floflo777 / open-crypto-puzzles

Unsolved crypto puzzles worth ~10 BTC, ~12 ETH and ~1,900 AR still on-chain: escrow addresses, author clues, and my research on each. A few solved, with payout proofs.

zeemscript / Parallax

Per-issue USDC bounties for open-source work, escrowed on Stellar and paid the moment your pull request merges.

Stellar-Clear / clearledger-contracts

Soroban smart contracts on Stellar for invoice finance: participant registry, invoice lifecycle, USDC liquidity pools, and escrow coordination.

hhh7666 / receipt-protocol

Minimal Ed25519-signed activity receipts for verifiable AI agents — self-attested, offline-verifiable, no blockchain.

evolvent-ai / VibeLifeBench

🗓️ The hardest life-admin benchmark for agents — lawsuits, escrow shortfalls, apartment hunts, exams. 20 long-horizon tasks × 20–30 stages across 10 domains and 21 services, scored by 1247 atomic checks that read backend state, not prose. Bilingual zh/en. Current 20 tasks are relatively easy.

Cryptoxiaoxiang / cardlane

Bilingual gift card marketplace with encrypted delivery, onchain escrow, 24-hour appeal replies and 48-hour settlement on Base Sepolia.