# Barthel Index (Mahoney) Barthel Index Status: LIVE Price: $0.005 USDC `GET /api/calc/barthel` HTML: https://magentlab.com/docs/barthel Markdown: https://magentlab.com/docs/barthel.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Sum ten caller-assigned Mahoney 1965 Barthel Index item points and return the published 0-100 total. ## When to use When an agent has already assigned published Mahoney 1965 points for the ten Barthel activities and needs the 0-100 total. magent does not observe the patient or assign disability or placement. ## When not to use - Not a medical device and not a disability rating or placement decision. - Each of the ten items is a caller-assigned published point value from Mahoney 1965. magent does not observe the patient. - Original Mahoney/Barthel 1965 10-item index, 0-100 in fives. Not the Collin 0-20 Barthel. Score only; magent does not emit dependency bands. ## Formula ``` Barthel Index = feeding + bathing + grooming + dressing + bowels + bladder + toilet + transfers + mobility + stairs; Mahoney 1965 caller-assigned points; 0-100 in fives; max 100 ``` ## Citation [Functional evaluation: the Barthel Index](https://pubmed.ncbi.nlm.nih.gov/14258950) Mahoney FI, Barthel DW Md State Med J. 1965;14:61-65 DOI: none ## Worked example ### All items 0 Given: `bathing=0, bladder=0, bowels=0, dressing=0, feeding=0, grooming=0, mobility=0, stairs=0, toilet=0, transfers=0` 1. feeding 0 + bathing 0 + grooming 0 + dressing 0 + bowels 0 + bladder 0 + toilet 0 + transfers 0 + mobility 0 + stairs 0 2. Score = 0 (max 100) ### All independent Given: `bathing=5, bladder=10, bowels=10, dressing=10, feeding=10, grooming=5, mobility=15, stairs=10, toilet=10, transfers=15` 1. feeding 10 + bathing 5 + grooming 5 + dressing 10 + bowels 10 + bladder 10 + toilet 10 + transfers 15 + mobility 15 + stairs 10 2. Score = 100 (max 100) ## Also searched as - Barthel Index - Barthel score - Mahoney Barthel - Barthel ADL - Barthel 1965 - 10-item Barthel Index - Barthel Index 0-100 ## Parameters - `feeding` (integer, required): Caller-assigned Mahoney 1965 Barthel feeding points (integer 0, 5, or 10): 0 unable; 5 needs help; 10 independent. magent does not observe the patient. - `bathing` (integer, required): Caller-assigned Mahoney 1965 Barthel bathing points (integer 0 or 5): 0 dependent; 5 independent. magent does not observe the patient. - `grooming` (integer, required): Caller-assigned Mahoney 1965 Barthel grooming points (integer 0 or 5): 0 needs help; 5 independent. magent does not observe the patient. - `dressing` (integer, required): Caller-assigned Mahoney 1965 Barthel dressing points (integer 0, 5, or 10): 0 dependent; 5 needs help; 10 independent. magent does not observe the patient. - `bowels` (integer, required): Caller-assigned Mahoney 1965 Barthel bowels points (integer 0, 5, or 10): 0 incontinent; 5 occasional accident; 10 continent. magent does not observe the patient. - `bladder` (integer, required): Caller-assigned Mahoney 1965 Barthel bladder points (integer 0, 5, or 10): 0 incontinent or catheterized; 5 occasional accident; 10 continent. magent does not observe the patient. - `toilet` (integer, required): Caller-assigned Mahoney 1965 Barthel toilet points (integer 0, 5, or 10): 0 dependent; 5 needs help; 10 independent. magent does not observe the patient. - `transfers` (integer, required): Caller-assigned Mahoney 1965 Barthel transfers points (integer 0, 5, 10, or 15): 0 unable; 5 major help; 10 minor help; 15 independent. magent does not observe the patient. - `mobility` (integer, required): Caller-assigned Mahoney 1965 Barthel mobility points (integer 0, 5, 10, or 15): 0 immobile; 5 wheelchair independent; 10 walks with help; 15 independent. magent does not observe the patient. - `stairs` (integer, required): Caller-assigned Mahoney 1965 Barthel stairs points (integer 0, 5, or 10): 0 unable; 5 needs help; 10 independent. magent does not observe the patient. ## 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/barthel` 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": [ { "bathing": "0", "bladder": "0", "bowels": "0", "dressing": "0", "feeding": "0", "grooming": "0", "mobility": "0", "stairs": "0", "toilet": "0", "transfers": "0" }, { "bathing": "0", "bladder": "0", "bowels": "0", "dressing": "0", "feeding": "0", "grooming": "0", "mobility": "0", "stairs": "0", "toilet": "0", "transfers": "0" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/barthel Example 200: ```json { "count": 2, "path": "/api/calc/barthel", "items": [ { "components": [ { "value": 0, "factor": "feeding", "points": 0, "present": true }, { "value": 0, "factor": "bathing", "points": 0, "present": true }, { "value": 0, "factor": "grooming", "points": 0, "present": true }, { "value": 0, "factor": "dressing", "points": 0, "present": true }, { "value": 0, "factor": "bowels", "points": 0, "present": true }, { "value": 0, "factor": "bladder", "points": 0, "present": true }, { "value": 0, "factor": "toilet", "points": 0, "present": true }, { "value": 0, "factor": "transfers", "points": 0, "present": true }, { "value": 0, "factor": "mobility", "points": 0, "present": true }, { "value": 0, "factor": "stairs", "points": 0, "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": "Mahoney FI, Barthel DW", "id": "mahoney-1965", "pmid": "14258950", "source": "Md State Med J. 1965;14:61-65", "title": "Functional evaluation: the Barthel Index" }, "formula": "barthel", "formula_expression": "Barthel Index = feeding + bathing + grooming + dressing + bowels + bladder + toilet + transfers + mobility + stairs; Mahoney 1965 caller-assigned points; 0-100 in fives; max 100", "max_score": 100, "score": 0 }, { "components": [ { "value": 0, "factor": "feeding", "points": 0, "present": true }, { "value": 0, "factor": "bathing", "points": 0, "present": true }, { "value": 0, "factor": "grooming", "points": 0, "present": true }, { "value": 0, "factor": "dressing", "points": 0, "present": true }, { "value": 0, "factor": "bowels", "points": 0, "present": true }, { "value": 0, "factor": "bladder", "points": 0, "present": true }, { "value": 0, "factor": "toilet", "points": 0, "present": true }, { "value": 0, "factor": "transfers", "points": 0, "present": true }, { "value": 0, "factor": "mobility", "points": 0, "present": true }, { "value": 0, "factor": "stairs", "points": 0, "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": "Mahoney FI, Barthel DW", "id": "mahoney-1965", "pmid": "14258950", "source": "Md State Med J. 1965;14:61-65", "title": "Functional evaluation: the Barthel Index" }, "formula": "barthel", "formula_expression": "Barthel Index = feeding + bathing + grooming + dressing + bowels + bladder + toilet + transfers + mobility + stairs; Mahoney 1965 caller-assigned points; 0-100 in fives; max 100", "max_score": 100, "score": 0 } ] } ``` ## Response fields - `formula` (string): barthel - `formula_expression` (string): Exact expression used - `score` (integer): Barthel Index points 0-100 in fives - `max_score` (integer): Always 100 - `components` (array): Per-item caller-assigned points - `citation` (object): Mahoney and Barthel Md State Med J 1965 citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "components": [ { "value": 0, "factor": "feeding", "points": 0, "present": true }, { "value": 0, "factor": "bathing", "points": 0, "present": true }, { "value": 0, "factor": "grooming", "points": 0, "present": true }, { "value": 0, "factor": "dressing", "points": 0, "present": true }, { "value": 0, "factor": "bowels", "points": 0, "present": true }, { "value": 0, "factor": "bladder", "points": 0, "present": true }, { "value": 0, "factor": "toilet", "points": 0, "present": true }, { "value": 0, "factor": "transfers", "points": 0, "present": true }, { "value": 0, "factor": "mobility", "points": 0, "present": true }, { "value": 0, "factor": "stairs", "points": 0, "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": "Mahoney FI, Barthel DW", "id": "mahoney-1965", "pmid": "14258950", "source": "Md State Med J. 1965;14:61-65", "title": "Functional evaluation: the Barthel Index" }, "formula": "barthel", "formula_expression": "Barthel Index = feeding + bathing + grooming + dressing + bowels + bladder + toilet + transfers + mobility + stairs; Mahoney 1965 caller-assigned points; 0-100 in fives; max 100", "max_score": 100, "score": 0 } ``` ## Errors - HTTP 400 `invalid_barthel`: each Barthel 1965 item must be a published point value for that activity (0/5, 0/5/10, or 0/5/10/15). 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 - [Modified Rankin](https://magentlab.com/docs/modified-rankin) — Return the van Swieten 1988 modified Rankin handicap grade 0-5 from a caller-assigned integer, with the published grade wording. ## 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 of accepted and payload). Magent attaches canonical extensions.bazaar on CDP verify/settle; echoing 402 bazaar is optional. - 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. HTTP 402 never includes the tool JSON. - 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.