RFC4226/6238 OTP candidate window correspondence. Reconstruct the fully typed re...
https://detect.halowerk.com/v1/F-TD2000-DOCUMENTS-08/rfc4226-6238-hmac-dynamic-truncation-counter-time-otp-windowOverview
RFC4226/6238 OTP candidate window correspondence. Reconstruct the fully typed result and compare its complete canonical SHA256 claim.
Protocol
x402 (POST)
Price
$0.0030
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
uncategorized
Provider
detect
Source
bazaar
Indexed
2026-11-02 17:26:02
Health
Status
unknown
Latency (p50)
—
Uptime (30d)
—
Reliability Score
—
Last Checked
Never
Last Healthy
Never
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
—
Asset Verified
—
Facilitator
—
Input Schema
{
"body": {
"artifact": {
"hotpTotp": {
"claim": null,
"data": {
"algorithm": "SHA1",
"asserted_otp": null,
"counter": "0",
"digits": 6,
"mode": "HOTP",
"secret_hex": "3132333435363738393031323334353637383930",
"start_time": 0,
"step": 30,
"timestamp": 0,
"window_after": 0,
"window_before": 0
}
}
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Output Schema
{
"example": {
"billable": true,
"findings": [
{
"confidence": 1,
"evidence": [
{
"page_indices": [],
"page_url": null,
"pattern": "rfc4226-6238-hmac-dynamic-truncation-counter-time-otp-window_scoped_evidence",
"type": "artifact"
}
],
"limits": [
"Complete bounded supplied artifact only. computed uses 6dp numbers; full result SHA256 uses UTF16-sorted compact JSON, scalar Unicode unchanged and -0=0. No external lookup, trust/identity or legal verdict."
],
"module": "rfc4226-6238-hmac-dynamic-truncation-counter-time-otp-window",
"state": "observed",
"value": {
"claim_matches": false,
"computed": {
"algorithm": "SHA1",
"candidates": [
{
"counter": "0",
"otp": "755224"
}
],
"center_counter": "0",
"matching_counters": [],
"unique_match": false
},
"computed_sha256": "43b752eb001ba55b7d321952d844a57174510fd91e5cdf9a8a068017a2563753"
},
"warnings": []
}
],
"known_count": 1,
"scope": {
"contact_values_returned": false,
"network": false,
"supplied_artifact_only": true
},
"warnings": []
},
"type": "json"
}