyer pulls a verified exhibition history or updates a physical location tag. Turn the 'paper trail' into a real-time revenue stream for estates and digital creators.