{"uid":"cap_vvv-l9bA8en5sqxeF5iMg","slug":"grey-ridge-signals-crypto-price-feed-base-chain-x402-3504a2ff","name":"Grey Ridge Signals — Crypto Price Feed (Base Chain, x402)","description":"Pay-per-call market & on-chain data for Base trading agents over x402: live DeFi yields, cross-venue funding rates, token prices, Polymarket and RPC data — plus a pre-trade token-safety gate (GO/HOLD/BLOCK). No account, no API key; agents pay inline in USDC from $0.001/call.","url":"https://x402-data-api.sigrunner.workers.dev/chain/prices?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"chain":"base","prices":{"BTC":100000.5,"ETH":3500.1,"SOL":104.2,"LINK":12.5}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_lc0Bmntet8a-8Edpjpq4_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns real-time spot prices for major crypto assets (BTC, ETH, SOL, LINK, etc.) on Base chain, settled inline via x402 micropayment at $0.005 USDC per call.","exampleAgentPrompt":"What are the current prices of BTC, ETH, SOL, and LINK on Base right now — I need live spot prices for my trading bot with no API key setup?","exampleUseCases":[{"title":"Live price check for trading bot","prompt":"Pull the current spot prices for ETH and BTC on Base so my agent can decide whether to execute a trade right now."},{"title":"DeFi portfolio valuation","prompt":"Fetch today's live prices for SOL, ETH, and LINK on Base so I can calculate the current USD value of my DeFi portfolio."},{"title":"Price alert baseline","prompt":"Get me the current price of ETH on Base chain — I want to set a baseline so my agent can alert me if it drops more than 5%."}],"resultDescription":"A JSON object containing the chain name ('base') and a prices map keyed by asset symbol (e.g. BTC, ETH, SOL, LINK) with their current USD spot prices as floats. Example: {chain: 'base', prices: {BTC: 100000.5, ETH: 3500.1, SOL: 104.2, LINK: 12.5}}.","failureModes":["Payment not received or x402 handshake fails — endpoint returns 402 Payment Required","Invalid or unsupported asset symbol — may return empty price entry or error","Network/worker timeout — Cloudflare worker may return 503 under load","Stale price data if upstream oracle is lagging — no explicit freshness guarantee in schema"],"whenToPreferThis":"Choose this endpoint when your agent needs real-time crypto spot prices on Base chain with zero account setup or API key — ideal for autonomous trading bots, DeFi agents, or portfolio tools that can settle micropayments inline via x402. Prefer over free-tier APIs when you need guaranteed pay-per-call access without rate-limit concerns or key management overhead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T07:05:48.896Z","isFirstParty":false,"canonicalSlug":"grey-ridge-signals-crypto-price-feed-base-chain-x402-3504a2ff"}