# FUNC score FUNC score Status: LIVE Price: $0.005 USDC `GET /api/calc/func_score` HTML: https://magentlab.com/docs/func-score Markdown: https://magentlab.com/docs/func-score.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Compute the Rost 2008 FUNC score from caller-assigned ICH volume, age, location, GCS, and pre-ICH cognitive impairment. ## When to use When an agent needs the published FUNC total and 90-day functional-independence band and must not invent volume, location, GCS, or pre-ICH cognition from a CT scan or chart narrative. ## When not to use - Not a diagnosis and not a withdrawal-of-care protocol. - Companion to the Hemphill ICH Score (30-day mortality), not a replacement. - The caller assigns ICH volume, location, GCS, and pre-ICH cognitive impairment. magent does not read a CT scan or examine the patient. - Rost 2008 reported observed 90-day functional independence (Glasgow Outcome Scale ≥4) of 0% (FUNC 0-4), 29% (5-7), 48% (8), 75% (9-10), and 95% (FUNC 11) in the published band table. Those are cohort proportions, not a care recommendation. - The JSON response is score, max_score 11, and func_band. It does not include a percent independence table. ## Formula ``` FUNC = ich_volume + age + location + gcs + pre_ich_cognitive_impairment; volume <30 → 4, 30-60 → 2, >60 → 0; age <70 → 2, 70-79 → 1, >=80 → 0; lobar 2, deep 1, infratentorial 0; GCS >=9 → 2, <=8 → 0; pre-ICH cognitive impairment absent 1, present 0; max 11 ``` ## Citation [Prediction of functional outcome in patients with primary intracerebral hemorrhage: the FUNC score](https://doi.org/10.1161/STROKEAHA.107.512202) Rost NS, Smith EE, Chang Y, et al. Stroke. 2008;39(8):2304-2309 DOI: [10.1161/STROKEAHA.107.512202](https://doi.org/10.1161/STROKEAHA.107.512202) ## Worked example ### Lobar ICH, small volume, GCS 14 Given: `age=60, gcs=14, ich_volume_ml=15, location=lobar, pre_ich_cognitive_impairment=false` 1. Volume 15 mL is <30 → 4; age 60 is <70 → 2; location lobar → 2 2. GCS 14 is ≥9 → 2; pre-ICH cognitive impairment absent → 1 3. Score = 11 (max 11), func_band 11 ### Large infratentorial ICH, GCS 8, cognitive impairment Given: `age=80, gcs=8, ich_volume_ml=70, location=infratentorial, pre_ich_cognitive_impairment=true` 1. Volume 70 mL is >60 → 0; age 80 is ≥80 → 0; location infratentorial → 0 2. GCS 8 is ≤8 → 0; pre-ICH cognitive impairment present → 0 3. Score = 0 (max 11), func_band 0-4 ## Also searched as - FUNC score - FUNC ICH score - Rost FUNC - ICH functional outcome score - primary ICH FUNC - Rost 2008 FUNC - functional independence ICH score - FUNC 90-day ICH ## Parameters - `ich_volume_ml` (number, required): ICH volume in mL (cm^3 in Rost 2008). Number from 0.1 to 300. <30 scores 4; 30-60 scores 2; >60 scores 0. magent does not measure volume from imaging. - `age` (integer, required): Age in years (18-120). <70 scores 2; 70-79 scores 1; ≥80 scores 0. - `location` (string, required): ICH location as assigned by the caller: lobar (2), deep (1), or infratentorial (0). magent does not read a CT scan. - `gcs` (integer, required): Caller-assigned GCS total (integer 3-15). ≥9 scores 2; ≤8 scores 0. magent does not compute GCS from eye, verbal, and motor here. - `pre_ich_cognitive_impairment` (boolean, required): Pre-ICH cognitive impairment as assigned by the caller. true or false. Absent (false) scores 1; present (true) scores 0. ## Bulk (POST) POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement. Method: `POST /api/calc/func_score` Max items: 25 Price: unit_amount + extra_item_amount * (n - 1) (unit 5000 atomic, extra 2000 atomic) Status: PREVIEW - 1 to 25 items. Each item uses the same keys as the GET query parameters. - POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows. - The first invalid item fails the whole request (index in the 400 JSON). You are not charged. - HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row. - Catalog misses (empty matches, found=false) stay paid 200s inside that slot. - x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items. Example request: ```json { "items": [ { "age": "60", "gcs": "14", "ich_volume_ml": "15", "location": "lobar", "pre_ich_cognitive_impairment": "false" }, { "age": "60", "gcs": "14", "ich_volume_ml": "15", "location": "lobar", "pre_ich_cognitive_impairment": "false" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/func-score Example 200: ```json { "count": 2, "path": "/api/calc/func_score", "items": [ { "location": "lobar", "components": [ { "value": 15.0, "factor": "ich_volume_ml", "points": 4, "present": true }, { "value": 60, "factor": "age", "points": 2, "present": true }, { "value": "lobar", "factor": "location", "points": 2, "present": true }, { "value": 14, "factor": "gcs", "points": 2, "present": true }, { "value": false, "factor": "pre_ich_cognitive_impairment", "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.", "citation": { "authors": "Rost NS, Smith EE, Chang Y, et al.", "doi": "10.1161/STROKEAHA.107.512202", "id": "rost-2008", "pmid": "18556582", "source": "Stroke. 2008;39(8):2304-2309", "title": "Prediction of functional outcome in patients with primary intracerebral hemorrhage: the FUNC score" }, "formula": "func_score", "formula_expression": "FUNC = ich_volume + age + location + gcs + pre_ich_cognitive_impairment; volume <30 → 4, 30-60 → 2, >60 → 0; age <70 → 2, 70-79 → 1, >=80 → 0; lobar 2, deep 1, infratentorial 0; GCS >=9 → 2, <=8 → 0; pre-ICH cognitive impairment absent 1, present 0; max 11", "max_score": 11, "score": 11, "age_years": 60, "func_band": "11", "gcs": 14, "ich_volume_ml": 15.0, "pre_ich_cognitive_impairment": false }, { "location": "lobar", "components": [ { "value": 15.0, "factor": "ich_volume_ml", "points": 4, "present": true }, { "value": 60, "factor": "age", "points": 2, "present": true }, { "value": "lobar", "factor": "location", "points": 2, "present": true }, { "value": 14, "factor": "gcs", "points": 2, "present": true }, { "value": false, "factor": "pre_ich_cognitive_impairment", "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.", "citation": { "authors": "Rost NS, Smith EE, Chang Y, et al.", "doi": "10.1161/STROKEAHA.107.512202", "id": "rost-2008", "pmid": "18556582", "source": "Stroke. 2008;39(8):2304-2309", "title": "Prediction of functional outcome in patients with primary intracerebral hemorrhage: the FUNC score" }, "formula": "func_score", "formula_expression": "FUNC = ich_volume + age + location + gcs + pre_ich_cognitive_impairment; volume <30 → 4, 30-60 → 2, >60 → 0; age <70 → 2, 70-79 → 1, >=80 → 0; lobar 2, deep 1, infratentorial 0; GCS >=9 → 2, <=8 → 0; pre-ICH cognitive impairment absent 1, present 0; max 11", "max_score": 11, "score": 11, "age_years": 60, "func_band": "11", "gcs": 14, "ich_volume_ml": 15.0, "pre_ich_cognitive_impairment": false } ] } ``` ## Response fields - `formula` (string): func_score - `formula_expression` (string): Exact expression used - `score` (integer): Total points 0-11 - `max_score` (integer): Always 11 - `func_band` (string): Rost 2008 band: 0-4, 5-7, 8, 9-10, or 11 - `gcs` (integer): Caller-assigned GCS total used for the ≥9 / ≤8 split - `age_years` (integer): Age used for the <70 / 70-79 / ≥80 bands - `ich_volume_ml` (number): ICH volume in mL used for the <30 / 30-60 / >60 bands - `location` (string): Caller-assigned location: lobar, deep, or infratentorial - `pre_ich_cognitive_impairment` (boolean): Caller-assigned pre-ICH cognitive impairment flag - `components` (array): Per-item points - `citation` (object): Rost 2008 citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "location": "lobar", "components": [ { "value": 15.0, "factor": "ich_volume_ml", "points": 4, "present": true }, { "value": 60, "factor": "age", "points": 2, "present": true }, { "value": "lobar", "factor": "location", "points": 2, "present": true }, { "value": 14, "factor": "gcs", "points": 2, "present": true }, { "value": false, "factor": "pre_ich_cognitive_impairment", "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.", "citation": { "authors": "Rost NS, Smith EE, Chang Y, et al.", "doi": "10.1161/STROKEAHA.107.512202", "id": "rost-2008", "pmid": "18556582", "source": "Stroke. 