# Services from chainverdict.xyz on Zero

> chainverdict.xyz serves 39 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/chainverdict.xyz
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/chainverdict.xyz/health.json

## Services

- [ChainVerdict Wallet Dossier](https://www.zero.xyz/c/chainverdict-wallet-dossier-9738f925/llms.txt): $0.01/call via x402. Returns a behavioral profile of a Base address — EOA or contract type, first/last seen timestamps, transaction and counterparty counts, contract verification status, and any raised flags.
- [ChainVerdict Preflight Payment Screening](https://www.zero.xyz/c/chainverdict-preflight-payment-screening-f9945d12/llms.txt): $0.01/call via x402. Screens a Base/EVM address before sending USDC by combining OFAC SDN sanctions checking with on-chain address profiling, returning a clear_to_pay / caution / do_not_pay verdict with evidence.
- [ChainVerdict ERC-20 Token Safety Verdict](https://www.zero.xyz/c/chainverdict-erc-20-token-safety-verdict-ad1b017a/llms.txt): $0.01/call via x402. Returns a hold/caution/avoid safety verdict with a risk score and detailed signals for an ERC-20 token on Base, covering ownership, mint authority, proxy upgradeability, liquidity, and transfer restrictions.
- [chainverdict.xyz Email Authentication Posture Check](https://www.zero.xyz/c/chainverdict-xyz-email-authentication-posture-check-c90849ed/llms.txt): $0.01/call via x402. Checks a domain's email authentication configuration by querying live DNS for SPF record and policy, DMARC policy and alignment, and DKIM selector presence.
- [chainverdict.xyz LEI Structural Validator](https://www.zero.xyz/c/chainverdict-xyz-lei-structural-validator-a16e1360/llms.txt): $0.002/call via x402. Validates a Legal Entity Identifier (LEI) string against ISO 17442 structural rules: 20-character length, allowed character set, and mod-97 check digits — without querying the GLEIF registry.
- [ChainVerdict Payment Verification](https://www.zero.xyz/c/chainverdict-payment-verification-9764b81e/llms.txt): $0.02/call via x402. Verifies a Base blockchain transaction by checking its confirmation depth, success/revert status, transferred value, token type, sender, and recipient address.
- [ChainVerdict TLS Certificate Probe](https://www.zero.xyz/c/chainverdict-tls-certificate-probe-ee490365/llms.txt): $0.01/call via x402. Performs a live TLS probe on a hostname and returns certificate validity, expiry, issuer, chain completeness, protocol version, and cipher suite in real time.
- [ChainVerdict ERC-20 Supply Lookup](https://www.zero.xyz/c/chainverdict-erc-20-supply-lookup-ebfe3491/llms.txt): $0.003/call via x402. Returns total and circulating supply for an ERC-20 token on Base, with decimals applied and block height included, read live from chain.
- [ChainVerdict ERC-20 Activity Monitor](https://www.zero.xyz/c/chainverdict-erc-20-activity-monitor-88e490b4/llms.txt): $0.005/call via x402. Returns recent transfer count and volume for an ERC-20 token on Base, enabling agents to judge whether the token is actively used.
- [chainverdict.xyz HTML-to-Markdown Converter](https://www.zero.xyz/c/chainverdict-xyz-html-to-markdown-converter-2488d619/llms.txt): $0.002/call via x402. Converts an HTML document to clean, LLM-ready Markdown by stripping scripts, styles, and navigation chrome while preserving headings, lists, tables, and links.
- [ChainVerdict Token Verification](https://www.zero.xyz/c/chainverdict-token-verification-ec02adf9/llms.txt): $0.005/call via x402. Resolves a token symbol or contract address to the canonical Base contract, detecting lookalike and impostor contracts that share a symbol.
- [chainverdict.xyz Document Diff](https://www.zero.xyz/c/chainverdict-xyz-document-diff-ee2546a3/llms.txt): $0.002/call via x402. Computes a structured per-line diff of two text blocks, returning additions, deletions, changes, and an identical flag to detect document changes.
- [ChainVerdict Typosquat Domain Analysis](https://www.zero.xyz/c/chainverdict-typosquat-domain-analysis-c93edd30/llms.txt): $0.005/call via x402. Analyzes a domain name for brand impersonation patterns including homoglyph substitution, character insertion/omission, TLD swaps, and proximity to known brands, returning a suspicion verdict with matched patterns.
- [BIC/SWIFT Code Structural Validator](https://www.zero.xyz/c/bic-swift-code-structural-validator-a7fdd93d/llms.txt): $0.001/call via x402. Validates a BIC/SWIFT code for structural compliance with ISO 9362, checking character count, bank code, country code, location code, and optional branch code segments.
- [ChainVerdict Base Gas Conditions](https://www.zero.xyz/c/chainverdict-base-gas-conditions-81ac6d02/llms.txt): $0.002/call via x402. Returns current Base network gas conditions — base fee and priority fee in gwei — at the latest block height, to help agents decide whether to transact now or wait.
- [ChainVerdict Portfolio Balance Lookup](https://www.zero.xyz/c/chainverdict-portfolio-balance-lookup-400efadf/llms.txt): $0.004/call via x402. Returns native ETH and ERC-20 token balances for a given Base address in a single call, read live from chain at a specified block height.
- [ChainVerdict IBAN Validator](https://www.zero.xyz/c/chainverdict-iban-validator-3ddd93d2/llms.txt): $0.001/call via x402. Validates an IBAN structurally using country-specific length rules, character set checks, and the ISO 7064 mod-97 checksum algorithm
