# magent Tokyo Guidelines 2018 Acute Cholecystitis Grader > magent Tokyo Guidelines 2018 Acute Cholecystitis Grader is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14). Applies the Yokoe 2018 TG18 criteria to classify acute cholecystitis diagnosis (none/suspected/definite) and severity grade (I/II/III) from caller-assigned clinical findings ## Facts - Endpoint: GET https://api.magentlab.com/api/calc/tokyo_cholecystitis - Price: $0.005/call - Payment: x402 - Status: unknown - Last checked: 2026-09-14 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/magent-tokyo-guidelines-2018-acute-cholecystitis-grader-2742f605 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZDwtxfqGwuTJzBhC9OpZ9 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 magent-tokyo-guidelines-2018-acute-cholecystitis-grader-2742f605 ``` Example prompt: Grade this patient's acute cholecystitis using the Tokyo 2018 TG18 criteria: Murphy's sign is positive, RUQ tenderness is present, fever is true, elevated CRP is true, elevated WBC is true, imaging findings are positive; for severity flags: hypotension requiring vasopressors is false, decreased consciousness is false, PF ratio <300 is false, oliguria or creatinine >2 is false, PT-INR >1.5 is false, platelets <100k is false, WBC >18000 is true, palpable tender RUQ mass is false, duration >72h is false, marked local inflammation is false. ## When to prefer this Use this endpoint when you need to programmatically apply the Yokoe 2018 TG18 acute cholecystitis diagnosis and severity grading criteria to pre-assessed clinical findings. Prefer this over manual lookup when building clinical decision support workflows, automated triage pipelines, or EHR integrations that need consistent, rules-based TG18 grading. Do not use for cholangitis (different guideline), appendicitis (Alvarado/RIPASA/PAS), or when imaging or lab interpretation is needed — the caller must supply all boolean flags. ## Known failure modes - Missing required query parameters returns a validation error - All local/systemic signs false yields diagnosis 'none' and no severity grade - Imaging absent with local and systemic signs present yields 'suspected' rather than 'definite' - Misclassification risk if caller incorrectly assigns boolean flags (garbage in, garbage out) - Not applicable to cholangitis or appendicitis — wrong endpoint for those conditions ## How this service works Yokoe 2018 TG18 (=TG13) acute cholecystitis. Definite if local signs (Murphy or RUQ mass/pain/tenderness), systemic signs (fever, elevated CRP or WBC), and imaging; suspected if local and systemic without imaging; else none. Suspected/definite: Grade III if any organ dysfunction, else Grade II if any Grade II flag, else Grade I. Severity none when diagnosis is none. Not cholangitis or Alvarado/RIPASA. magent does not examine, assay, or read imaging. Not a medical device. ## Output Returns the Tokyo Guidelines 2018 (TG18/TG13) acute cholecystitis diagnosis category (none, suspected, or definite) and severity grade (I, II, or III) based on the caller-supplied boolean clinical findings. No physical examination, laboratory assay, or imaging interpretation is performed by the API. ## 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": [ "murphy", "ruq_mass_pain_tenderness", "fever", "elevated_crp", "elevated_wbc", "imaging_findings", "hypotension_vasopressors", "decreased_consciousness", "pfr_lt_300", "oliguria_or_creatinine_gt_2", "pt_inr_gt_1_5", "platelets_lt_100k", "wbc_gt_18000", "palpable_tender_ruq_mass", "duration_gt_72h", "marked_local_inflammation" ], "properties": { "fever": { "type": "boolean", "description": "Fever as assigned by the caller (Yokoe 2018 TG18 systemic sign of inflammation B). true or false. magent does not measure temperature." }, "murphy": { "type": "boolean", "description": "Murphy's sign as assigned by the caller (Yokoe 2018 TG18 local sign of inflammation A). true or false. magent does not examine the patient." }, "pfr_lt_300": { "type": "boolean", "description": "PaO2/FiO2 <300 as assigned by the caller (Yokoe 2018 TG18 Grade III respiratory dysfunction). true or false. magent does not interpret blood gas or ventilator settings." }, "elevated_crp": { "type": "boolean", "description": "Elevated C-reactive protein as assigned by the caller (Yokoe 2018 TG18 systemic sign of inflammation B). true or false. magent does not assay CRP." }, "elevated_wbc": { "type": "boolean", "description": "Elevated white blood cell count as assigned by the caller (Yokoe 2018 TG18 systemic sign of inflammation B). true or false. magent does not assay WBC." }, "wbc_gt_18000": { "type": "boolean", "description": "White blood cell count >18,000/mm³ as assigned by the caller (Yokoe 2018 TG18 Grade II). true or false. magent does not assay WBC." }, "pt_inr_gt_1_5": { "type": "boolean", "description": "PT-INR >1.5 as assigned by the caller (Yoko … (truncated) ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/magent-tokyo-guidelines-2018-acute-cholecystitis-grader-2742f605/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)