$0.004
per call · USD Coin on Base
Runs three detectors over one series and reports what each saw: a robust z score on median and median absolute deviation, a robust seasonal-trend decomposition with a z score on the residual, and an isolation forest over value and step-to-previous. Every score is returned per point, so callers set their own threshold instead of trusting a verdict. The forest draws from a fixed seed: same request, same result. Under three full cycles the seasonal figure is marked as not robust.
Endpoint
POST https://tools.halowerk.com/v1/series/anomaly1
Calls / 30d
1
Unique payers / 30d
Aug 19
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://tools.halowerk.com/v1/series/anomaly", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
"contamination": 0.1,
"methods": [
"robust_z",
"isolation_forest"
],
"min_votes": 2,
"points": [
12.1,
12.4,
11.9,
12.3,
12,
12.2,
48.7,
12.1,
11.8,
12.5,
12.2,
12
],
"seed": 42
}),
});
const data = await res.json();curl -X POST \
"https://tools.halowerk.com/v1/series/anomaly" \
-H "Content-Type: application/json" \
-d '{"contamination":0.1,"methods":["robust_z","isolation_forest"],"min_votes":2,"points":[12.1,12.4,11.9,12.3,12,12.2,48.7,12.1,11.8,12.5,12.2,12],"seed":42}' \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"anomalies": [
{
"flagged_by": [
"robust_z",
"isolation_forest"
],
"index": 6,
"scores": {
"isolation_forest": 0.83,
"robust_z": 123.4
},
"time": null,
"time_unix_s": null,
"value": 48.7
}
],
"anomaly_count": 1,
"deterministic": true,
"method_details": {
"isolation_forest": {
"contamination": 0.1,
"features": [
"value",
"delta_to_previous"
],
"flagged": 2,
"sample_size": 12,
"score_cutoff": 0.71,
"seed": 42,
"trees": 100
},
"robust_z": {
"flagged": 1,
"median": 12.15,
"scale": 0.29652,
"scale_basis": "mad",
"threshold": 3.5
}
},
"methods": [
"robust_z",
"isolation_forest"
],
"min_votes": 2,
"point_count": 12,
"points": [
{
"flagged_by": [],
"index": 0,
"is_anomaly": false,
"label": null,
"scores": {
"isolation_forest": 0.42,
"robust_z": -0.169
},
"time": null,
"time_unix_s": null,
"value": 12.1
}
],
"seed": 42,
"stateless": true,
"statistics": {
"max": 48.7,
"mean": 15.016667,
"median": 12.15,
"min": 11.8,
"stddev": 10.593
}
}Payment details
0x2880edfff13100677bf97a3cbdf3bc34771c4e5eUSD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
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