$0.05
per call · USD Coin on Base
DripMetricsAI (api description at https://dripmetrics.ai/) provides on-demand market microstructure and risk metrics for agents and developers. Agents can pay per request via x402 and receive structured JSON metrics without subscriptions or API keys. VPIN measures volume-synchronized order-flow imbalance (an adverse-selection proxy, not a probability); see excessVpin. Discovery examples use the latest 30m window.
Endpoint
GET https://api.dripmetrics.ai/metrics/vpin28
Calls / 30d
10
Unique payers / 30d
Sep 8
Last called
exact
Payment scheme
Call this service
import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";
const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);
const res = await fetchWithPay("https://api.dripmetrics.ai/metrics/vpin", {
method: "GET",
});
const data = await res.json();curl -X GET \
"https://api.dripmetrics.ai/metrics/vpin?exchange=coinbase&pair=BTC-USD&window=30m" \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"components": {
"bucketSize": 5,
"buckets": 20,
"buyTrades": 50,
"buyVolume": 50,
"estimatedNullVpin": 0.35682482,
"excessVpin": -0.15682482,
"meanImbalance": 1,
"meanTradeContributionsPerBucket": 5,
"minimumTradeContributionsPerBucket": 5,
"minimumTradeCount": 100,
"oneSidedBuckets": 0,
"sellTrades": 50,
"sellVolume": 50,
"targetBuckets": 20,
"totalVolume": 100,
"tradeCount": 100
},
"computedAt": "2026-05-23T14:00:00.000Z",
"coverage": {
"completeFetch": true,
"coverageRatio": 1,
"effectiveWindowMinutes": 30,
"errorMessage": null,
"partialData": false,
"requestedWindowMinutes": 30
},
"exchange": "coinbase",
"firstTradeTime": "2026-05-23T13:00:02.000Z",
"lastTradeTime": "2026-05-23T13:59:58.000Z",
"metric": "vpin",
"pair": "BTC-USD",
"tradeCount": 100,
"value": 0.2,
"window": "30m"
}Payment details
0xc9b70d8d342609437bc87ec3c877911a306d3e6aUSD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
Pin it to the top of Other and the homepage with a featured placement.
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