{"uid":"cap_82WD5DX518gma1m8b-SYM","slug":"grey-ridge-signals-chainlink-usd-price-feed-base-436b6208","name":"Grey Ridge Signals — Chainlink USD Price Feed (Base)","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/link-usd?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"chain":"base","price_usd":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_lK5gwMSDgOdIDP1xGnWe7","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 the current USD price of a token on Base mainnet via Chainlink price feed data, used as part of a pre-trade token-safety gate for Base trading agents.","exampleAgentPrompt":"Before I trade, look up the current Chainlink USD price for this Base mainnet token so I can use it as part of a pre-trade safety check.","exampleUseCases":[{"title":"Pre-trade price validation for DeFi bot","prompt":"I'm about to swap some tokens on Base — can you fetch the current Chainlink USD price for this ERC-20 address so my trading agent can confirm the price looks reasonable before executing?"},{"title":"Token valuation in portfolio tracker","prompt":"I want to know the current USD value of a Base mainnet token I hold — pull the live Chainlink price feed data for it so I can calculate my position size."},{"title":"On-chain price sanity check before approval","prompt":"Before I approve this DeFi transaction on Base, grab the Chainlink USD price for the token involved so I can verify the price isn't manipulated or wildly off-market."}],"resultDescription":"Returns a JSON object containing the chain name (e.g. 'base') and the current USD price of the queried token as reported by Chainlink's on-chain price feed (e.g. {\"chain\":\"base\",\"price_usd\":12.5}). The response provides a real-time oracle price suitable for pre-trade validation and position sizing in DeFi trading agents.","failureModes":["No Chainlink feed available for the requested token — returns an error or null price","Invalid or unsupported token address — endpoint may return an error response","Payment not settled via x402 — request blocked with 402 Payment Required","Network latency or Cloudflare Workers timeout causing delayed or failed response","Token address on wrong chain — data returned may be incorrect or missing"],"whenToPreferThis":"Choose this endpoint when you need a fast, trustless, on-chain USD price for a Base ERC-20 token with no API key or account setup required, billed inline via x402 micropayments. It is particularly well-suited for AI trading agents that need Chainlink oracle prices as part of a broader pre-trade safety workflow on Base mainnet. Prefer it over centralized price APIs when on-chain data provenance matters.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T07:43:10.283Z","isFirstParty":false,"canonicalSlug":"grey-ridge-signals-chainlink-usd-price-feed-base-436b6208"}