# Services from x402-data-api.sigrunner.workers.dev on Zero

> x402-data-api.sigrunner.workers.dev serves 16 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-data-api.sigrunner.workers.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-data-api.sigrunner.workers.dev/health.json

## Services

- [Grey Ridge Signals — MCP Security Scanner (x402)](https://www.zero.xyz/c/grey-ridge-signals-mcp-security-scanner-x402-9d00fbee/llms.txt): $0.1/call via x402. Scans an MCP server URL for security vulnerabilities including tool-poisoning and hidden instructions, returning a risk score and categorized findings
- [Grey Ridge Signals — Tech Risk & Vulnerability Enrichment API](https://www.zero.xyz/c/grey-ridge-signals-tech-risk-vulnerability-enrichment-api-f99e099d/llms.txt): $0.05/call via x402. Returns a vulnerability risk summary for a website's detected tech stack, including CVEs, CVSS/EPSS scores, and a pass/review/fail verdict, paid per-call via x402 on Base.
- [Base Mainnet ETH Balance Lookup](https://www.zero.xyz/c/base-mainnet-eth-balance-lookup-17bb65be/llms.txt): $0.001/call via x402. Returns the ETH balance (in ETH and USD) for a given Base mainnet wallet address.
- [Base Mainnet Gas Price API](https://www.zero.xyz/c/base-mainnet-gas-price-api-e7d4487c/llms.txt): $0.001/call via x402. Returns current Base mainnet gas price in wei/gwei, EIP-1559 base fee and priority fee, and gas price in USD
- [x402-data-api DefiLlama Spot Token Prices](https://www.zero.xyz/c/x402-data-api-defillama-spot-token-prices-cdeefb79/llms.txt): $0.004/call via x402. Returns spot token prices from DefiLlama for up to 25 CoinGecko-identified tokens, including price, 24h change, symbol, confidence score, and timestamp.
- [x402-data-api DeFi Yields](https://www.zero.xyz/c/x402-data-api-defi-yields-5785b5c9/llms.txt): $0.001/call via x402. Returns top DeFi lending and LP pool yields with APY breakdowns, TVL, IL risk, and stability forecasts, filterable by project, chain, or stablecoin-only
- [Polymarket Live Markets API](https://www.zero.xyz/c/polymarket-live-markets-api-cff11c07/llms.txt): $0.005/call via x402. Returns live Polymarket prediction market data including questions, outcomes, prices, spreads, volume, and liquidity ranked by 24-hour volume with optional keyword filtering
- [Base Mainnet Contract Code Check](https://www.zero.xyz/c/base-mainnet-contract-code-check-4cbb02d1/llms.txt): $0.001/call via x402. Checks a Base mainnet address to determine if it is a contract, returns bytecode size, and detects EIP-7702 delegated EOA status.
- [Base Mainnet Transaction Receipt Lookup](https://www.zero.xyz/c/base-mainnet-transaction-receipt-lookup-ab3a8ef5/llms.txt): $0.001/call via x402. Fetches a full transaction receipt by hash on Base mainnet, including status, gas used, event logs, and L1 fee breakdown with USD cost estimates.
- [Base Mainnet ERC-20 Token Balance Lookup](https://www.zero.xyz/c/base-mainnet-erc-20-token-balance-lookup-88860933/llms.txt): $0.001/call via x402. Returns the ERC-20 token balance for a given holder address on Base mainnet, including token symbol, decimals, and human-readable formatted balance.
- [Grey Ridge Signals — Token Security Analyzer (Base)](https://www.zero.xyz/c/grey-ridge-signals-token-security-analyzer-base-17d1bb55/llms.txt): $0.02/call via x402. Returns a comprehensive security analysis of any ERC-20 token contract on Base mainnet, including risk flags, proxy details, ownership info, capabilities, and a honeypot simulation result.
- [x402-data-api Wallet Bundle (Base Mainnet)](https://www.zero.xyz/c/x402-data-api-wallet-bundle-base-mainnet-5bed10c0/llms.txt): $0.003/call via x402. Returns ETH balance, USD value, transaction count, and contract/EIP-7702 delegated-EOA status for a Base mainnet address in a single call.
- [x402-data-api Crypto Perp Funding Rates](https://www.zero.xyz/c/x402-data-api-crypto-perp-funding-rates-ad481ca4/llms.txt): $0.004/call via x402. Returns cross-venue perpetual futures funding rates, arbitrage spreads, and market data across Hyperliquid, OKX, and dYdX for top coins by 24h notional volume.
- [Grey Ridge Signals — Domain Enrichment API](https://www.zero.xyz/c/grey-ridge-signals-domain-enrichment-api-f35bafb6/llms.txt): $0.01/call via x402. Returns DNS records, SSL certificate details, organization info, detected tech stack, subdomains, and a threat verdict for a given domain name
- [Base Mainnet Transaction Details by Hash](https://www.zero.xyz/c/base-mainnet-transaction-details-by-hash-201241c4/llms.txt): $0.001/call via x402. Returns on-chain transaction details for a given transaction hash on Base mainnet.
- [Base Mainnet Current Block Number](https://www.zero.xyz/c/base-mainnet-current-block-number-27d6408e/llms.txt): $0.001/call via x402. Returns the current block number on the Base mainnet blockchain.

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)