# CRUSADE In-Hospital Major Bleeding Score (NSTE-ACS) > CRUSADE In-Hospital Major Bleeding Score (NSTE-ACS) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15). Calculates the CRUSADE bleeding risk score for NSTE-ACS/NSTEMI patients using eight clinical parameters, returning the integer score, quintile band, and published in-hospital major-bleeding percentage. ## Facts - Endpoint: GET https://api.magentlab.com/api/calc/crusade - Price: $0.005/call - Payment: x402 - Status: unknown - Last checked: 2026-09-15 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/crusade-in-hospital-major-bleeding-score-nste-acs-29bec8d3 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3EbXrqiG3sioDK-_IuvRZ Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. ## How to call it through Zero Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`): ```sh zero fetch --capability crusade-in-hospital-major-bleeding-score-nste-acs-29bec8d3 ``` Example prompt: Calculate the CRUSADE major bleeding score for a female NSTE-ACS patient: hematocrit 33%, CrCl 45 mL/min, heart rate 95 bpm, systolic BP 130 mmHg, signs of CHF present, prior vascular disease absent, no diabetes — what's her score and bleeding risk quintile? ## When to prefer this Use this endpoint when you need a validated, published CRUSADE bleeding risk score for an NSTE-ACS or NSTEMI patient and already have Cockcroft–Gault CrCl computed externally. Prefer this over general risk calculators when the clinical context is specifically non-ST-elevation ACS and you need the Subherwal 2009 quintile-band bleeding percentages for documentation or shared decision-making. ## Known failure modes - Missing required query parameters returns a 400 error - CrCl value out of range (1–300 mL/min) rejected - Heart rate out of range (30–220 bpm) rejected - Hematocrit out of range (10–70%) rejected - Systolic BP out of range (50–250 mmHg) rejected - Invalid sex value (must be 'female' or 'male') rejected - Payment not attached or insufficient results in 402 Payment Required ## How this service works CRUSADE in-hospital major bleeding score (Subherwal 2009 Table 4) for NSTE-ACS / NSTEMI. Points from hematocrit, caller-assigned Cockcroft–Gault CrCl, heart rate, sex, CHF, prior vascular disease, diabetes, and systolic BP. Returns integer score (max 96), quintile band, and published in-hospital major-bleeding percent. Not a medical device; magent does not compute CrCl or examine the patient. ## Output Returns an integer CRUSADE score (0–96), the corresponding quintile risk band (very low, low, moderate, high, or very high), and the Subherwal 2009 published in-hospital major-bleeding percentage associated with that band. ## Request schema (JSON Schema) ```json { "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "input" ], "properties": { "input": { "type": "object", "required": [ "type", "method" ], "properties": { "type": { "type": "string", "const": "http" }, "method": { "enum": [ "GET", "HEAD", "DELETE" ], "type": "string" }, "headers": { "type": "object", "additionalProperties": { "type": "string" } }, "queryParams": { "type": "object", "required": [ "hematocrit_percent", "crcl_ml_min", "heart_rate_bpm", "sex", "signs_of_chf", "prior_vascular_disease", "diabetes", "systolic_mm_hg" ], "properties": { "sex": { "type": "string", "description": "Sex (female or male). Female scores 8; male scores 0." }, "diabetes": { "type": "boolean", "description": "Diabetes mellitus as assigned by the caller. true or false. 6 points if true." }, "crcl_ml_min": { "type": "number", "description": "Creatinine clearance in mL/min (1-300), Cockcroft–Gault as assigned by the caller. magent does not compute Cockcroft–Gault. Table 4: ≤15 → 39; >15–30 → 35; >30–60 → 28; >60–90 → 17; >90–120 → 7; >120 → 0." }, "signs_of_chf": { "type": "boolean", "description": "Signs of CHF at presentation as assigned by the caller. true or false. 7 points if true. magent does not examine the patient." }, "heart_rate_bpm": { "type": "integer", "description": "Heart rate in beats per minute (integer 30-220). Table 4: ≤70 → 0; 71–80 → 1; 81–90 → 3; 91–100 → 6; 101–110 → 8; 111–120 → 10; ≥121 → 11." }, "systolic_mm_hg": { "type": "number", "description": "Systolic blood pressure in mm Hg (50-250). Table 4 is non-monotonic: ≤90 → 10; 91–100 → 8; 101–120 → 5; 121–180 → 1; 181–200 → 3; ≥201 → 5." }, "hematocrit_percent": { "type": "number", "description": "Hematocrit percent (10-70). Subherwal 2009 Table 4: <31 → 9; 31–<34 → 7; 34–<37 → 3; 37–<40 → 2; ≥40 → 0." }, "prior_vascular_disease": { "type": "boolean", "description": "Prior vascular disease (PAD or prior stroke) as assigned by the caller. true or false. 6 points if true." } } } }, "additionalProperties": false }, "output": { "type": "object", "re … (truncated) ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "path": "/api/calc/crusade", "count": 2, "items": [ { "sex": "male", "score": 1, "formula": "crusade", "citation": { "id": "subherwal-2009", "doi": "10.1161/CIRCULATIONAHA.108.828541", "pmid": "19332461", "title": "Baseline risk of major bleeding in non–ST-segment-elevation myocardial infarction: the CRUSADE Bleeding Score", "source": "Circulation. 2009;119(14):1873-1882", "authors": "Subherwal S, Bach RG, Chen AY, et al." }, "diabetes": false, "max_score": 96, "components": [ { "value": 42, "factor": "hematocrit_percent", "points": 0, "present": false }, { "value": 130, "factor": "crcl_ml_min", "points": 0, "present": false }, { "value": 65, "factor": "heart_rate_bpm", "points": 0, "present": false }, { "value": "male", "factor": "sex", "points": 0, "present": false }, { "factor": "signs_of_chf", "points": 0, "present": false }, { "factor": "prior_vascular_disease", "points": 0, "present": false }, { "factor": "diabetes", "points": 0, "present": false }, { "value": 140, "factor": "systolic_mm_hg", "points": 1, "present": true } ], "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.", "crcl_ml_min": 130, "crusade_band": "very_low", "signs_of_chf": false, "heart_rate_bpm": 65, "systolic_mm_hg": 140, "formula_expression": "CRUSADE = hematocrit(<31:9, 31-<34:7, 34-<37:3, 37-<40:2, >=40:0) + crcl_ml_min(<=15:39, >15-30:35, >30-60:28, >60-90:17, >90-120:7, >120:0) + heart_rate(<=70:0, 71-80:1, 81-90:3, 91-100:6, 101-110:8, 111-120:10, >=121:11) + female(8) + signs_of_chf(7) + prior_vascular_disease(6) + diabetes(6) + systolic(<=90:10, 91-100:8, 101-120:5, 121-180:1, 181-200:3, >=201:5); Subherwal 2009 Table 4; quintiles <=20 3.1%, 21-30 5.5%, 31-40 8.6%, 41-50 11.9%, >50 19.5%; max 96", "hematocrit_percent": 42, "prior_vascular_disease": false, "in_hospital_major_bleeding_percent": 3.1 }, { "sex": "male", "score": 1, "formula": "crusade", "citation": { "id": "subherwal-2009", "doi": "10.116 … (truncated) ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crusade-in-hospital-major-bleeding-score-nste-acs-29bec8d3/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from api.magentlab.com](https://www.zero.xyz/host/api.magentlab.com/llms.txt)