{"uid":"cap_EExnhJlu_2rfPjHj3v3Wx","slug":"aisa-mpp-data-apis-polymarket-batch-midpoint-prices-310869bb","name":"Polymarket Batch Midpoint Prices","description":"Retrieves midpoint prices for multiple token IDs using query parameters. The midpoint is calculated as the average of the best bid and best ask prices.\n\n<!-- aisa-pricing:start -->\nPublished reference price: $0.012 USD per successful request. Account-specific pricing and final settlement may differ.\n<!-- aisa-pricing:end -->","url":"https://api.aisa.one/apis/v1/polymarket/midpoints?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"array","items":{"type":"object","required":["token_id"],"properties":{"side":{"enum":["BUY","SELL"],"type":"string","example":"BUY","description":"Order side (optional, not used for midpoint calculation)"},"token_id":{"type":"string","example":"0xabc123def456...","description":"Token ID (asset ID)"}}}},"responseSchema":{"type":"object","description":"Map of token ID to midpoint price","additionalProperties":{"type":"string"}},"example":null,"exampleRequest":null,"tags":["web-search","financial-data","prediction-markets","weather","travel","data","search"],"displayCostAmount":"0.012","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.012/call","primary":{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.012","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.012","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_jOf3IE0SlcA0EApVTI52b","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.012","costPer":"request","priority":0,"asset":"0x20C000000000000000000000b9537d11c60E8b50","unit":"request","depositMicros":null,"planRef":null}],"brandName":"AIsa MPP Data APIs","brandSlug":"aisa-mpp-data-apis-mpp","brandBaseUrl":"https://aisa.one","brandDocsUrl":null,"whatItDoes":"Retrieves midpoint prices (average of best bid and best ask) for multiple Polymarket token IDs in a single batch request","exampleAgentPrompt":"What are the current midpoint prices for these Polymarket tokens: 0xabc123def456, 0xdef789ghi012, and 0xjkl345mno678?","exampleUseCases":[{"title":"Portfolio fair-value snapshot","prompt":"I hold positions in three Polymarket contracts with token IDs 0xabc123, 0xdef456, and 0xghi789 — can you pull the current midpoint prices for all of them so I can see what they're worth right now?"},{"title":"Arbitrage spread detection","prompt":"I'm comparing prices across prediction market platforms. Fetch the midpoint prices for these five Polymarket tokens — 0xtoken1, 0xtoken2, 0xtoken3, 0xtoken4, 0xtoken5 — so I can check if any are mispriced relative to other venues."},{"title":"Election market probability tracker","prompt":"I want to monitor the implied probabilities on a handful of election outcome tokens. Pull the midpoints for token IDs 0xelect001, 0xelect002, and 0xelect003 on Polymarket so I can see the current consensus probabilities."}],"resultDescription":"A JSON object mapping each submitted token ID to its midpoint price as a string, where midpoint = (best bid + best ask) / 2. Returns one entry per token ID submitted.","failureModes":["Invalid or non-existent token IDs return missing or zero values","Empty array input may return an empty object","Network timeout for large batches","Token IDs for inactive or delisted markets may return stale or missing prices","Malformed token ID strings may cause request rejection"],"whenToPreferThis":"Use this endpoint when you need midpoint prices for multiple Polymarket tokens simultaneously and want to minimize API calls. Prefer this over the single-token Midpoint endpoint when you have 2 or more tokens to price. Choose this over the Prices endpoint when you want a neutral fair-value reference (mid) rather than a directional bid or ask quote.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T06:54:28.262Z","isFirstParty":false,"canonicalSlug":"aisa-mpp-data-apis-polymarket-batch-midpoint-prices-310869bb"}