{"uid":"cap_-QoG9xl1JaJZbChKJz5Mw","slug":"hars-zero-momentum-signal-654d829c","name":"HARS-Zero Momentum Signal","description":"Polymarket prediction-market intelligence for AI agents. Pay-per-call in USDC via x402 protocol. Multi-chain: Base + Solana.","url":"https://hars.cryptotavern.xyz/paid/momentum-signal?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"object","example":{"count":0,"markets":[]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_DKkuNVKXBFcft7whUy_6o","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns Polymarket prediction-market momentum signals, surfacing markets with notable activity or directional movement for AI agent consumption.","exampleAgentPrompt":"What prediction markets on Polymarket are showing the strongest momentum signals right now? Pull the latest from HARS-Zero and show me which markets are moving.","exampleUseCases":[{"title":"Crypto trader monitoring market shifts","prompt":"Which Polymarket prediction markets related to crypto are seeing the biggest momentum swings today? I want to know where the action is before I make any moves."},{"title":"Political analyst tracking election odds","prompt":"Show me all the Polymarket political markets that are showing strong directional movement right now — I'm watching for any sudden shifts in election or policy odds."},{"title":"Automated agent briefing on active markets","prompt":"Every morning, pull the top momentum signals from Polymarket via HARS-Zero and give me a brief summary of which markets are heating up so I can start my day informed."}],"resultDescription":"Returns a JSON object containing a count of matched markets and an array of market objects with momentum signal data sourced from Polymarket, indicating which prediction markets are experiencing notable activity or directional price movement.","failureModes":["Empty markets array (count: 0) when no markets match the filter or when Polymarket data is unavailable","Payment failure via x402 protocol if USDC balance is insufficient or wallet is not configured","Malformed properties filter input may result in no results or an error response","Potential stale data if Polymarket upstream feed is delayed"],"whenToPreferThis":"Choose this endpoint when you need real-time or near-real-time momentum intelligence specifically from Polymarket prediction markets, especially when building trading signals, briefing agents, or monitoring directional odds shifts. Prefer this over general Polymarket API queries when you want pre-computed momentum ranking rather than raw market data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T00:34:38.231Z","isFirstParty":false,"canonicalSlug":"hars-zero-momentum-signal-654d829c"}