{"uid":"cap_mjisG4DgM8OgIzQZepnID","slug":"data-selling-api-53234eff36dc-herokuapp-com-97dc85fe","name":"Polymarket Market Side Volumes API","description":"","url":"https://data-selling-api-53234eff36dc.herokuapp.com/v1/polymarket/market-side-volumes","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001000","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.001000/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_L6n6RPbTQyQFuVKnG546B","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 buy and sell side volume data for a specified Polymarket prediction market","exampleAgentPrompt":"What are the current buy-side and sell-side volumes for the Polymarket market with ID 0x1234abcd? I want to understand whether there's a directional imbalance in trading activity.","exampleUseCases":null,"resultDescription":"A breakdown of buy-side and sell-side trading volumes for the specified Polymarket market, allowing comparison of directional activity and potential market imbalances.","failureModes":["Invalid or unknown market ID returns an error or empty result","Network timeout if Polymarket data is unavailable","Payment failure (402) if x402 micropayment is not properly attached","Malformed POST body returns a 400 bad request"],"whenToPreferThis":"Use this endpoint when you need directional volume data (buy vs. sell) for a specific Polymarket prediction market, particularly for analyzing market sentiment, liquidity imbalance, or trading flow. Prefer this over generic market APIs when working specifically with Polymarket data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:36:51.905Z","isFirstParty":false}