Proven on testnet

Open-source projects that show what CKB can do. Each one works on testnet. Read the code, try it with test CKB, and build on it.

Testnet only. These are not products: use test CKB from the faucet, never real assets.

CrowdCell
DeFi
All-or-nothing crowdfunding where on-chain scripts release each pledge to the creator or refund it to the backer.
Try on testnet Code
Grid3
DeFi
Tic-tac-toe for two players who stake CKB, with every move checked by an on-chain script.
Try on testnet Code
CKB PoP
DOBs · Dev Tools
Non-transferable badges on CKB for attending real-world events, plus a reusable presence module.
Try on testnet Code
Credora
DID · DOBs
Issue, hold and verify course certificates as Spore DOBs on CKB.
ActiveLast activity 2026-10-11
Try on testnet Code
ChainPress
Tools
Blog posts published on-chain with CKBFS, with edits kept as an append-only version history.
Try on testnet Code
Your proof hereAdd a project