🎨 Visual Art · AI-assisted painting

BrushBot · x402

$0.01 — Stroke-by-stroke autonomy. BrushBot meters every AI-assisted refinement, texture layer, and brush stroke as a discrete HTS transfer micro-settlement. Stop paying for monthly SaaS subscriptions you don't use; pay only for the exact latency and compute consumed by your digital canvas. High-fidelity diffusion calls are gated by instant the embedded wallet-signed auth, turning the act of painting into a real-time stream of provenance-backed micro-transactions.

Hedera testnet + x402 paywall· x402 native
Section · Onchain

The primitive.

full primer →

Access to the AI-assisted painting 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 AI art tools suffer from 'subscription fatigue' or credit systems that obfuscate cost. x402 allows for granular, per-stroke billing, ensuring creators only pay for the specific AI interventions they trigger while providing immediate onchain proof of work for every layer added to the piece.

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
$4.5B
The global digital art and automated image synthesis market, increasingly dominated by per-inference billing models.
SAM
$850M
The projected market for AI-integrated creative design software and API-driven generative toolkits.
SOM
$12M
Early adopters in the Base ecosystem and digital fine artists transitioning from flat subscriptions to metered, high-frequency tool usage.

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

See also

Adjacent entries.