Creative Blockchain
📷 Photography · color grading

ChromaPass · x402

Professional colorists and mobile photographers pay 0.01 USDC to unlock cinema-grade LUTs and RAW grading profiles. Instead of monthly subscriptions, you pay per export. Creators earn instant USDC for every frame their style processes. A high-fidelity marketplace where every 'Apply' is a micro-settlement.

Hedera testnet + x402 paywall· x402 native
Section · Onchain

The primitive.

full primer →

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

Why this primitiveThe legacy model of buying $50 preset packs is dead. x402 enables a 'pay-per-look' economy that lowers the barrier for hobbyists while providing continuous, metered revenue for professional colorists.

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
$2.1B
Total global expenditure on post-production visual effects and color services.
SAM
$450M
The market for premium image editing software and mobile filter assets.
SOM
$18M
Targeted reach of enthusiast mobile photographers and Base-native creative agents.

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

See also

Adjacent entries.

color grading
ColorChain Palette
Save and share color grading presets and images as permanent IPFS assets for consistent workflow.
color grading
ChainColor Study
Save and share color grading presets onchain without spending gas or complex wallet setup.
color grading
ColorGrade Chain
Track and prove original photo color grades and presets on-chain.
copyright registry
Snapshot Proof · x402
A high-frequency copyright layer for the screenshot era. 0.01 USDC per EIP-712 signature to timestamp image hashes on Hedera. Creators meter every license issuance, and platforms pay to verify provenance in real-time. No subscriptions, just provable ownership on-demand.