Free crypto tools
Free crypto safety and gas tools
Check gas on 7 chains, find and revoke risky token approvals, scan a token for rug-pull powers, test a link against 460,000+ phishing domains and convert crypto units. No sign-up, no wallet connection needed to check, no tracking.
Gas trackerLive gas prices on Ethereum, Base, Arbitrum, Optimism, Polygon, BNB Chain and Avalanche, with the dollar cost of a…Token approval checkerSee which contracts can spend your tokens and NFTs on Ethereum, Base, Arbitrum and 4 more chains. Flags unlimited and…Token safety checkerFree token scanner for Solana and 7 EVM chains: honeypot, buy and sell tax, mint and freeze authority, hidden owner,…Crypto unit converterConvert wei to gwei to ETH, lamports to SOL and sats to BTC with exact integer maths, plus live USD, EUR and GBP…Phishing link checkerCheck a link against 460,000+ known crypto phishing and wallet-drainer domains from MetaMask and ScamSniffer, plus…
Need a different coin or chain? Swap crypto without an account: BTC, ETH, SOL, USDT and 1,000+ more.
For developers and AI agents
The same data as a pay-per-call API
Chain Check serves approvals, phishing checks, token risk, contract scans, wallet reports and gas over x402. Pay a fraction of a cent in USDC on Base per call, with no account or API key.