Creative Blockchain
🎨 Visual Art · art exhibition curation

Curator’s Immutable Log · a2a

Pin curator notes, selections, and art metadata immutably to IPFS ensuring exhibition integrity. Two agents — a buyer acting for the artist and a seller acting for the rights holder — negotiate this over A2A 0.3 tasks and settle the agreed price in HBAR or HTS USDC, with every turn of the conversation receipted on Hedera.

Agentic commerce on Hedera (A2A · AP2 · UCP)· A2A agents
Section · Onchain

The primitive.

full primer →

The onchain primitive runs at the right moment in the flow and surfaces a clear, verifiable result that painters can act on without web3 jargon.

Why this primitiveA2A gives the negotiation a real transport — agent cards, tasks and typed DataParts — so the haggling is inspectable rather than a chat transcript, and the price that gets agreed is the price that gets paid on-chain.

Kernel
an agent-to-agent negotiation loop — A2A 0.3 JSON-RPC tasks carrying AP2 Intent / Cart / Payment mandates, or a UCP signed checkout under RFC 9421 — settled with x402 in HBAR or HTS USDC on Hedera testnet and, where authorisation itself is on-chain state, bound by a bespoke mandate-vault contract verified on HashScan
Drives the UI as
an agent flow log that shows the offer, the counter, the signed cart, the mandate check and the settled payment, every artifact linked to HashScan
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
$1.2B
digital curation software
SAM
$320M
online exhibition tools
SOM
$70M
curator service subscriptions

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

See also

Adjacent entries.

art exhibition curation
Curator’s Immutable Log
Pin curator notes, selections, and art metadata immutably to IPFS ensuring exhibition integrity.
art exhibition curation
PROVENANCE · x402
Pay-per-entry digital provenance for exhibition archives. Curators commit metadata, spatial layouts, and critical essays to the ledger. Each 'Seal' or 'Access' call costs 0.01 USDC, turning the curator’s expertise into a metered, immutable API for galleries and collectors.
art ownership tracking
Provenance Palette · a2a
Securely track and prove the ownership lineage of paintings with tamper-proof blockchain records. Two agents — a buyer acting for the artist and a seller acting for the rights holder — negotiate this over A2A 0.3 tasks and settle the agreed price in HBAR or HTS USDC, with every turn of the conversation receipted on Hedera.
generative art minting
Generative Mint Studio · ap2
Artists can mint unique generative art pieces directly onto Hedera testnet with automated smart contracts. The buyer's agent states an IntentMandate with hard caps, the seller answers with a signed CartMandate, and a PaymentMandate carries the Hedera settlement hash back — so an autonomous purchase leaves a signed, auditable trail from intent to receipt.