# On-Chain Checker evolves into FOC testing tool after OpenSea testnet shutdown

Source: https://xcancel.com/tokenfox1/status/1948832282170863952
Kiwi News: https://news.kiwistand.com/stories/On-Chain-Checker-evolves-into-FOC-testing-tool-after-OpenSea-testnet-shutdown?index=0x68848b1fa4c4a330fd768b61fdc075683a8f5e9f22142afae9b8e8948bc69ce31d55f34e
Submitted by misha on 2025-07-26 UTC, 6 upvotes, 0 comments

With OpenSea shutting down testnets, I’m evolving On-Chain Checker into a serious FOC testing powerhouse

OCC is now gloriously picky - flagging even the tiniest flaws in your on-chain tokens

Full breakdown 🧵