x402 census · api.magentlab.com · 5ff71961d68b · JSON
POST /api/calc/ohfrs
unreachable
Ottawa Heart Failure Risk Scale (OHFRS; Stiell 2013 derivation). Ten caller-assigned flags (stroke/TIA 1, intubation 2, arrival HR >=110 2, arrival SaO2 <90% 1, walk-test HR >=110 or unable 1, new ischemic ECG 2, urea >=12 mmol/L 1, CO2 >=35 mmol/L 2, troponin at MI level 2, NT-proBNP >=5000 ng/L 1); integer points, max 15. Derivation SAE risk 2.8% to 89.0%. Not a medical device, not a dispositio…
Verdict: dead listing. connection failed or timed out.
Facts from the catalogs
| Field | Value |
|---|---|
| URL | https://api.magentlab.com/api/calc/ohfrs |
| Method | POST |
| Price | $0.005 USDC = 5000 atomic units of 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 |
| Network | eip155:8453 (base) |
| payTo | 0x836Be278f1739fB4308091cD1852F7971Bc19Ee2 |
| Seller | api.magentlab.com |
| Catalogs | cdp (row updated 2026-09-28) |
| Listed since (lower bound) | 2026-09-28 (earliest catalog timestamp; catalogs report last-update times only) |
| Last catalog update | 2026-09-28 |
| CDP quality counters | 1 calls and 1 unique payers in 30 days, last call 2026-09-28 (catalog-reported, not verified on chain) |
| Category (keyword rule) | dev-tools/utilities |
| Templated path | no |
| x402Version in catalog | 2 |
| Service name / tags | magent · ohfrs, heart-failure, emergency, stiell, calculator |
Unpaid probe (census of 2026-09-30)
| Field | Value |
|---|---|
| Probed at | 2026-09-30T23:19:17.300Z |
| HEAD | no answer |
| GET | no answer |
| Verdict | unreachable connection failed or timed out |
| 402 carried in | n/a |
| x402Version in the 402 | n/a |
| accepts[0] | none |
| Live amount equals catalog price | no (live vs catalog 5000) |
| Live payTo equals catalog payTo | no |
| extensions.bazaar in the 402 | no |
| PAYMENT-REQUIRED header | no |
| WWW-Authenticate offer | none |
| Content type / server / CORS | n/a / n/a / none |
| Latency | 0 ms |
| Error | skipped: host unreachable (fetch failed: ECONNRESET) after 3 consecutive connection errors |
No hourly re-probe has reached this resource yet; the cron covers a rotating slice of 150 per hour.
On-chain facts for the payTo (public address)
| Field | Value |
|---|---|
| Distinct payers | 1 |
| Payments | 2 |
| USDC volume | $0.01 |
| Median payment | $0.005 |
| First / last payment | 2026-08-26 / 2026-08-26 |
| Sampler-shaped share of payments | 100.0% |
| Payers that are not samplers | 0 |
| Source | forensics-2026-09-30 |
| Address | 0x836Be278f1739fB4308091cD1852F7971Bc19Ee2 |
Declared input and output (extensions.bazaar)
{
"input": {
"body": {
"items": [
{
"co2_ge_35_mmol_l": false,
"history_stroke_or_tia": false,
"hr_arrival_ge_110": false,
"intubation_respiratory_distress": false,
"new_ischemic_ecg": false,
"ntprobnp_ge_5000": false,
"sao2_lt_90_arrival": false,
"troponin_mi_level": false,
"urea_ge_12_mmol_l": false,
"walk_test_hr_ge_110_or_unable": false
},
{
"co2_ge_35_mmol_l": false,
"history_stroke_or_tia": false,
"hr_arrival_ge_110": false,
"intubation_respiratory_distress": false,
"new_ischemic_ecg": false,
"ntprobnp_ge_5000": false,
"sao2_lt_90_arrival": false,
"troponin_mi_level": false,
"urea_ge_12_mmol_l": false,
"walk_test_hr_ge_110_or_unable": false
}
]
},
"method": "POST",
"type": "http"
},
"output": {
"type": "json",
"example_truncated": true,
"chars": 3304
}
}
Try it (unpaid: shows the 402)
curl -si -X POST 'https://api.magentlab.com/api/calc/ohfrs' -H 'accept: application/json' -H 'content-type: application/json' --data '{}'
The catalog declares POST. A 402 answer carries the payment requirements in the JSON body and, for x402 v2, base64 in the PAYMENT-REQUIRED header. This page never sends a payment.
Paid checks (x402, USDC on Base)
GET https://bazaar.agentexchange.work/r/5ff71961d68b/probe.json re-runs this probe right now for $0.01 and writes the result here. POST https://bazaar.agentexchange.work/featured with {"id":"5ff71961d68b"} places this resource at the top of the report and search pages for 30 days for $1.00, labelled. Unpaid requests answer 402 with the terms. Pricing.
Catalog references: agentic.market (CDP Bazaar front end) · this record as JSON · all resources on api.magentlab.com.