www.0816.cn x402 offerings

Upgradeable contract and proxy admin check for any EVM contract on Base (GET ?contract=0x… or POST body {contract}). Reads EIP-1967 implementation, admin and beacon slots directly from chain state. Returns whether the contract can be upgraded, who controls the upgrade, and an upgrade risk verdict. Call when an agent needs to know if a contract owner can silently change its logic. $0.02 USDC

Token safety pre-flight — one verdict before your agent buys, swaps or approves any ERC-20 on Base (GET ?contract=0x… or POST body {contract}). Call it right before the trade and branch on `verdict`: ALLOW / WARN / BLOCK, with `action`: PROCEED / REVIEW / ABORT and a one-line `reason`. Aggregates honeypot and scam-token detection, buy tax and sell tax, transfer restrictions, hidden mint and owner privileges, and EIP-1967 proxy upgrade risk into a single decision. `checks` carries the raw fields for audit. $0.10 USDC

Token tax check and transfer restriction scan for any ERC-20 on Base (GET ?contract=0x… or POST body {contract}). Returns buy tax, sell tax, transfer limits, cooldown rules, blacklist/whitelist functions and a trade-safety verdict. Call before any agent swaps, quotes or routes a token, to avoid tokens that eat most of the trade in fees. $0.02 USDC

Token rug risk score for any ERC-20 on Base (GET ?contract=0x… or POST body {contract}). Returns honeypot detection, token tax check, LP lock status, hidden mint, owner renounced, and a rug risk score 0-100. Call before any agent buys, swaps or approves a token. Also detects scam token patterns. $0.02 USDC

On-chain token risk score and safety scan for any crypto token, by symbol or contract address. Returns 8 weighted dimensions — holder concentration, top-1 holder identity, holder income share vs protocol revenue, price percentile over 366 days, P/TVL and P/S, supply integrity and mint/freeze authority, DEX+CEX exit liquidity, and multi-wallet clustering / wash-trading detection — each with its raw evidence, plus a confidence score for what could not be verified. Call before buying, adding liquidity, or approving a contract. Also matches: token risk, token safety, token score, token scan, token scanner, due diligence, rug check, honeypot, scam token check, contract safety, holder concentration, whale concentration, wash trading, pre-trade safety check, memecoin safety. $0.02 USDC per call.