# Services from vendsdk.com on Zero

> vendsdk.com serves 19 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/vendsdk.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/vendsdk.com/health.json

## Services

- [VendSDK TLS Certificate Inspector](https://www.zero.xyz/c/vendsdk-tls-certificate-inspector-b032eadc/llms.txt): $0.004/call via x402. Retrieves TLS peer certificate subject, issuer, expiry, and authorization status for a given public hostname
- [VendSDK SSRF-Safe HTTP GET Fetcher](https://www.zero.xyz/c/vendsdk-ssrf-safe-http-get-fetcher-7f6f5d2f/llms.txt): $0.004/call via x402. Performs a safe HTTP GET on any public HTTPS URL and returns the status code, response headers, and size-capped JSON or text body for agent use
- [VendSDK Base Network ETH & USDC Balance Lookup](https://www.zero.xyz/c/vendsdk-base-network-eth-usdc-balance-lookup-19ae1e90/llms.txt): $0.003/call via x402. Returns live ETH and USDC balances for any EVM address on the Base mainnet blockchain
- [VendSDK Crypto Spot Prices (CoinGecko)](https://www.zero.xyz/c/vendsdk-crypto-spot-prices-coingecko-44403549/llms.txt): $0.005/call via x402. Returns live USD spot prices for one or more crypto assets using the CoinGecko simple price API
- [VendSDK DNS Records Resolver (DoH)](https://www.zero.xyz/c/vendsdk-dns-records-resolver-doh-208b9abd/llms.txt): $0.004/call via x402. Resolves multiple DNS record types (A, AAAA, MX, TXT, NS, CNAME) for a given hostname in a single DoH-based API call
- [VendSDK Bundle Outbound — Email + IP + HTTP HEAD](https://www.zero.xyz/c/vendsdk-bundle-outbound-email-ip-http-head-289185ed/llms.txt): $0.01/call via x402. Validates an email address (format/MX), geolocates an IP, and performs an SSRF-safe HTTP HEAD probe in a single API call for lead-gen and fraud detection agents.
- [VendSDK Domain Intelligence Bundle](https://www.zero.xyz/c/vendsdk-domain-intelligence-bundle-c319487c/llms.txt): $0.015/call via x402. Runs DNS lookup, TLS certificate check, RDAP/WHOIS query, and HTTP HEAD probe for a domain in a single paid call, returning a unified security and brand-protection report.
- [VendSDK IP Geolocation Lookup](https://www.zero.xyz/c/vendsdk-ip-geolocation-lookup-af7e7ea2/llms.txt): $0.003/call via x402. Returns country, city, organization, and ASN for a given IPv4 or IPv6 address for fraud detection and routing decisions
- [Kronos-Mini OHLCV Candle Forecast](https://www.zero.xyz/c/kronos-mini-ohlcv-candle-forecast-ecda9490/llms.txt): $0.05/call via x402. Returns OHLCV K-line candlestick forecasts for BTCUSDT or ETHUSDT using the Kronos-mini financial time-series foundation model
- [VendSDK FX Rate](https://www.zero.xyz/c/vendsdk-fx-rate-cf9510fb/llms.txt): $0.003/call via x402. Returns live fiat foreign exchange rates for a given base currency against specified target currencies, using Frankfurter/ECB as primary source with open.er-api as fallback
- [VendSDK HTTP HEAD Probe](https://www.zero.xyz/c/vendsdk-http-head-probe-99a3fc6c/llms.txt): $0.002/call via x402. Checks the public status, latency, and response headers of a given HTTPS URL via an HTTP HEAD request for uptime and health monitoring
- [VendSDK Fetch Text — Web Page to Plain Text](https://www.zero.xyz/c/vendsdk-fetch-text-web-page-to-plain-text-02f30486/llms.txt): $0.005/call via x402. Fetches a public URL and returns its content as stripped plain text, with title and truncation metadata, for use in research, RAG pipelines, and summarization agents
- [vendsdk.com DNS-over-HTTPS A/AAAA Resolver](https://www.zero.xyz/c/vendsdk-com-dns-over-https-a-aaaa-resolver-5b20896e/llms.txt): $0.003/call via x402. Resolves A (IPv4) and AAAA (IPv6) DNS records for a public hostname using DNS-over-HTTPS with a 60-second cache
- [vendsdk.com Email Validator](https://www.zero.xyz/c/vendsdk-com-email-validator-c1490b60/llms.txt): $0.004/call via x402. Validates an email address by checking format syntax, disposable-domain heuristics, and live DNS MX records via DNS-over-HTTPS
- [VendSDK WHOIS Lite — Domain Registration Lookup via RDAP](https://www.zero.xyz/c/vendsdk-whois-lite-domain-registration-lookup-via-rdap-30bc0991/llms.txt): $0.008/call via x402. Returns domain registration status, registrar name, registration/expiry dates, and nameservers for a given domain using RDAP (lightweight field set)
- [VendSDK QR Code Generator](https://www.zero.xyz/c/vendsdk-qr-code-generator-60b25d99/llms.txt): $0.002/call via x402. Generates a PNG QR code image URL by encoding an arbitrary payload string (e.g. payment or onboarding data) at a configurable pixel size
- [VendSDK Weather — Current Temperature & Wind by City](https://www.zero.xyz/c/vendsdk-weather-current-temperature-wind-by-city-7a849450/llms.txt): $0.003/call via x402. Returns current temperature and wind conditions for a specified city using live Open-Meteo forecast data
- [VendSDK Bundle Infra — DNS + HTTP HEAD + TLS Probe](https://www.zero.xyz/c/vendsdk-bundle-infra-dns-http-head-tls-probe-9ee6eb19/llms.txt): $0.01/call via x402. Runs a bundled infrastructure check combining DNS A/AAAA resolution, HTTP HEAD probe, and TLS certificate peek for a given hostname or URL in a single paid call.
- [vendsdk.com Redirect Chain Tracer](https://www.zero.xyz/c/vendsdk-com-redirect-chain-tracer-67398a88/llms.txt): $0.003/call via x402. Follows a public URL's redirect chain hop-by-hop, returning the HTTP status code at each step in an SSRF-safe manner

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

- [Zero catalog index](https://www.zero.xyz/llms.txt)