# Modified Fisher CT Grade Lookup (Frontera 2006) > Modified Fisher CT Grade Lookup (Frontera 2006) 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). Returns the published Frontera 2006 modified Fisher scale grade label and description for subarachnoid hemorrhage, given a caller-assigned CT grade of 0–4. ## Facts - Endpoint: GET https://api.magentlab.com/api/calc/modified_fisher - 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/modified-fisher-ct-grade-lookup-frontera-2006-4838277a - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0BthPPWP7ClKXGCrIr6MG 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 modified-fisher-ct-grade-lookup-frontera-2006-4838277a ``` Example prompt: The CT scan has been read and the radiologist assigned a modified Fisher grade of 3 — can you look up what that grade means on the Frontera 2006 scale? ## When to prefer this Use this endpoint when an agent needs to retrieve the canonical published text of a Frontera 2006 modified Fisher CT grade for subarachnoid hemorrhage that has already been assigned by a clinician or radiologist. Prefer this over manual lookup tables when automating clinical documentation, EHR population, or educational tools. Do not use this to grade a CT scan from raw imaging — the grade must be externally assigned first. ## Known failure modes - Grade value outside 0–4 integer range returns an error or empty result - Non-integer grade values (e.g. 1.5) are rejected - Missing required 'grade' query parameter returns a 400 error - Confusion with original Fisher 1980 scale (groups 1–4) may lead to wrong grade being submitted ## How this service works Frontera 2006 modified Fisher CT grades 0-4 for subarachnoid hemorrhage as assigned from CT by the caller. Returns the published grade and description (0 no SAH or IVH; 1 focal or diffuse thin SAH, no IVH; 2 thin SAH with IVH; 3 thick SAH, no IVH; 4 thick SAH with IVH). Not Fisher 1980 original groups 1-4. Not a diagnosis; magent does not read the CT or invent a millimetre cutoff or vasospasm percentage. ## Output Returns the Frontera 2006 modified Fisher grade number and its published description: grade 0 (no SAH or IVH), grade 1 (focal or diffuse thin SAH, no IVH), grade 2 (thin SAH with IVH), grade 3 (thick SAH, no IVH), or grade 4 (thick SAH with IVH). The endpoint does not read CT images or make clinical diagnoses. ## 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": [ "grade" ], "properties": { "grade": { "type": "integer", "description": "Frontera 2006 modified Fisher CT grade 0-4 as assigned by the caller from CT (0 no SAH or IVH; 1 focal or diffuse thin SAH, no IVH; 2 focal or diffuse thin SAH with IVH; 3 thick SAH, no IVH; 4 thick SAH with IVH). magent does not read the CT. Not Fisher 1980 original groups 1-4." } } } }, "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/modified_fisher", "count": 2, "items": [ { "grade": 1, "score": 1, "formula": "modified_fisher", "citation": { "id": "frontera-2006", "doi": "10.1227/01.NEU.0000218821.34014.1B", "pmid": "16823296", "title": "Prediction of symptomatic vasospasm after subarachnoid hemorrhage: the modified fisher scale", "source": "Neurosurgery. 2006;59(1):21-27", "authors": "Frontera JA, Claassen J, Schmidt JM, et al." }, "max_score": 4, "components": [ { "factor": "grade", "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.", "description": "Focal or diffuse, thin SAH, no IVH", "formula_expression": "Frontera 2006 modified Fisher CT grade 0-4 as assigned by the caller" }, { "grade": 1, "score": 1, "formula": "modified_fisher", "citation": { "id": "frontera-2006", "doi": "10.1227/01.NEU.0000218821.34014.1B", "pmid": "16823296", "title": "Prediction of symptomatic vasospasm after subarachnoid hemorrhage: the modified fisher scale", "source": "Neurosurgery. 2006;59(1):21-27", "authors": "Frontera JA, Claassen J, Schmidt JM, et al." }, "max_score": 4, "components": [ { "factor": "grade", "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.", "description": "Focal or diffuse, thin SAH, no IVH", "formula_expression": "Frontera 2006 modified Fisher CT grade 0-4 as assigned by the caller" } ] } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/modified-fisher-ct-grade-lookup-frontera-2006-4838277a/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)