chainverdict

Pay-per-call checks an AI agent runs before it moves money or trusts a counterparty.

CommunityOnlineNo sign-inGlobalFreeCan modify data

What it can do

  • Payment Info: Free. Explains how to call the paid tools on this server: the x402 protocol, the network and asset, the settlement address, and the price of every tool.
  • Token Verdict: Heuristic ERC-20 safety verdict on Base: bytecode risk capabilities, ownership, metadata, 0-100 score, hold/caution/avoid. $0.01 per call.
  • Wallet Dossier: Profile of a Base address: EOA vs contract, balance, activity band, flags. $0.01 per call.

What data it sees

Do you need an account

No: the server works without sign-in

Pay-per-call checks an AI agent runs before it moves money or trusts a counterparty. No API keys, no accounts, no signup. Each paid tool call settles in USDC on Base via the x402 protocol, straight from the agent's wallet ($0.001-$0.10 per call), through the Coinbase CDP facilitator, in about two seconds.

Start with the free payment_info tool. It costs nothing, explains how payment works, and lists the price of every other tool. A client without wallet support can still call it.

20 tools in five groups:

  • Free - payment_info: how to pay, what each tool costs, where payments settle.
  • On-chain safety - token safety verdicts (is this ERC-20 a scam, a honeypot, or safe to hold), wallet risk profiles, on-chain payment verification, canonical token checks on Base.
  • Finance validators - IBAN, VAT, BIC/SWIFT, LEI, ISIN: deterministic check-digit and format validation with enrichment.
  • Web security - TLS certificate checks, SPF/DMARC/DKIM email-spoofing posture, brand typosquat and homoglyph detection.
  • Base chain data - live gas oracle, block info, token supply, token activity, address portfolio.

Every response carries an evidence record - what was checked, against which sources, how fresh it is, and what the answer does not establish - and is Ed25519-signed. No LLM inference anywhere: every response is a deterministic computation or a live read of external state, so the same input returns the same answer forever.

These are informational signals. None is a compliance control, none discharges a legal obligation, and a valid signature proves a response came from this service unaltered - not that the answer is correct.

Docs: llms.txt - OpenAPI - Methodology - Verify a response - Full portfolio and price list - Website

Example prompts:

  • "What does this cost? Call payment_info."
  • "Get a token safety verdict for 0x... on Base."
  • "Profile the wallet 0x... before I pay it."
  • "Validate this IBAN and this VAT number."
  • "Is example.com's email spoofable? Check SPF/DMARC."
Server tool list (20)

Raw names from tools/list. Only developers need these.

payment_infoFree. Explains how to call the paid tools on this server: the x402 protocol, the network and asset, the settlement address, and the price of every tool.
token_verdictHeuristic ERC-20 safety verdict on Base: bytecode risk capabilities, ownership, metadata, 0-100 score, hold/caution/avoid. $0.01 per call.
wallet_dossierProfile of a Base address: EOA vs contract, balance, activity band, flags. $0.01 per call.
validate_ibanIBAN mod-97 checksum + country length rules. $0.001 per call.
validate_vatEU VAT format validation with deterministic checksums (DE, IT, LU, PL, SI). $0.001 per call.
validate_bicBIC/SWIFT structural validation and decomposition. $0.001 per call.
html_to_markdownConvert raw HTML to clean Markdown. $0.002 per call.
text_diffDiff two texts (lines/words/chars). $0.002 per call.
verify_paymentDecode ERC-20 transfers in a Base transaction: amounts, counterparties, confirmations. $0.02 per call.
verify_tokenIs this the real USDC/EURC/WETH/cbBTC/USDT on Base? Anti-phishing for stablecoin payments. $0.005 per call.
validate_leiLegal Entity Identifier checksum validation. $0.002 per call.
validate_isinSecurities identifier checksum validation. $0.001 per call.
security_emailLive DNS check of a domain's email authentication records. $0.01 per call.
security_tlsLive TLS handshake: cert validity, issuer, expiry countdown. $0.01 per call.
security_typosquatFlags homoglyph and edit-distance look-alikes of known brands (c0inbase, b1nance, etc.). $0.005 per call.
data_gasLive Base gas conditions: base fee, priority fees, congestion, est transfer cost. $0.002 per call.
data_blockLatest block number, timestamp, tx count, gas utilization. $0.001 per call.
data_token_supplyTotal/circulating/burned supply and burn percentage for an ERC-20 on Base. $0.003 per call.
data_token_activityRecent transfer count, volume, unique senders/receivers, activity level. $0.005 per call.
data_portfolioETH + canonical token balances (USDC/WETH/cbBTC/EURC) for an address. $0.004 per call.