🎨 Visual Art · public mural collaboration

PixelWall · x402

Coordinate world-class public murals by enabling artists to claim physical grid coordinates via sub-cent micropayments. Each 0.01 USDC transaction locks a tile, triggers a localized task notification (e.g., 'Paint Prime Blue here'), and permanently anchors that stroke's metadata to the global map. Payments act as the consensus mechanism for space-time allocation on the wall.

Hedera testnet + x402 paywall· x402 native
Section · Onchain

The primitive.

full primer →

Access to the public mural collaboration 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 moving from 'free collaboration' to 'pay-per-claim', you eliminate sybil attacks on public space. The 0.01 USDC fee functions as a digital deposit for physical action, ensuring every artist 'skin in the game' for their specific coordinate.

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
$3.2B
Global outdoor advertising and public art installation market moving toward decentralized coordination.
SAM
$450M
The shared-economy creator market and urban street-art tech sector.
SOM
$12M
Onchain mural festivals and hyper-local collaborative street art commissions using Base.

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

See also

Adjacent entries.