{"uid":"cap_AhfIq9VakFw_NmNC4mZkU","slug":"hars-zero-signal-api-alpha-feed-ab530620","name":"HARS-Zero Signal API – Alpha Feed","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/premium/alpha-feed","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"object","example":{"count":0,"markets":[]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0017","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":"$0.8/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.8","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.8","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_PZGqQe6sNBHdtOXRHIdP4","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.8","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 intelligence data (active markets, signals) for AI agents, gated by pay-per-call USDC payment via x402 protocol.","exampleAgentPrompt":"Pull the latest alpha feed from HARS-Zero and show me which Polymarket prediction markets are currently most active — I want to see what markets are available right now.","exampleUseCases":[{"title":"AI trading agent market scan","prompt":"Check the HARS-Zero alpha feed and list all the currently open Polymarket markets so my trading agent can decide which ones to take a position on."},{"title":"Election outcome probability lookup","prompt":"Use HARS-Zero to pull the latest Polymarket signals — I want to know what the current markets are saying about the upcoming election outcomes."},{"title":"Crypto price prediction market monitor","prompt":"Fetch the HARS-Zero alpha feed and show me any Polymarket markets related to crypto prices so I can see what traders are predicting."}],"resultDescription":"Returns a JSON object containing a count of matching markets and an array of market objects from the Polymarket prediction platform. Each market entry includes signal and intelligence data relevant to AI agent decision-making. Empty arrays indicate no matching markets for the given filter.","failureModes":["402 Payment Required – x402 payment not included or insufficient USDC balance","Empty markets array – no markets match the provided filter properties","Invalid property filter schema – malformed input properties object","Network timeout – upstream Polymarket data unavailable","Rate limiting – too many calls in a short window"],"whenToPreferThis":"Choose this endpoint when an AI agent needs real-time Polymarket prediction-market intelligence and is capable of paying per-call in USDC via the x402 protocol. Prefer it over free alternatives when premium alpha signals are needed for automated trading or decision-making agents operating on Base or Solana chains.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:31:34.438Z","isFirstParty":false}