Creative Blockchain
📷 Photography · color grading

Chromesthesia · Metered

A granular, high-fidelity color grading library for cinema and film. Instead of buying $100 preset packs, editors pay a micro-transaction to unlock the HEX-curve mapping of a specific frame. Professional-grade color science, metered by the pixel. Every unlock is a single 0.01 USDC payment behind an HTTP 402 gate — you pay for what you actually use.

x402 track · paid unlockMetered 402 gate· pay-per-unlock
Section · Onchain

The primitive.

full primer →

The valuable color grading operation sits behind an HTTP 402 that states its price before anyone signs, so photographers pay per unlock instead of per month.

Why this primitiveLoading details…

Kernel
an HTTP 402 challenge in front of exactly one valuable operation — an export, a render, a full-resolution download — where each unlock is a single USDC payment bound to its settlement tx
Drives the UI as
a locked panel that states its price before you sign, plus an 'unlocks bought / used' counter beside the released payload
Appendix · Secrets

Required keys.

METAMASK_PRIVATE_KEY
Deploys the QUIP verifier to your host chain. Fund on Sepolia via the Google Cloud faucet.
open ↗
SEPOLIA_RPC_URL
Host-chain HTTPS RPC endpoint. Any Sepolia provider works.
open ↗
ETHERSCAN_API_KEY
Required for npx hardhat verify after deploy.
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 build prompt…
Open in Lovable ↗Sepolia Etherscan ↗
Appendix · Market

Market sizing.

TAM
…
SAM
…
SOM
…

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. Ownership is sealed inside a post-quantum QUIP vault.
color grading
ChainColor Study
Save and share color grading presets onchain without spending gas or complex wallet setup. Every action is signed with a fresh WOTS+ one-time key.
color grading
ColorGrade Chain
Track and prove original photo color grades and presets on-chain. Every action is signed with a fresh WOTS+ one-time key.
royalty automation
SHUTTER · Metered
A headless licensing layer for digital imagery. Every 'GET' request triggers an EIP-3009 transfer directly to the photographer, enabling sub-cent licensing for AI training, social feeds, and micro-publishing. Every unlock is a single 0.01 USDC payment behind an HTTP 402 gate — you pay for what you actually use.