{"api":"v1","generated_at":"2026-10-02T17:35:49.710Z","licence":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/","attribution":"TOLL, with a link to the page cited"},"page":"https://tollindex.com/e/api-magentlab-com-api-calc-steinhart-94fb86","pinned_page":"https://tollindex.com/e/api-magentlab-com-api-calc-steinhart-94fb86/at/2026-10-02T12-31Z","pinned":false,"method":"https://tollindex.com/ledger/method","snapshot_at":"2026-10-02T12:31:46.748Z","snapshot_stamp":"2026-10-02T12-31Z","endpoint":{"slug":"api-magentlab-com-api-calc-steinhart-94fb86","canonical_url":"https://api.magentlab.com/api/calc/steinhart","resource":"https://api.magentlab.com/api/calc/steinhart","http_method":"POST","type":"http","x402_version":2,"registries":["cdp"],"primary_registry":"cdp","curated_by_coinbase":false,"description":"Steinhart 2009 Equation 1 probability of acute heart failure from caller-assigned age, clinician pretest probability (fraction 0-1 or 0-100 percent), and NT-proBNP in pg/mL. Returns estimated_probability_percent from the unrounded probability plus published ≤0.20 rule-out and ≥0.80 rule-in flags. Not a diagnosis, diuretic, or admission order. magent does not assay NT-proBNP.","service_name":"magent","declared_category":null,"declared_tags":["steinhart","ahf","nt-probnp","dyspnea","calculator"],"route_template":null,"registry_updated":"2026-09-28T13:43:13.538Z"},"derived":{"note":"fields no registry supplies; TOLL derives them and marks them derived on the page","title":"calc steinhart","category":"other","first_observed_by_toll":"2026-09-28T13:51:25.436Z","last_observed_by_toll":"2026-10-02T12:31:46.748Z","observation_began":"2026-09-10"},"presence":{"listed_now":true,"first_absent_at":null,"delisting_confirmed_at":null,"events":[{"registry":"cdp","at":"2026-09-28T13:51:25.437Z","event":"listed"},{"registry":"cdp","at":"2026-09-30T12:32:05.628Z","event":"delisted"},{"registry":"cdp","at":"2026-09-30T22:14:11.940Z","event":"relisted"}]},"accepts":[{"registry":"cdp","ordinal":0,"network":"eip155:8453","asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USD Coin","symbol":"USDC","decimals":6,"amount_display":"0.005 USDC","amount_units":0.005,"decimals_known":true,"pay_to":"0x836Be278f1739fB4308091cD1852F7971Bc19Ee2","scheme":"exact"}],"counters":{"observed_at":"2026-10-02T12:31:46.748Z","calls_30d":1,"unique_payers_30d":1,"last_called_at":"2026-09-28T13:43:13.370Z"},"validation":{"latest":{"observed_at":"2026-10-02T15:45:06.187Z","state":"pass","failed_checks":[],"endpoint_http_status":402,"run_id":"daily-2026-10-02"},"uptime":[{"days":7,"observed":6,"passed":6,"ratio":1},{"days":30,"observed":6,"passed":6,"ratio":1},{"days":90,"observed":6,"passed":6,"ratio":1}],"history_90d":[{"observed_at":"2026-10-02T15:45:06.187Z","state":"pass","failed_checks":[],"run_id":"daily-2026-10-02","state_changed":false},{"observed_at":"2026-10-01T08:33:39.447Z","state":"pass","failed_checks":[],"run_id":"daily-2026-10-01","state_changed":false},{"observed_at":"2026-09-30T07:56:26.988Z","state":"pass","failed_checks":[],"run_id":"daily-2026-09-30","state_changed":false},{"observed_at":"2026-09-29T20:08:40.898Z","state":"pass","failed_checks":[],"run_id":"daily-2026-09-29","state_changed":false},{"observed_at":"2026-09-28T17:12:36.655Z","state":"pass","failed_checks":[],"run_id":"daily-2026-09-28","state_changed":false},{"observed_at":"2026-09-28T16:45:36.509Z","state":"pass","failed_checks":[],"run_id":"new-after-daily-2026-09-28","state_changed":true}]},"seller":{"wallet":"0x836Be278f1739fB4308091cD1852F7971Bc19Ee2","page":"https://tollindex.com/seller/0x836Be278f1739fB4308091cD1852F7971Bc19Ee2","endpoints":844,"hosts":1},"reports":0,"registry_record":{"cdp":[{"tags":["steinhart","ahf","nt-probnp","dyspnea","calculator"],"type":"http","accepts":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2","paymentFlow":"upfront","resourceUrl":"https://api.magentlab.com/api/calc/steinhart","assetTransferMethod":"eip3009"},"payTo":"0x836Be278f1739fB4308091cD1852F7971Bc19Ee2","amount":"5000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":600}],"quality":{"lastCalledAt":"2026-09-28T13:43:13.37Z","l30DaysTotalCalls":1,"l30DaysUniquePayers":1},"resource":"https://api.magentlab.com/api/calc/steinhart","extensions":{"bazaar":{"info":{"input":{"body":{"items":[{"age":70,"nt_probnp_pg_ml":1000,"pretest_probability":0.5},{"age":70,"nt_probnp_pg_ml":1000,"pretest_probability":0.5}]},"type":"http","method":"POST"},"output":{"type":"json","example":{"path":"/api/calc/steinhart","count":2,"items":[{"logit":4.39,"formula":"steinhart","citation":{"id":"steinhart-2009","doi":"10.1016/j.jacc.2009.05.065","pmid":"19815125","title":"Improving the Diagnosis of Acute Heart Failure Using a Validated Prediction Model","source":"J Am Coll Cardiol. 