# Services from x402-checker.nock-for-mak.workers.dev on Zero

> x402-checker.nock-for-mak.workers.dev serves 41 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/x402-checker.nock-for-mak.workers.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-checker.nock-for-mak.workers.dev/health.json

## Services

- [x402 Checker — Paid Honesty Report (/report)](https://www.zero.xyz/c/x402-checker-paid-honesty-report-report-b822d647/llms.txt): $0.05/call via x402. Fetches a comprehensive x402 payment honesty report for a target URL, revealing payTo address, network, amount, risk flags, bytecode analysis, and OFAC/facilitator metadata — all without sending any payment headers to the target.
- [x402 Checker Wikipedia Lookup](https://www.zero.xyz/c/x402-checker-wikipedia-lookup-1813523d/llms.txt): $0.01/call via x402. Fetches a Wikipedia article summary or search results by query or page title, returning the extract, description, and attribution metadata
- [x402 Checker — OFAC SDN Sanctions Screen](https://www.zero.xyz/c/x402-checker-ofac-sdn-sanctions-screen-36273256/llms.txt): $0.01/call via x402. Screens an EVM or Solana cryptocurrency address against the OFAC SDN (Specially Designated Nationals) list and returns a CLEAR or HIT verdict
- [x402 Checker — Batch URL 402 Probe](https://www.zero.xyz/c/x402-checker-batch-url-402-probe-f74de976/llms.txt): $0.01/call via x402. Checks up to 10 URLs in one call to detect x402 payment-gating, extract payment details, and surface risk flags before any USDC is spent.
- [x402 Checker FX Currency Converter](https://www.zero.xyz/c/x402-checker-fx-currency-converter-c47abbb3/llms.txt): $0.01/call via x402. Converts a specified amount from one ISO-4217 currency to one or more target currencies using ECB reference rates via Frankfurter
- [x402 Checker Agent Name Registration](https://www.zero.xyz/c/x402-checker-agent-name-registration-b9b126d2/llms.txt): $0.05/call via x402. Registers an ENS-style agent name (30-day TTL) linked to an x402-capable origin URL for $0.05 USDC on Base
- [x402 Checker – EVM Function Signature Lookup (/sig)](https://www.zero.xyz/c/x402-checker-evm-function-signature-lookup-sig-b7a8471c/llms.txt): $0.01/call via x402. Resolves a 4-byte EVM function selector (or calldata prefix) to its human-readable ABI signature using the Openchain database
- [Polymarket Markets Lookup via x402 Checker](https://www.zero.xyz/c/polymarket-markets-lookup-via-x402-checker-98e0c05b/llms.txt): $0.01/call via x402. Fetches live prediction market data from Polymarket by keyword search or exact slug, returning market questions, odds, and 24h volume
- [x402 Checker — Email Syntax & MX Validation](https://www.zero.xyz/c/x402-checker-email-syntax-mx-validation-2d3bae1e/llms.txt): $0.01/call via x402. Validates an email address by checking syntax and MX records via DNS-over-HTTPS, returning validity, reason, and MX host list
- [x402 Checker – /quote Stock & Asset Quote Lookup](https://www.zero.xyz/c/x402-checker-quote-stock-asset-quote-lookup-852d02e5/llms.txt): $0.01/call via x402. Returns real-time or delayed price, change, and metadata for equities, indices, FX pairs, and crypto via Yahoo Finance — paid at $0.01 USDC per call over x402.
- [x402 Checker ENS/Basename Resolver](https://www.zero.xyz/c/x402-checker-ens-basename-resolver-96708f71/llms.txt): $0.01/call via x402. Resolves an ENS or Basename (.eth, .base.eth) name to its on-chain Ethereum address via public HTTP lookup
- [x402 Checker – Hacker News Search (/hn)](https://www.zero.xyz/c/x402-checker-hacker-news-search-hn-3057fc94/llms.txt): $0.01/call via x402. Searches Hacker News stories, comments, jobs, and polls via Algolia and returns ranked results for a given query
- [x402 Checker – Fear & Greed Index (/fng)](https://www.zero.xyz/c/x402-checker-fear-greed-index-fng-841c3ba4/llms.txt): $0.01/call via x402. Returns the current or historical Crypto Fear & Greed Index value, classification, and timestamp sourced from alternative.me
