{"name":"Grey Ridge Signals — x402 Data & Security API","description":"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.","url":"https://x402-data-api.sigrunner.workers.dev","provider":{"name":"Grey Ridge Signals Group LLC","url":"https://x402-data-api.sigrunner.workers.dev"},"version":"1.0.0","documentationUrl":"https://x402-data-api.sigrunner.workers.dev","capabilities":{"streaming":false,"pushNotifications":false},"defaultInputModes":["application/json"],"defaultOutputModes":["application/json"],"skills":[{"id":"crypto-prices","name":"Spot Token Prices","description":"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: $0.001. Free preview at GET /crypto/prices/preview. Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: crypto_prices).","tags":["crypto","prices","defi","data"],"examples":["GET /crypto/prices?coins=bitcoin,ethereum,solana"]},{"id":"funding-rates","name":"Cross-Venue Perp Funding Rates","description":"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: $0.001. Free preview at GET /crypto/funding/preview. Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: crypto_funding).","tags":["crypto","funding","perps","hyperliquid","arbitrage","data"],"examples":["GET /crypto/funding?limit=20"]},{"id":"defi-yields","name":"DeFi Lending & LP Yields","description":"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).","tags":["defi","yield","lending","apy","tvl","data"],"examples":["GET /defi/yields?limit=20&project=aave-v3&chain=Ethereum"]},{"id":"polymarket-markets","name":"Polymarket Prediction Markets","description":"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).","tags":["prediction-markets","polymarket","markets","crypto","data"],"examples":["GET /pm/markets?query=bitcoin&limit=20"]},{"id":"base-chain-reads","name":"Base Mainnet On-Chain Reads","description":"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).","tags":["rpc","base","onchain","blockchain","data"],"examples":["GET /chain/gas-price","GET /chain/balance?address=0x4200000000000000000000000000000000000006","GET /chain/wallet?address=0x4200000000000000000000000000000000000006"]},{"id":"token-security","name":"Token Security / Honeypot Detector","description":"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).","tags":["security","rpc","base","onchain","token","honeypot","data"],"examples":["GET /chain/token-security?token=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"]},{"id":"mcp-security-scan","name":"MCP Server Security Audit","description":"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).","tags":["security","mcp","audit","prompt-injection"],"examples":["GET /scan/mcp?url=https://example.com/mcp"]},{"id":"domain-enrichment","name":"Domain Enrichment & Tech-Risk Assessment","description":"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.","tags":["domain","enrichment","security","cve","risk","dns","whois","data"],"examples":["GET /enrich/domain?domain=example.com","GET /enrich/tech-risk?domain=example.com","GET /dns/example.com","GET /whois/example.com"]}]}