presign-guard

Free: the green/orange/red verdict only, for a transaction, token approval, EIP-712 signature, XRP Ledger transaction (type xrpl) or Algorand transaction (type algorand) your agent is about to sign. Limited to 10 calls per hour. For the reason codes and details use presign_check ($0.01); for a plain-language explanation presign_check_explain ($0.03).

Free: the green/orange/red verdict and grade only, for a Solana or EVM token your agent is about to buy, hold or accept. Limited to 10 free calls per hour (shared with presign_quick_check). For the reasons, one-line summary and market data use token_verdict ($0.01).

Paid ($0.01 USDC via x402 on Base or Solana): call this before you sign. Send the transaction, token approval or EIP-712 signature (Permit, Permit2, EIP-3009 x402 payment, Seaport) your agent is about to sign; get back green, orange or red with reason codes: who gets access, whether the spender or recipient is flagged, sanctioned (OFAC SDN) or unverified, unlimited allowances, and the token itself

Paid ($0.03 USDC via x402 on Base or Solana): the same verdict and reason codes as presign_check, plus a 3 to 5 sentence plain-language explanation a person can read before approving (lang en or nl). Same as POST /v1/check/explain. The answer carries a signed receipt (EIP-191, bound to your arguments) that proves later which verdict you got.

Paid ($0.01 USDC via x402 on Base or Solana): call this before your agent buys, holds or accepts a token. Send the chain (solana, base, ethereum, arbitrum, optimism, polygon, bsc, xrpl, algorand) and the token address, mint, CURRENCY.rIssuer or Algorand asset id; get back green/orange/red, a grade (SAFE, CAUTION, RISKY, AVOID), reason codes (mint or freeze authority still active, honeypot, tax or

Paid ($0.02 USDC via x402 on Base or Solana): audit the open token approvals of a wallet on an EVM chain (base, ethereum, arbitrum, optimism, polygon, bsc) or on Solana, for example your agent's own wallet as a periodic check. Get back green/orange/red, a grade, a one-line summary and every approval with its spender. EVM, every ERC-20 allowance: flagged malicious (red), a plain wallet, on a doubt

Paid ($0.01 USDC via x402 on Base or Solana): call this before your agent pays an address, or before accepting money from one. Send any chain's wallet address (EVM 0x..., Solana, Tron, Bitcoin, XRP Ledger, Algorand, or another currency OFAC lists). Get back green/orange/red: red SANCTIONED_ADDRESS with the SDN entry (name, programs, currency) when the address is on the OFAC SDN list, red or orange

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