# Morrow TIMI Risk Index Calculator > Morrow TIMI Risk Index Calculator 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). Computes the Morrow InTIME-II TIMI risk index (HR × (age/10)² / SBP) and returns the patient's published risk group among the five standard categories ## Facts - Endpoint: GET https://api.magentlab.com/api/calc/timi_risk_index - 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/morrow-timi-risk-index-calculator-37a02045 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jiMjyTS_MHuNyrmW9Xjdf 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 morrow-timi-risk-index-calculator-37a02045 ``` Example prompt: Calculate the TIMI risk index for a 68-year-old patient admitted with a heart rate of 88 bpm and a systolic blood pressure of 115 mmHg, and tell me which of the five Morrow risk groups they fall into. ## When to prefer this Use this endpoint when you need a deterministic, citation-backed TIMI risk index calculation per the Morrow 2001 InTIME-II formula without building the arithmetic yourself. Prefer it over general LLM reasoning for reproducible clinical scoring that must match published group thresholds exactly. Not a substitute for clinical judgment or a reperfusion decision tool. ## Known failure modes - Missing required parameters (age, heart_rate_bpm, or systolic_mm_hg) returns a validation error - Age outside 18–120 range rejected - Heart rate outside 30–220 or SBP outside 50–250 rejected - Division by zero if SBP is zero (rejected by schema minimum) - Inputs outside Morrow 2001 derivation ranges (HR <50 or >150, SBP <60 or >200) may return a warning flag but still compute ## How this service works Morrow InTIME-II TIMI risk index: heart rate × (age/10)^2 / systolic BP, with the five published groups (≤12.5, >12.5–17.5, >17.5–22.5, >22.5–30, >30). Deterministic published arithmetic with citation; not a reperfusion decision. ## Output Returns the computed TIMI risk index numeric value (HR × (age/10)² / SBP) and the corresponding Morrow InTIME-II published risk group (one of: ≤12.5, >12.5–17.5, >17.5–22.5, >22.5–30, >30), along with a citation to the original Morrow 2001 derivation. Flags if inputs fall outside the derivation cohort ranges. Does not produce a reperfusion recommendation. ## 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": [ "age", "heart_rate_bpm", "systolic_mm_hg" ], "properties": { "age": { "type": "integer", "description": "Age in years (18-120)." }, "heart_rate_bpm": { "type": "integer", "description": "Admission heart rate in beats per minute (integer 30-220). Morrow 2001 excluded HR <50 or >150 from derivation; magent still computes the index." }, "systolic_mm_hg": { "type": "number", "description": "Admission systolic blood pressure in mm Hg (50-250). Morrow 2001 excluded SBP <60 or >200 from derivation; magent still computes the index." } } } }, "additionalProperties": false }, "output": { "type": "object", "required": [ "type" ], "properties": { "type": { "type": "string" }, "example": { "type": "object" } } } } } ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "path": "/api/calc/timi_risk_index", "count": 2, "items": [ { "formula": "timi_risk_index", "citation": { "id": "morrow-2001", "doi": "10.1016/S0140-6736(01)06649-1", "title": "A simple risk index for rapid initial triage of patients with ST-elevation myocardial infarction: an InTIME II substudy", "source": "Lancet. 2001;358(9293):1571-1575", "authors": "Morrow DA, Antman EM, Giugliano RP, et al." }, "age_years": 65, "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.", "risk_group": 4, "heart_rate_bpm": 80, "systolic_mm_hg": 120, "timi_risk_index": 28.2, "formula_expression": "timi_risk_index = heart_rate_bpm * (age_years / 10)^2 / systolic_mm_hg" }, { "formula": "timi_risk_index", "citation": { "id": "morrow-2001", "doi": "10.1016/S0140-6736(01)06649-1", "title": "A simple risk index for rapid initial triage of patients with ST-elevation myocardial infarction: an InTIME II substudy", "source": "Lancet. 2001;358(9293):1571-1575", "authors": "Morrow DA, Antman EM, Giugliano RP, et al." }, "age_years": 65, "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.", "risk_group": 4, "heart_rate_bpm": 80, "systolic_mm_hg": 120, "timi_risk_index": 28.2, "formula_expression": "timi_risk_index = heart_rate_bpm * (age_years / 10)^2 / systolic_mm_hg" } ] } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/morrow-timi-risk-index-calculator-37a02045/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)