Grey Ridge Signals — x402 Data & Security API

Agent-native, pay-per-call data on Base mainnet (USDC via x402). No account, no API key — agents pay inline in USDC. Every endpoint returns HTTP 402 with a payment-required challenge (x402 v2, network eip155:8453 / Base, asset USDC) until a valid signed payment is provided. See /.well-known/x402 for the full machine-readable payment manifest and /mcp for MCP protocol access. Provider: Grey Ridge Signals Group LLC.

Skills

• Spot Token Prices
  Live spot token prices from DefiLlama — pass comma-separated CoinGecko ids, get price/change_24h/symbol/confidence/timestamp. Route: GET /crypto/prices. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.004. Free preview at GET /crypto/prices/preview. Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: crypto_prices).
  cryptopricesdefidata
• Cross-Venue Perp Funding Rates
  Cross-venue Hyperliquid+OKX+dYdX perp funding rates — top coins by 24h volume, per-venue funding + arb spread (bps), best long/short venue, premium/annualized signal, next_funding_ts, mark/oracle prices, open interest. Route: GET /crypto/funding. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.004. Free preview at GET /crypto/funding/preview. Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: crypto_funding).
  cryptofundingperpshyperliquidarbitragedata
• DeFi Lending & LP Yields
  Top DeFi lending/LP yields — project, chain, symbol, APY breakdown + 1d/7d/30d APY trend, IL risk, mu/sigma, DefiLlama stability forecast, TVL. Filter by project, chain, or stablecoin-only. Sort by TVL or risk-adjusted APY. Route: GET /defi/yields. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.001. Free preview at GET /defi/yields/preview. Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: defi_yields).
  defiyieldlendingapytvldata
• Polymarket Prediction Markets
  Live Polymarket prediction markets — question, outcomes, bestBid/bestAsk/spread, volume24hr/volume1wk, oneDayPriceChange, clobTokenIds, conditionId, category tags, liquidity, end date. Ranked by volume24hr; filter by keyword. Route: GET /pm/markets. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.005. Free preview at GET /pm/markets/preview. Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: pm_markets).
  prediction-marketspolymarketmarketscryptodata
• Base Mainnet On-Chain Reads
  Base mainnet blockchain data — block number, gas price (EIP-1559 base_fee/priority_fee + gas_price_usd), ETH balance (incl. balance_usd), ERC-20 token balance (with symbol/decimals), transaction details by hash, transaction receipt (full logs + L1 fee breakdown + l1_fee_usd/total_fee_usd), contract-code check (EIP-7702 delegated-EOA aware), and wallet bundle (balance + tx count + contract check in one call). Routes: GET /chain/block-number, /chain/gas-price, /chain/balance, /chain/token-balance, /chain/tx, /chain/receipt, /chain/code, /chain/wallet. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.001-$0.003 per call. Free previews at /chain/block-number/preview and /chain/gas-price/preview (full live data, no payment required). Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tools: chain_block_number, chain_gas_price, chain_balance, chain_token_balance, chain_tx, chain_wallet).
  rpcbaseonchainblockchaindata
• Token Security / Honeypot Detector
  ERC-20 token security analysis for Base mainnet — EIP-1967/1822 proxy + upgradeability detection, bytecode dispatcher scan for mint/pause/blacklist/fee-setter/ownership selectors, owner() renouncement check, and a live eth_call state-override simulation testing whether a synthetic wallet can actually transfer() the token. Real compute, not a thin data wrapper. Returns risk_score (0-100) + verdict (clear/review/block) + human-readable flags. Route: GET /chain/token-security. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.02. Free preview at GET /chain/token-security/preview (full analysis of Base WETH). Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: chain_token_security).
  securityrpcbaseonchaintokenhoneypotdata
• MCP Server Security Audit
  Security scan of a target MCP server — audits every advertised tool for prompt-injection / tool-poisoning / exfiltration / dangerous-capability / hidden-unicode (OWASP LLM01/LLM08). Returns structured findings + risk score (0-100) + verdict (clear/review/block) + risk summary. Route: GET /scan/mcp. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.10. Free preview at GET /scan/mcp/preview (counts + risk score; withholds detail). Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: scan_mcp_server).
  securitymcpauditprompt-injection
• Domain Enrichment & Tech-Risk Assessment
  Domain intelligence: firmographic + tech-stack enrichment with full subdomain enumeration via certificate-transparency logs (crt.sh, RDAP, DoH, HTTP fingerprint) + verdict based on domain age. Plus tech-stack fingerprint → CVE (NVD) + EPSS + CISA-KEV attack-surface risk + verdict (clear/review/block) for a domain. Routes: GET /enrich/domain, GET /enrich/tech-risk, GET /dns/:domain, GET /whois/:domain. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.01-$0.05 per call. Machine-readable payment manifest: /.well-known/x402.
  domainenrichmentsecuritycveriskdnswhoisdata

How to call

https://x402-data-api.sigrunner.workers.dev

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