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DripMetrics VPIN (Volume-Synchronized Probability of Informed Trading)
x402
DripMetrics VPIN (Volume-Synchronized Probability of Informed Trading) is a paid API for AI agents from api.dripmetrics.ai, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-10).
Computes VPIN, a measure of the probability of informed trading, for a specified crypto trading pair and exchange over a recent lookback window.
Price / call$0.05
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
Returns a JSON object with the VPIN scalar value (0–1 probability), the trading pair, exchange, window, computation timestamp, trade count, first and last trade timestamps, and breakdown components (bucket count, bucket size, total volume, mean imbalance).
Example use cases
Example prompt
“What's the current VPIN for BTCUSDT on Binance over the last 1 hour — I want to know how much informed trading activity is happening right now.”
Technical details
Endpoint
GEThttps://api.dripmetrics.ai/metrics/vpin?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a real-time, volume-clock-based informed trading probability signal for a specific crypto pair on Binance or Coinbase — particularly useful for detecting toxic order flow, assessing adverse selection risk before placing large orders, or building microstructure-aware trading strategies. Prefer this over simpler spread or volume metrics when you need a theoretically grounded, academically recognized measure of information asymmetry.
Side effects
- Unsupported exchange name returns an error (only 'binance' or 'coinbase' accepted)
- Unsupported window value returns an error (only '30m' or '1h' accepted)
- Invalid or unrecognized pair symbol returns an error or empty result
- Insufficient trade data in the window may result in a low tradeCount or computation error
- Payment failure (x402) if USDC balance is insufficient blocks the request
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"pair": "BTCUSDT",
"window": "1h",
"exchange": "binance"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"pair": "BTCUSDT",
"value": 0.32208094,
"metric": "vpin",
"window": "1h",
"exchange": "binance",
"components": {
"buckets": 20,
"bucketSize": 8.160213,
"totalVolume": 163.20426,
"meanImbalance": 2.628249
},
"computedAt": "2026-05-25T04:33:47.113Z",
"tradeCount": 15970,
"lastTradeTime": "2026-05-25T04:33:46.862Z",
"firstTradeTime": "2026-05-25T03:33:47.919Z"
}Schema · Response
{
"type": "json",
"example": {
"pair": "BTC-USD",
"value": 0.18624412,
"metric": "vpin",
"window": "30m",
"coverage": {
"partialData": false,
"errorMessage": null,
"completeFetch": true,
"coverageRatio": 1,
"effectiveWindowMinutes": 30,
"requestedWindowMinutes": 30
},
"exchange": "coinbase",
"components": {
"buckets": 20,
"bucketSize": 12.842913,
"totalVolume": 256.85826,
"meanImbalance": 2.392118
},
"computedAt": "2026-05-23T14:00:00.000Z",
"tradeCount": 428,
"lastTradeTime": "2026-05-23T13:59:58.000Z",
"firstTradeTime": "2026-05-23T13:00:02.000Z"
}
}Tags
x402
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