2009;54(16):1515-1521","authors":"Steinhart B, Thorpe KE, Bayoumi AM, Moe G, Januzzi JL Jr, Mazer CD"},"age_years":70,"disclaimer":"Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.","ahf_ge_0_80":true,"ahf_le_0_20":false,"nt_probnp_pg_ml":1000,"formula_expression":"Pr(AHF) = 1 / (1 + exp(1.801 - 0.011*age - 5.914*pretest - 0.822*log10(nt_probnp_pg_ml))); pretest is clinician pretest probability as a fraction 0-1 (0-100 percent is divided by 100); NT-proBNP is pg/mL; logit = -(1.801 - 0.011*age - 5.914*pretest - 0.822*log10(nt_probnp_pg_ml)), 2 decimals; estimated_probability_percent = 100 * Pr(AHF) from the unrounded probability, 2 decimals; ahf_le_0_20 is true when Pr(AHF) <= 0.20; ahf_ge_0_80 is true when Pr(AHF) >= 0.80 (Steinhart 2009)","pretest_probability":0.5,"estimated_probability_percent":98.78},{"logit":4.39,"formula":"steinhart","citation":{"id":"steinhart-2009","doi":"10.1016/j.jacc.2009.05.065","pmid":"19815125","title":"Improving the Diagnosis of Acute Heart Failure Using a Validated Prediction Model","source":"J Am Coll Cardiol. 2009;54(16):1515-1521","authors":"Steinhart B, Thorpe KE, Bayoumi AM, Moe G, Januzzi JL Jr, Mazer CD"},"age_years":70,"disclaimer":"Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.","ahf_ge_0_80":true,"ahf_le_0_20":false,"nt_probnp_pg_ml":1000,"formula_expression":"Pr(AHF) = 1 / (1 + exp(1.801 - 0.011*age - 5.914*pretest - 0.822*log10(nt_probnp_pg_ml))); pretest is clinician pretest probability as a fraction 0-1 (0-100 percent is divided by 100); NT-proBNP is pg/mL; logit = -(1.801 - 0.011*age - 5.914*pretest - 0.822*log10(nt_probnp_pg_ml)), 2 decimals; estimated_probability_percent = 100 * Pr(AHF) from the unrounded probability, 2 decimals; ahf_le_0_20 is true when Pr(AHF) <= 0.20; ahf_ge_0_80 is true when Pr(AHF) >= 0.80 (Steinhart 2009)","pretest_probability":0.5,"estimated_probability_percent":98.78}]}},"iconUrl":"https://api.magentlab.com/favicon.ico"},"schema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"body":{"type":"object","required":["items"],"properties":{"items":{"type":"array","items":{"type":"object","required":["age","pretest_probability","nt_probnp_pg_ml"],"properties":{"age":{"type":"integer","description":"Age in years, integer 18-100. Steinhart 2009 Equation 1 coefficient -0.011 per year. magent does not read an identity document."},"nt_probnp_pg_ml":{"type":"number","description":"NT-proBNP in pg/mL (5-35000). Enters as log10. Not pmol/L; magent does not convert units or assay NT-proBNP."},"pretest_probability":{"type":"number","description":"Caller-assigned clinician pretest probability of acute heart failure before NT-proBNP. Fraction 0-1, or 0-100 percent (values above 1 are divided by 100). 1 means certainty, not 1 percent. Steinhart 2009 coefficient -5.914 on the fraction. magent does not assign pretest probability or examine the patient."}}},"maxItems":25,"minItems":1}},"additionalProperties":false},"type":{"type":"string","const":"http"},"method":{"type":"string","const":"POST"},"headers":{"type":"object","additionalProperties":{"type":"string"}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}}}},"description":"Steinhart 2009 Equation 1 probability of acute heart failure from caller-assigned age, clinician pretest probability (fraction 0-1 or 0-100 percent), and NT-proBNP in pg/mL. Returns estimated_probability_percent from the unrounded probability plus published ≤0.20 rule-out and ≥0.80 rule-in flags. Not a diagnosis, diuretic, or admission order. magent does not assay NT-proBNP.","lastUpdated":"2026-09-28T13:43:13.538Z","serviceName":"magent","x402Version":2}]}}