# ABC Score Calculator (Assessment of Blood Consumption) > ABC Score Calculator (Assessment of Blood Consumption) 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 Nunez 2009 ABC Score for predicting massive transfusion need based on injury mechanism, arrival SBP, arrival HR, and FAST result ## Facts - Endpoint: GET https://api.magentlab.com/api/calc/abc_score - 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/abc-score-calculator-assessment-of-blood-consumption-cb18e560 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZavEhyQ9dNrHD0LnQLgT3 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 abc-score-calculator-assessment-of-blood-consumption-cb18e560 ``` Example prompt: Calculate the ABC score for a trauma patient who arrived with a penetrating mechanism, systolic BP of 80 mm Hg, heart rate of 135 bpm, and a positive FAST exam — and tell me if they hit the ≥2 threshold for massive transfusion risk. ## When to prefer this Use this endpoint when you need a deterministic, citeable implementation of the Nunez 2009 ABC Score specifically — not TASH, not ABC/2 ICH volume, not a general transfusion order. Ideal for trauma decision support agents, retrospective registry scoring, or any workflow where you need to apply published arithmetic with a documented sensitivity/specificity profile for massive transfusion prediction. ## Known failure modes - Missing required query parameters (penetrating, systolic_mm_hg, heart_rate_bpm, positive_fast) returns 400 error - systolic_mm_hg outside 0–300 or heart_rate_bpm outside 30–220 range may be rejected as invalid - Payment failure or missing x402 credentials returns 402 - Caller must assign penetrating mechanism and FAST interpretation — the API does not infer these from images or narrative ## How this service works Nunez 2009 ABC (assessment of blood consumption): penetrating mechanism, arrival SBP ≤90 mm Hg, arrival HR ≥120 bpm, and positive FAST; 1 point each, max 4. score_ge_2 is the published ≥2 cutoff (75% sensitive / 86% specific for massive transfusion in that paper). Deterministic published arithmetic with citation; not a transfusion or MTP order; not TASH; not ABC/2 ICH volume. ## Output Returns the integer ABC score from 0 to 4 (one point each for: penetrating mechanism, SBP ≤90 mm Hg, HR ≥120 bpm, positive FAST) and a boolean score_ge_2 flag indicating whether the patient meets the published ≥2 cutoff (75% sensitive, 86% specific for massive transfusion per Nunez 2009). ## 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": [ "penetrating", "systolic_mm_hg", "heart_rate_bpm", "positive_fast" ], "properties": { "penetrating": { "type": "boolean", "description": "Penetrating injury mechanism as assigned by the caller (Nunez 2009). true or false. magent does not assign mechanism." }, "positive_fast": { "type": "boolean", "description": "Positive FAST as assigned by the caller (Nunez 2009). true or false. magent does not interpret FAST images." }, "heart_rate_bpm": { "type": "integer", "description": "Arrival heart rate in beats per minute (integer 30-220). ≥120 scores 1." }, "systolic_mm_hg": { "type": "integer", "description": "Arrival systolic blood pressure in mm Hg (integer 0-300). ≤90 scores 1." } } } }, "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/abc_score", "count": 2, "items": [ { "score": 0, "formula": "abc_score", "citation": { "id": "nunez-2009", "doi": "10.1097/TA.0b013e3181961c35", "pmid": "19204506", "title": "Early prediction of massive transfusion in trauma: simple as ABC (assessment of blood consumption)?", "source": "J Trauma. 2009;66(2):346-352", "authors": "Nunez TC, Voskresensky IV, Dossett LA, Shinall R, Dutton WD, Cotton BA" }, "max_score": 4, "components": [ { "factor": "penetrating", "points": 0, "present": false }, { "value": 120, "factor": "sbp_le_90", "points": 0, "present": false }, { "value": 80, "factor": "hr_ge_120", "points": 0, "present": false }, { "factor": "positive_fast", "points": 0, "present": false } ], "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.", "score_ge_2": false, "formula_expression": "ABC = penetrating + sbp_le_90 + hr_ge_120 + positive_fast; each 1; max 4; score_ge_2 iff score >= 2" }, { "score": 0, "formula": "abc_score", "citation": { "id": "nunez-2009", "doi": "10.1097/TA.0b013e3181961c35", "pmid": "19204506", "title": "Early prediction of massive transfusion in trauma: simple as ABC (assessment of blood consumption)?", "source": "J Trauma. 2009;66(2):346-352", "authors": "Nunez TC, Voskresensky IV, Dossett LA, Shinall R, Dutton WD, Cotton BA" }, "max_score": 4, "components": [ { "factor": "penetrating", "points": 0, "present": false }, { "value": 120, "factor": "sbp_le_90", "points": 0, "present": false }, { "value": 80, "factor": "hr_ge_120", "points": 0, "present": false }, { "factor": "positive_fast", "points": 0, "present": false } ], "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.", "score_ge_2": false, "formula_expression": "ABC = penetrating + sbp_le_90 + hr_ge_120 + positive_fast; each 1; max 4; … (truncated) ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/abc-score-calculator-assessment-of-blood-consumption-cb18e560/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)