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DripMetrics Polymarket VPIN Flow-Toxicity Scorer
x402
DripMetrics Polymarket VPIN Flow-Toxicity Scorer is a paid API for AI agents from api.dripmetrics.ai, paid per call via x402, $0.050000/call, status unknown (last checked 2026-09-13).
Computes a VPIN (Volume-synchronized Probability of Informed Trading) flow-toxicity score for a Polymarket prediction market by bucketing YES/NO trade pressure into equal-notional buckets over a requested time window.
Price / call$0.050000
Success—
StatusUnknown
How this service works
DripMetricsAI (https://dripmetrics.ai/) provides on-demand crypto market microstructure metrics, Hyperliquid candle metrics, Polymarket diagnostics, and on-chain DefiLlama metrics for agents, dashboards, and trading workflows.
Output
A structured JSON object containing the VPIN metric value (flow-toxicity score), the bucketed YES/NO pressure components used in the calculation, the sample size (number of trades evaluated), the effective analysis window, the market slug, the source, and a computedAt timestamp — giving a quantified measure of how toxic or informed the recent trade flow in the market appears to be.
Example use cases
Example prompt
“What's the VPIN flow-toxicity score for the Polymarket market with slug 'will-the-fed-cut-rates-in-july' over the last 60 minutes? I want to know if there's unusual informed trading pressure on the YES side.”
Technical details
Endpoint
POSThttps://api.dripmetrics.ai/polymarket/vpinWhen to prefer
Use this endpoint when you need a quantitative, microstructure-based measure of informed trading activity or flow toxicity on a specific Polymarket prediction market — particularly when evaluating adverse selection risk before placing trades, detecting information leakage around news events, or monitoring unusual directional pressure. Prefer this over generic volume or price endpoints when the question is specifically about the quality and toxicity of order flow rather than raw price or probability.
Side effects
- Missing both conditionId and slug returns a validation error — at least one is required
- Invalid or unknown conditionId/slug returns a not-found or empty-data error
- Insufficient trade data within the requested window returns a low sample size warning or null metric
- windowMinutes or limit values outside allowed bounds return a 400 validation error
- Payment not sent or insufficient USDC payment via x402 returns a 402 Payment Required response
- Rate limiting or upstream Polymarket data unavailability returns a 503 or timeout error
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": 100,
"conditionId": "0x1234567890abcdef1234567890abcdef",
"windowMinutes": 60
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"value": 0.718124,
"metric": "vpin",
"source": {
"trades": "https://data-api.polymarket.com/trades"
},
"window": {
"endTs": 1781760173624,
"startTs": 1781756573624,
"windowMinutes": 60
},
"components": {
"note": "Polymarket VPIN-style score using equal-notional buckets of inferred YES/NO pressure.",
"vpin": 0.718124,
"buckets": 10,
"bucketSize": 429.796435,
"tradeCount": 55,
"totalVolume": 4297.964345,
"coverageNote": "Trade scan did not reach the full requested lookback; results use the newest API-visible trades within the scan limit.",
"meanImbalance": 308.646931,
"skippedTrades": 45,
"configuredBuckets": 10
},
"computedAt": "2026-06-18T05:22:53.784Z",
"sampleSize": {
"trades": 55,
"scannedTrades": 100
},
"conditionId": "0x1234567890abcdef1234567890abcdef"
}Schema · Response
{
"type": "json",
"example": {
"slug": "fed-decision-in-october",
"value": 0.92349,
"metric": "vpin",
"source": {
"market": "https://gamma-api.polymarket.com/markets/slug/fed-decision-in-october",
"trades": "https://data-api.polymarket.com/trades"
},
"window": {
"windowMinutes": 60
},
"components": {
"note": "Polymarket VPIN-style score using equal-notional buckets of inferred YES/NO pressure.",
"vpin": 0.92349,
"buckets": 10,
"bucketSize": 14.9,
"tradeCount": 4,
"totalVolume": 149,
"meanImbalance": 13.76,
"configuredBuckets": 10
},
"computedAt": "2026-05-25T14:00:00.000Z",
"sampleSize": {
"trades": 4,
"scannedTrades": 4
},
"conditionId": "0xdd22472e552920b8438158ea7238bfadfa4f736aa4cee91a6b86c39ead110917"
}
}Tags
x402
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