- [x402 Checker – ERC-20 Token Lookup (GET /token)](https://www.zero.xyz/c/x402-checker-erc-20-token-lookup-get-token-0e79ffde/llms.txt): $0.01/call via x402. Looks up metadata for an ERC-20 token contract on Base by its contract address, returning name, symbol, decimals, and contract status.
- [x402 Checker – Token Security Check (/tsec)](https://www.zero.xyz/c/x402-checker-token-security-check-tsec-eb7bb0e0/llms.txt): $0.01/call via x402. Checks a token contract address for honeypot risk, buy/sell taxes, and liquidity data using honeypot.is and DexScreener data sources.
- [x402 Checker – Block Info](https://www.zero.xyz/c/x402-checker-block-info-083fdec3/llms.txt): $0.01/call via x402. Fetches Base blockchain block data (number, transaction count, network info) by block tag, number, or hash
- [x402 Checker – Cron Expression Parser](https://www.zero.xyz/c/x402-checker-cron-expression-parser-e16648b3/llms.txt): $0.01/call via x402. Parses a Unix crontab expression and returns the next N fire times in both UTC and a specified local timezone
- [x402 Checker – /geo Geocoding](https://www.zero.xyz/c/x402-checker-geo-geocoding-eda08e65/llms.txt): $0.01/call via x402. Forward and reverse geocoding: convert a place name to lat/lon coordinates, or convert lat/lon to a place name
- [x402 Checker — DNS/RDAP/TLS Domain Dossier](https://www.zero.xyz/c/x402-checker-dns-rdap-tls-domain-dossier-873a5129/llms.txt): $0.01/call via x402. Returns a comprehensive DNS, RDAP registration, and TLS certificate dossier for a given public hostname
- [x402 Checker Weather (/wx)](https://www.zero.xyz/c/x402-checker-weather-wx-90dc15dc/llms.txt): $0.01/call via x402. Returns current weather conditions for a place by name or coordinates, sourced from Open-Meteo, in metric or US units.
- [x402 Checker SSL Certificate Lookup](https://www.zero.xyz/c/x402-checker-ssl-certificate-lookup-60fc15e1/llms.txt): $0.01/call via x402. Retrieves TLS certificate facts from public Certificate Transparency logs (crt.sh) and performs a live HTTPS HEAD check for a given hostname
- [x402 Checker — Raw HTTP Header Dump](https://www.zero.xyz/c/x402-checker-raw-http-header-dump-7ee4066b/llms.txt): $0.01/call via x402. Fetches a public URL and returns its HTTP response status code and response headers, without sending any payment headers.
- [x402 Checker – /price Crypto Price Lookup](https://www.zero.xyz/c/x402-checker-price-crypto-price-lookup-60cd9067/llms.txt): $0.01/call via x402. Returns current USD prices for up to 8 cryptocurrency symbols or Base ERC-20 tokens, sourced from DefiLlama/CoinGecko, paid via x402 micropayment.
- [x402 Checker – arXiv Paper Search](https://www.zero.xyz/c/x402-checker-arxiv-paper-search-44d49139/llms.txt): $0.01/call via x402. Search arXiv preprints by keyword, category, or paper ID and return structured metadata for up to 8 results
- [x402 Checker — JSON Schema Validator](https://www.zero.xyz/c/x402-checker-json-schema-validator-c60b011f/llms.txt): $0.01/call via x402. Validates a JSON data instance against a provided JSON Schema, returning validity status and any errors
- [x402 Checker — US Federal Business Days Calculator](https://www.zero.xyz/c/x402-checker-us-federal-business-days-calculator-5c13f787/llms.txt): $0.01/call via x402. Returns whether a given date (or date range) is a US federal business day, including holiday name, next business day, and timezone-aware weekend labeling, for 2025–2027.
- [x402 Checker – GitHub Repository & User Search (/gh)](https://www.zero.xyz/c/x402-checker-github-repository-user-search-gh-50df284a/llms.txt): $0.01/call via x402. Searches or retrieves GitHub repository and user metadata (stars, description, language, last updated) via a pay-per-call x402 endpoint.
