{"uid":"cap_fP_wjzKCKgDZ9F6BHaXWn","slug":"nullclear-market-feed-5e09fff7","name":"NullClear Market Feed","description":"Non-custodial deferred clearing, deep invariant validation, and reputation protocol for x402 AI Agents on Base Mainnet","url":"https://api.nullclear.dev/v1/sandbox/market-feed?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"asset":{"type":"string","default":"ETH","example":"ETH"}}},"responseSchema":{"type":"json","example":{"asset":"ETH/USDC","price":2645.5,"source":"NullClear Verified Feed","timestamp":1729045678901}},"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_1lEELM88WiUJH18EFVYKz","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 a verified real-time spot price for a given crypto asset (e.g. ETH) via the NullClear non-custodial protocol on Base Mainnet","exampleAgentPrompt":"What's the current verified spot price of ETH right now — pull it from NullClear's market feed?","exampleUseCases":[{"title":"Real-time ETH price for DeFi bot","prompt":"What's ETH trading at right now? I need the verified spot price with a timestamp for my automated trading logic."},{"title":"Pre-trade price check for agent","prompt":"Before executing this swap, fetch the current ETH/USDC price from a verified source so I can confirm the rate looks right."},{"title":"Price monitoring alert system","prompt":"Grab the latest verified ETH price from NullClear and let me know if it's moved more than 5% from the last value you fetched."}],"resultDescription":"A JSON object containing the asset trading pair (e.g. 'ETH/USDC'), the current spot price as a float, the named price source ('NullClear Verified Feed'), and a millisecond-precision Unix timestamp of when the price was recorded.","failureModes":["Invalid or unsupported asset symbol returns an error or empty result","Payment failure (x402 micropayment not completed) results in 402 response blocking data","Network or API downtime returns a 5xx error with no price data","Stale price if upstream feed is delayed — timestamp should be checked by the caller"],"whenToPreferThis":"Choose this endpoint when your agent needs a cryptographically sourced, source-attributed spot price for a crypto asset — particularly within x402-compatible workflows on Base Mainnet where trust, auditability, and non-custodial guarantees matter. Prefer it over generic price APIs when you need a verifiable source label and millisecond timestamp alongside the price.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T00:31:00.651Z","isFirstParty":false,"canonicalSlug":"nullclear-market-feed-5e09fff7"}