Rug Check (Base / x402)

On-chain token safety check for EVM tokens (Ethereum, BNB Chain, Base). Give a token address and chain, get a GO / CAUTION / DANGER verdict read directly from chain. Pay-per-call in USDC via the x402 protocol on Base. No API key, no signup.

For agents

Discovery: https://base-rugcheck.vercel.app/openapi.json · /llms.txt

POST https://base-rugcheck.vercel.app/api/rugcheck
Content-Type: application/json

{ "token": "0x...", "chain": "bnb", "mode": "auto" }

Price: $0.01 per call (USDC via x402 on base)

What it checks

ERC-20 validity (token vs wallet)
Upgradeable proxy (EIP-1967, beacon, OZ-legacy, UUPS)
Ownership renounced or owner in control
Mint capability in bytecode
LP burned percentage on main DEX pair
Liquidity depth (adaptive new vs mature scoring)

On-chain heuristic only. A GO means no on-chain red flags were found in the checks performed, not that the token is safe. Does not detect honeypots or holder concentration. Reputable centrally-controlled tokens may show CAUTION. Never the sole basis for a trade.