2008;39(8):2304-2309", "title": "Prediction of functional outcome in patients with primary intracerebral hemorrhage: the FUNC score" }, "formula": "func_score", "formula_expression": "FUNC = ich_volume + age + location + gcs + pre_ich_cognitive_impairment; volume <30 → 4, 30-60 → 2, >60 → 0; age <70 → 2, 70-79 → 1, >=80 → 0; lobar 2, deep 1, infratentorial 0; GCS >=9 → 2, <=8 → 0; pre-ICH cognitive impairment absent 1, present 0; max 11", "max_score": 11, "score": 11, "age_years": 60, "func_band": "11", "gcs": 14, "ich_volume_ml": 15.0, "pre_ich_cognitive_impairment": false } ``` ## Errors - HTTP 400 `invalid_ich_volume`: ich_volume_ml must be a number from 0.1 to 300. Returned before settlement; you are not charged. - HTTP 400 `invalid_age`: age must be an integer from 18 to 120 Returned before settlement; you are not charged. - HTTP 400 `invalid_func_location`: location must be lobar, deep, or infratentorial (Rost 2008). Returned before settlement; you are not charged. - HTTP 400 `invalid_gcs_total`: gcs must be an integer from 3 to 15. Returned before settlement; you are not charged. - HTTP 400 `invalid_flag`: boolean clinical flags must be true or false Returned before settlement; you are not charged. - HTTP 400 `invalid_items`: POST body must be a JSON object with only an items array Returned before settlement; you are not charged. - HTTP 400 `invalid_item_count`: items must be an array of 1 to 25 objects Returned before settlement; you are not charged. - HTTP 400 `invalid_item`: each items entry must be a JSON object Returned before settlement; you are not charged. Shared HTTP 402 and 503: https://magentlab.com/docs/payments ## Related tools - [ICH Score](https://magentlab.com/docs/ich-score) — Compute the Hemphill 2001 ICH Score from caller-assigned GCS, age, infratentorial origin, ICH volume, and IVH. - [ABC/2](https://magentlab.com/docs/abc2) — Compute the Kothari 1996 ABC/2 ellipsoid ICH volume as (a_cm × b_cm × c_cm) / 2 from caller-supplied diameters in centimeters. - [Glasgow Coma Scale](https://magentlab.com/docs/gcs) — Compute the Glasgow Coma Scale as the sum of caller-assigned eye, verbal, and motor integers. The 1974 or 1976 edition is required. ## Payment Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s. - GET the tool with Accept: application/json (do not send Accept: text/html unless you want the human paywall). - HTTP 402 means you have not paid. Decode the base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote. - Sign accepts[0] (exact, EIP-3009) with validBefore = now + maxTimeoutSeconds (600 seconds), or accepts[1] (batch-settlement deposit/voucher) on product GET. Ping and POST {items} stay exact. Magent retries transient facilitator 429/5xx before answering. - Retry the same URL with PAYMENT-SIGNATURE (base64 JSON echoing accepted, payload, and extensions when present). - Success is HTTP 200 JSON plus PAYMENT-RESPONSE. exact settles before the tool. batch-settlement verifies (and deposit-settles) before the tool and commits the charge after HTTP 2xx. HTTP 503: retry the same PAYMENT-SIGNATURE. Mint a new exact nonce only after a new HTTP 402. - offered `exact` on eip155:8453: Fixed-price USDC on Base. The buyer authorizes the advertised amount (EIP-3009). magent settles before the tool runs (paymentFlow upfront). extra.assetTransferMethod=eip3009 extra.paymentFlow=upfront. - offered `batch-settlement` on eip155:8453: Payment-channel vouchers claimed later in batches. Exact stays accepts[0]. Same-path POST {items} is still exact. extra.assetTransferMethod=eip3009 extra.paymentFlow=authorization. - not offered `upto`: Not offered. Usage-based: buyer authorizes a ceiling, seller settles the actual amount after work. Reserved for a future metered tool. Not for current calculators or code search. Same-path POST {items} is still scheme exact: one EIP-3009 authorization for GET unit plus $0.002 per extra item. That is not x402 batch-settlement (payment channels / vouchers). Shared HTTP 402 and 503 table: https://magentlab.com/docs/payments Stdio MCP (one process per host): https://magentlab.com/docs/mcp ## Guarantees - HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged. - exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE. - HTTP 402 is unpaid only. Do not sign a second authorization because of a 503. - Execution is timeout-bounded and concurrency-capped. - Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.