- [x402 Checker — EVM Address Lookup on Base](https://www.zero.xyz/c/x402-checker-evm-address-lookup-on-base-f60edc14/llms.txt): $0.01/call via x402. Looks up an EVM address on Base (eip155:8453) via public RPC, returning isContract status, ETH balance, USDC balance, and transaction count
- [x402 Checker – IANA Timezone Lookup (/tz)](https://www.zero.xyz/c/x402-checker-iana-timezone-lookup-tz-8dc48d7c/llms.txt): $0.01/call via x402. Returns the current local time, UTC offset, DST status, and abbreviation for any IANA timezone name
- [x402 Checker - Base Gas Price Lookup](https://www.zero.xyz/c/x402-checker-base-gas-price-lookup-3d09f6d2/llms.txt): $0.01/call via x402. Returns current gas price data for the Base blockchain network including base fee, priority fee, and suggested max fee in Gwei.
- [x402 Checker CVE Lookup](https://www.zero.xyz/c/x402-checker-cve-lookup-60a37f6d/llms.txt): $0.01/call via x402. Searches the NIST NVD CVE database by CVE ID or keyword, returning vulnerability details including severity, CVSS score, CWEs, and summary
- [x402 Checker – Base Transaction Lookup (/tx)](https://www.zero.xyz/c/x402-checker-base-transaction-lookup-tx-0e7cbedf/llms.txt): $0.01/call via x402. Looks up a transaction on the Base blockchain by hash and returns its status, chain, and network details.
- [x402 Checker DEX Token Lookup](https://www.zero.xyz/c/x402-checker-dex-token-lookup-7c4a6692/llms.txt): $0.01/call via x402. Looks up DEX trading pairs and token price/liquidity data by token contract address or search query, powered by DexScreener
- [x402 Checker — Markdown Fetch via /md](https://www.zero.xyz/c/x402-checker-markdown-fetch-via-md-a98d6d01/llms.txt): $0.01/call via x402. Fetches a public URL and returns its content converted to Markdown, along with HTTP metadata
- [x402 Checker – Current Time (UTC)](https://www.zero.xyz/c/x402-checker-current-time-utc-0ddb6ddc/llms.txt): $0.01/call via x402. Returns the current UTC timestamp in multiple formats (milliseconds, ISO 8601, Unix epoch) along with operator and timezone metadata.
- [x402 Checker – URL Redirect Chain Unwrapper](https://www.zero.xyz/c/x402-checker-url-redirect-chain-unwrapper-65e76a91/llms.txt): $0.01/call via x402. Follows and returns the full HTTP redirect chain for a given URL, revealing each hop's status code, location header, and content type up to the final destination.
- [x402 Checker – Stack Overflow Search (/so)](https://www.zero.xyz/c/x402-checker-stack-overflow-search-so-b5efa4cf/llms.txt): $0.01/call via x402. Searches Stack Overflow for questions and answers matching a query or question ID, returning ranked results via the Stack Exchange API.
- [x402 Checker /find — Tool Search](https://www.zero.xyz/c/x402-checker-find-tool-search-2e4f632d/llms.txt): $0.01/call via x402. Searches the x402-checker platform's catalog of free and paid tools by keyword, returning ranked matching endpoints with their URLs, methods, and prices.
- [x402 Checker – Crypto News Feed](https://www.zero.xyz/c/x402-checker-crypto-news-feed-4f50a626/llms.txt): $0.001/call via x402. Returns a summarized recap of recent public crypto headlines from CoinDesk, The Block, Decrypt, and Base Blog, optionally filtered by topic.
- [x402 Checker – POST /bid (Paid Ranking Bid)](https://www.zero.xyz/c/x402-checker-post-bid-paid-ranking-bid-ad3492ca/llms.txt): $0.05/call via x402. Submit a $0.05 USDC bid to boost a URL's ranking on the x402 Checker leaderboard for 24 hours
- [x402 Checker /now — Current UTC Timestamp](https://www.zero.xyz/c/x402-checker-now-current-utc-timestamp-547da9f2/llms.txt): $0.01/call via x402. Returns the current UTC timestamp in multiple formats (milliseconds, ISO 8601, Unix epoch) along with operator metadata.

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

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