{ "x402Version": 2, "id": 1361, "slug": "1361", "resource": "https://api.polym.uk/screener", "description": "Ranked Polymarket market-flow screener with factual concentration and liquidity-compatibility fields for the observed window. BEFORE YOU PAY: free substitute https://dash.polym.uk/markets.json. THIS ADDS: Little today, and we would rather you knew: the free snapshot has every field this route returns, for the whole decomposed set instead of the 40 rows this caps at, and it also carries the dominant-flow wallet that this route omits. Buy only if a small fixed-shape response beats completeness.", "type": "http", "accepts": [ { "scheme": "exact", "network": "eip155:8453", "payTo": "0x7b13107779CfDA1bEba3289d0Fbe27310436f3E3", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "amount": "50000", "maxTimeoutSeconds": 300 } ], "outputSchema": { "bazaar": { "info": { "input": { "method": "GET", "queryParams": { "top": 20 }, "type": "http" }, "output": { "example": { "asOf": "2026-09-01T03:42:26.765Z", "caveats": [ "SHOWCASE, NOT THE PAID RESPONSE: what you see is one ranked row of the screener. markets is cut to 1 of the 8 rows this response carried. Nothing is masked or invented: every value is a dated measurement, kept so you can read the shape, the units and the field semantics. The schema published beside it is complete; a paid call returns the complete set.", "STATIC CONTRACT SAMPLE: what GET /screener?top=8 returns for the free public snapshot of 2026-09-01T03:42Z, restricted to the markets the seller's own flag reported open, then frozen. It is not current market intelligence: a live response carries its own asOf and current values, and GET /coverage is free and reports how many markets are decomposed right now.", "Descriptive FACT for the observed window. Never an accusation of fraud, nor a wash or skill label.", "apparentVolumeUsd counts executed trades, which is not the same as liquidity or open interest. It is taker-side and window-scoped, not lifetime.", "Concentration is measured among the OBSERVED TAKERS (the tape is taker-only). effectiveTraders = 1/HHI, which exposes what distinctTraders hides.", "onchainCounterparties is how many distinct counterparties the dominant taker traded against: a FACT, not a wash verdict. The proxy wallet is not the owner, and the graph is one hop deep.", "betResolvedInFavor means the dominant direction coincided with the resolution. One sample; neither PnL nor evidence of skill.", "resolutionRisk is the category BASE RATE, not a forecast for this market: dispute (how often markets like this are disputed at UMA) by flip (when disputed, how often the outcome REVERSES). On-chain fact; a small cell is directional only." ], "decomposed": 93, "markets": [ { "apparentVolumeUsd": 287740.83, "apparentVsBookFlag": null, "bucket": "broad", "conditionId": "0xeef04a24987593cf21397c2ee92b8e82a58d43e2e5f7dde9bd3ebddda8377dbf", "effectiveTraders": 11, "marketClosed": false, "resolution": { "category": "Sports", "categoryDisputeRatePct": 0.4, "categoryFlipRatePct": 31.9, "titleLooksUncheckable": false }, "title": "Monterrey Open: Diane Parry vs Elise Mertens", "topTraderShare": 0.2214 } ], "observedMarkets": 42605, "windowHours": 71.95 }, "type": "json" } }, "schema": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "input": { "additionalProperties": false, "properties": { "method": { "enum": [ "GET" ], "type": "string" }, "queryParams": { "additionalProperties": false, "properties": { "top": { "default": 20, "maximum": 40, "minimum": 1, "type": "integer" } }, "type": "object" }, "type": { "const": "http", "type": "string" } }, "required": [ "type", "method" ], "type": "object" }, "output": { "properties": { "example": { "additionalProperties": false, "properties": { "asOf": { "format": "date-time", "type": "string" }, "caveats": { "items": { "type": "string" }, "type": "array" }, "decomposed": { "minimum": 0, "type": "integer" }, "markets": { "items": { "additionalProperties": false, "properties": { "apparentVolumeUsd": { "description": "Observed taker-side volume in the materialized window, in USD.", "minimum": 0, "type": "number" }, "apparentVsBookFlag": { "description": "Whether observed volume is structurally inconsistent with available book liquidity.", "type": [ "boolean", "null" ] }, "bucket": { "description": "Descriptive taker-flow structure bucket, not a fraud verdict.", "enum": [ "unranked", "structurally-thin", "concentrated", "moderate", "broad" ], "type": "string" }, "conditionId": { "description": "Polymarket condition ID.", "pattern": "^0x[0-9a-fA-F]{64}$", "type": "string" }, "effectiveTraders": { "description": "HHI-derived effective trader count for the observed taker flow.", "minimum": 0, "type": "integer" }, "marketClosed": { "description": "Whether the market was closed in the artifact.", "type": [ "boolean", "null" ] }, "resolution": { "additionalProperties": false, "properties": { "category": { "description": "Heuristic category inferred from the market title.", "type": "string" }, "categoryDisputeRatePct": { "maximum": 100, "minimum": 0, "type": [ "number", "null" ] }, "categoryFlipRatePct": { "maximum": 100, "minimum": 0, "type": [ "number", "null" ] }, "titleLooksUncheckable": { "description": "True when the market TITLE states no checkable threshold (price, number, score, head-to-head). Read from the title only — the resolution rules are not read.", "type": "boolean" } }, "required": [ "category", "categoryDisputeRatePct", "categoryFlipRatePct", "titleLooksUncheckable" ], "type": [ "object", "null" ] }, "title": { "description": "Observed Polymarket market title.", "type": "string" }, "topTraderShare": { "description": "Share of observed taker volume attributed to the top trader.", "maximum": 1, "minimum": 0, "type": "number" } }, "required": [ "conditionId", "title", "bucket", "apparentVolumeUsd", "topTraderShare", "effectiveTraders", "apparentVsBookFlag", "marketClosed", "resolution" ], "type": "object" }, "type": "array" }, "observedMarkets": { "minimum": 0, "type": "integer" }, "windowHours": { "minimum": 0, "type": "number" } }, "required": [ "asOf", "windowHours", "observedMarkets", "decomposed", "markets", "caveats" ], "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" } }, "required": [ "input" ], "type": "object" } } }, "tags": [ "bazaar" ], "sourceHost": "api.polym.uk", "lastUpdated": "2026-09-16T18:09:34.714Z", "quality": { "calls30d": 6, "uniquePayers30d": 2, "lastCalledAt": "2026-09-16T18:09:33.554Z" }, "liveness": {}, "verified": false, "featured": false, "provider": { "host": "api.polym.uk", "manifest_name": "api.polym.uk", "source": "cdp-mirror", "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources", "submitted_at": "2026-09-18T22:00:31.484Z" } }