Health

NIH Stroke Scale (NIHSS)

Calculate the NIH Stroke Scale (NIHSS) to quantify acute stroke neurologic deficit across 11 categories (15 scored items, with left & right limb motor graded separately). Items: 1a Level of consciousness (0–3), 1b LOC questions (0–2), 1c LOC commands (0–2), 2 Best gaze (0–2), 3 Visual fields (0–3), 4 Facial palsy (0–3), 5a/5b Motor arm left/right (0–4 each), 6a/6b Motor leg left/right (0–4 each), 7 Limb ataxia (0–2), 8 Sensory (0–2), 9 Best language (0–3), 10 Dysarthria (0–2), 11 Extinction/inattention (0–2). Both left and right limb motor scores are summed into the total (standard NIHSS); the tool also reports the more-affected side (max of left/right) for clinical context. Range 0–42; higher = more severe. Interpretation: 0 no symptoms, 1–4 minor, 5–15 moderate, 16–20 moderate-to-severe, 21–42 severe. Derived from Brott et al. 1989 (Stroke) and NINDS instructions. Scoring reliability is examiner-dependent and should be performed by trained personnel. Not medical advice.

json· JSON resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/nihss-score' \
  -H 'Content-Type: application/json' \
  -d '{"loc":"1","locQuestions":"1","locCommands":"1","gaze":"2","visual":"2","facialPalsy":"2","motorArmLeft":"0","motorArmRight":"2","motorLegLeft":"0","motorLegRight":"2","ataxia":"0","sensory":"1","language":"0","dysarthria":"1","extinction":"1"}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/nihss-score

Parameters

Name	Type	Required	Description
loc	select	Yes	0 = alert; 3 = unresponsive.
locQuestions	select	Yes	Ask the month and the patient's age. 0 = both correct; 2 = neither correct.
locCommands	select	Yes	Open/close eyes and grip/non-grip hand. 0 = both correct; 2 = neither.
gaze	select	Yes	Test horizontal eye movement. 0 = normal; 2 = forced deviation / total paresis.
visual	select	Yes	Confrontation testing. 0 = no loss; 3 = bilateral hemianopia / blind.
facialPalsy	select	Yes	0 = normal symmetry; 3 = complete unilateral/bilateral paralysis.
motorArmLeft	select	Yes	Drift test, left arm. 0 = no drift; 4 = no movement.
motorArmRight	select	Yes	Drift test, right arm. 0 = no drift; 4 = no movement.
motorLegLeft	select	Yes	Drift test, left leg. 0 = no drift; 4 = no movement.
motorLegRight	select	Yes	Drift test, right leg. 0 = no drift; 4 = no movement.
ataxia	select	Yes	Finger-nose / heel-shin. 0 = absent; 2 = present in two limbs.
sensory	select	Yes	Pinprick on face, arm, trunk, leg. 0 = normal; 2 = severe-to-total loss.
language	select	Yes	Naming, read list, describe picture. 0 = no aphasia; 3 = mute / global aphasia.
dysarthria	select	Yes	Read/repeat words. 0 = normal articulation; 2 = severe/unintelligible or mute.
extinction	select	Yes	Double simultaneous stimulation. 0 = no neglect; 2 = complete neglect (two modalities).

Response format

JSON result

JSON

{
  "key": {...},
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-nihss-score": {
      "name": "nihss-score",
      "description": "Calculate the NIH Stroke Scale (NIHSS) to quantify acute stroke neurologic deficit across 11 categories (15 scored items, with left & right limb motor graded separately). Items: 1a Level of consciousness (0–3), 1b LOC questions (0–2), 1c LOC commands (0–2), 2 Best gaze (0–2), 3 Visual fields (0–3), 4 Facial palsy (0–3), 5a/5b Motor arm left/right (0–4 each), 6a/6b Motor leg left/right (0–4 each), 7 Limb ataxia (0–2), 8 Sensory (0–2), 9 Best language (0–3), 10 Dysarthria (0–2), 11 Extinction/inattention (0–2). Both left and right limb motor scores are summed into the total (standard NIHSS); the tool also reports the more-affected side (max of left/right) for clinical context. Range 0–42; higher = more severe. Interpretation: 0 no symptoms, 1–4 minor, 5–15 moderate, 16–20 moderate-to-severe, 21–42 severe. Derived from Brott et al. 1989 (Stroke) and NINDS instructions. Scoring reliability is examiner-dependent and should be performed by trained personnel. Not medical advice.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=nihss-score",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "nihss-score",
    "arguments": {
  "loc": "1",
  "locQuestions": "1",
  "locCommands": "1",
  "gaze": "2",
  "visual": "2",
  "facialPalsy": "2",
  "motorArmLeft": "0",
  "motorArmRight": "2",
  "motorLegLeft": "0",
  "motorLegRight": "2",
  "ataxia": "0",
  "sensory": "1",
  "language": "0",
  "dysarthria": "1",
  "extinction": "1"
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]