If I buy this on Arc, can I get out? We answer by really buying the token and selling it straight back inside one eth_call, through the pool's hook, with nothing spent. What the round trip costs is what you would lose.
Free, one token at a time, twenty a minute. Bulk (25 at once, worst first) is /api/x402/arc-exit-check-bulk, $0.10 in USDC on Arc, USDC on Solana or XNT. Every USDC paid goes to the faucet pot and the APEX vault. Pools opened in the last 24 hours are known by token address; older ones by pool id or full key. Probe contract: ArcExitProbe.sol. New pools and who sniped them: Arc Sniper Watch.