- [ChainVerdict ISIN Validator](https://www.zero.xyz/c/chainverdict-isin-validator-b0b716e7/llms.txt): $0.001/call via x402. Validates a 12-character ISIN against ISO 6166 structural rules: country prefix, 9-character NSIN format, and Luhn check digit.
- [ChainVerdict OFAC SDN Address Screener](https://www.zero.xyz/c/chainverdict-ofac-sdn-address-screener-899d9af6/llms.txt): $0.001/call via x402. Checks a single EVM wallet address against the US OFAC SDN digital-currency address list and returns a signed match/no-match result for $0.001 per call
- [chainverdict.xyz EU VAT Number Format Validator](https://www.zero.xyz/c/chainverdict-xyz-eu-vat-number-format-validator-975f5bb9/llms.txt): $0.001/call via x402. Validates the structure and check digits of an EU VAT number by country-specific rules, without performing a live VIES registry lookup.
- [ChainVerdict OFAC SDN Address Screener](https://www.zero.xyz/c/chainverdict-ofac-sdn-address-screener-958e63f5/llms.txt): $0.001/call via x402. Screens an EVM blockchain address against the OFAC Specially Designated Nationals (SDN) list for sanctions compliance
- [ChainVerdict Base Block Info](https://www.zero.xyz/c/chainverdict-base-block-info-8c845bd6/llms.txt): $0.001/call via x402. Returns the latest Base blockchain block number, timestamp, and hash — primarily useful as a liveness and connectivity check.
- [ChainVerdict Batch Financial Identifier Validator](https://www.zero.xyz/c/chainverdict-batch-financial-identifier-validator-da8c7736/llms.txt): $0.1/call via x402. Validates up to 500 mixed financial identifiers (IBAN, VAT, BIC, LEI, ISIN) in a single batch call for reconciliation and onboarding workflows.
- [ChainVerdict Typosquatting Detection API](https://www.zero.xyz/c/chainverdict-typosquatting-detection-api-217f4051/llms.txt): $0.005/call via x402. Analyzes a domain name to detect brand impersonation and typosquatting attempts
- [ChainVerdict Email Security DNS Check API](https://www.zero.xyz/c/chainverdict-email-security-dns-check-api-b1a786d9/llms.txt): $0.01/call via x402. Checks a domain's email security DNS records (SPF, DMARC, DKIM) to assess its email authentication posture
- [ChainVerdict BIC/SWIFT Validation API](https://www.zero.xyz/c/chainverdict-bic-swift-validation-api-3b54df3e/llms.txt): $0.001/call via x402. Validates an 8 or 11 character BIC/SWIFT code to confirm it is a legitimate bank identifier
- [ChainVerdict VAT Number Validator](https://www.zero.xyz/c/chainverdict-vat-number-validator-3304b792/llms.txt): $0.001/call via x402. Validates a European Union VAT number (including country prefix) and returns its validity status
- [ChainVerdict IBAN Validator](https://www.zero.xyz/c/chainverdict-iban-validator-ab1f51d7/llms.txt): $0.001/call via x402. Validates an IBAN (International Bank Account Number) and returns its validity status and parsed components
- [ChainVerdict LEI Validation API](https://www.zero.xyz/c/chainverdict-lei-validation-api-e7000c80/llms.txt): $0.002/call via x402. Validates a Legal Entity Identifier (LEI) code and returns verification data about the associated legal entity
- [ChainVerdict Preflight Address Check API](https://www.zero.xyz/c/chainverdict-preflight-address-check-api-9aa0f30c/llms.txt): $0.01/call via x402. Checks a blockchain payee address before sending funds to assess trustworthiness or risk
- [ChainVerdict Wallet Dossier API](https://www.zero.xyz/c/chainverdict-wallet-dossier-api-858908c3/llms.txt): $0.01/call via x402. Retrieves a comprehensive on-chain dossier (profile, risk assessment, and activity summary) for a given blockchain wallet address (EOA or contract).
- [ChainVerdict ISIN Validator](https://www.zero.xyz/c/chainverdict-isin-validator-b4a1860d/llms.txt): $0.001/call via x402. Validates a 12-character ISIN (ISO 6166 securities identifier) and returns validation results for that instrument
- [ChainVerdict TLS Security Probe](https://www.zero.xyz/c/chainverdict-tls-security-probe-a5f9813c/llms.txt): $0.01/call via x402. Probes a given hostname over TLS to assess its security posture and certificate configuration
- [ChainVerdict Token Verdict API](https://www.zero.xyz/c/chainverdict-token-verdict-api-c779659c/llms.txt): $0.01/call via x402. Returns a verdict or risk assessment for an ERC-20 token contract on the Base blockchain given its address
- [ChainVerdict Token Verification API](https://www.zero.xyz/c/chainverdict-token-verification-api-5f45deff/llms.txt): $0.005/call via x402. Verifies and returns verdict/analysis for a blockchain token by contract address or symbol
- [ChainVerdict Token Supply API](https://www.zero.xyz/c/chainverdict-token-supply-api-46e8f4d9/llms.txt): $0.003/call via x402. Fetches the circulating or total supply data for an ERC-20 token by its contract address on Base
- [ChainVerdict Portfolio Data API](https://www.zero.xyz/c/chainverdict-portfolio-data-api-c4958702/llms.txt): $0.004/call via x402. Retrieves on-chain portfolio and token balance data for a given blockchain address
- [ChainVerdict Payment Verification API](https://www.zero.xyz/c/chainverdict-payment-verification-api-e356c584/llms.txt): $0.02/call via x402. Verifies whether a blockchain transaction constitutes a valid payment for a given transaction hash
- [ChainVerdict Token Activity API](https://www.zero.xyz/c/chainverdict-token-activity-api-83fec5e5/llms.txt): $0.005/call via x402. Returns on-chain activity data for a given ERC-20 token contract address on the Base blockchain

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

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