# Webster Rating Scale (1968) Webster Rating Scale Status: LIVE Price: $0.005 USDC `GET /api/calc/webster` HTML: https://magentlab.com/docs/webster Markdown: https://magentlab.com/docs/webster.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Sum ten caller-assigned Webster 1968 items (each integer 0-3) and return the published 0-30 total. ## When to use When an agent has already assigned Webster 1968 integers 0-3 for the ten clinical items and needs the 0-30 total. magent does not examine the patient or diagnose Parkinson disease. ## When not to use - Not a medical device and not a Parkinson diagnosis. - Historical 1968 10-item 0-30 sum. Each item is a caller-assigned integer 0 (normal) to 3 (severe). magent does not examine the patient. - Not MDS-UPDRS. magent does not invent mild/moderate/severe total-score bands. ## Formula ``` Webster = bradykinesia + rigidity + posture + upper_extremity_swing + gait + tremor + facies + seborrhea + speech + self_care; each caller-assigned integer 0-3; max 30 ``` ## Citation [Critical analysis of the disability in Parkinson's disease](https://pubmed.ncbi.nlm.nih.gov/5655944) Webster DD Mod Treat. 1968;5(2):257-282 DOI: none ## Worked example ### All items 0 Given: `bradykinesia=0, facies=0, gait=0, posture=0, rigidity=0, seborrhea=0, self_care=0, speech=0, tremor=0, upper_extremity_swing=0` 1. bradykinesia 0 + rigidity 0 + posture 0 + upper_extremity_swing 0 + gait 0 + tremor 0 + facies 0 + seborrhea 0 + speech 0 + self_care 0 2. Score = 0 (max 30) ### All items 3 Given: `bradykinesia=3, facies=3, gait=3, posture=3, rigidity=3, seborrhea=3, self_care=3, speech=3, tremor=3, upper_extremity_swing=3` 1. bradykinesia 3 + rigidity 3 + posture 3 + upper_extremity_swing 3 + gait 3 + tremor 3 + facies 3 + seborrhea 3 + speech 3 + self_care 3 2. Score = 30 (max 30) ## Also searched as - Webster Rating Scale - Webster 1968 - Webster Parkinson's scale - Webster disability scale - Webster PD score - 10-item Webster scale - Webster 0-30 ## Parameters - `bradykinesia` (integer, required): Caller-assigned Webster 1968 item, integer 0 (normal) to 3 (severe). magent does not examine the patient. - `rigidity` (integer, required): Caller-assigned Webster 1968 item, integer 0 (normal) to 3 (severe). magent does not examine the patient. - `posture` (integer, required): Caller-assigned Webster 1968 item, integer 0 (normal) to 3 (severe). magent does not examine the patient. - `upper_extremity_swing` (integer, required): Caller-assigned Webster 1968 item, integer 0 (normal) to 3 (severe). magent does not examine the patient. - `gait` (integer, required): Caller-assigned Webster 1968 item, integer 0 (normal) to 3 (severe). magent does not examine the patient. - `tremor` (integer, required): Caller-assigned Webster 1968 item, integer 0 (normal) to 3 (severe). magent does not examine the patient. - `facies` (integer, required): Caller-assigned Webster 1968 item, integer 0 (normal) to 3 (severe). magent does not examine the patient. - `seborrhea` (integer, required): Caller-assigned Webster 1968 item, integer 0 (normal) to 3 (severe). magent does not examine the patient. - `speech` (integer, required): Caller-assigned Webster 1968 item, integer 0 (normal) to 3 (severe). magent does not examine the patient. - `self_care` (integer, required): Caller-assigned Webster 1968 item, integer 0 (normal) to 3 (severe). magent does not examine 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/webster` 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": [ { "bradykinesia": "0", "facies": "0", "gait": "0", "posture": "0", "rigidity": "0", "seborrhea": "0", "self_care": "0", "speech": "0", "tremor": "0", "upper_extremity_swing": "0" }, { "bradykinesia": "0", "facies": "0", "gait": "0", "posture": "0", "rigidity": "0", "seborrhea": "0", "self_care": "0", "speech": "0", "tremor": "0", "upper_extremity_swing": "0" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/webster Example 200: ```json { "count": 2, "path": "/api/calc/webster", "items": [ { "components": [ { "value": 0, "factor": "bradykinesia", "points": 0, "present": true }, { "value": 0, "factor": "rigidity", "points": 0, "present": true }, { "value": 0, "factor": "posture", "points": 0, "present": true }, { "value": 0, "factor": "upper_extremity_swing", "points": 0, "present": true }, { "value": 0, "factor": "gait", "points": 0, "present": true }, { "value": 0, "factor": "tremor", "points": 0, "present": true }, { "value": 0, "factor": "facies", "points": 0, "present": true }, { "value": 0, "factor": "seborrhea", "points": 0, "present": true }, { "value": 0, "factor": "speech", "points": 0, "present": true }, { "value": 0, "factor": "self_care", "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": "Webster DD", "id": "webster-1968", "pmid": "5655944", "source": "Mod Treat. 1968;5(2):257-282", "title": "Critical analysis of the disability in Parkinson's disease" }, "formula": "webster", "formula_expression": "Webster = bradykinesia + rigidity + posture + upper_extremity_swing + gait + tremor + facies + seborrhea + speech + self_care; each caller-assigned integer 0-3; max 30", "max_score": 30, "score": 0 }, { "components": [ { "value": 0, "factor": "bradykinesia", "points": 0, "present": true }, { "value": 0, "factor": "rigidity", "points": 0, "present": true }, { "value": 0, "factor": "posture", "points": 0, "present": true }, { "value": 0, "factor": "upper_extremity_swing", "points": 0, "present": true }, { "value": 0, "factor": "gait", "points": 0, "present": true }, { "value": 0, "factor": "tremor", "points": 0, "present": true }, { "value": 0, "factor": "facies", "points": 0, "present": true }, { "value": 0, "factor": "seborrhea", "points": 0, "present": true }, { "value": 0, "factor": "speech", "points": 0, "present": true }, { "value": 0, "factor": "self_care", "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": "Webster DD", "id": "webster-1968", "pmid": "5655944", "source": "Mod Treat. 1968;5(2):257-282", "title": "Critical analysis of the disability in Parkinson's disease" }, "formula": "webster", "formula_expression": "Webster = bradykinesia + rigidity + posture + upper_extremity_swing + gait + tremor + facies + seborrhea + speech + self_care; each caller-assigned integer 0-3; max 30", "max_score": 30, "score": 0 } ] } ``` ## Response fields - `formula` (string): webster - `formula_expression` (string): Exact expression used - `score` (integer): Webster 1968 points 0-30 - `max_score` (integer): Always 30 - `components` (array): Per-item caller-assigned points - `citation` (object): Webster Mod Treat 1968 citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "components": [ { "value": 0, "factor": "bradykinesia", "points": 0, "present": true }, { "value": 0, "factor": "rigidity", "points": 0, "present": true }, { "value": 0, "factor": "posture", "points": 0, "present": true }, { "value": 0, "factor": "upper_extremity_swing", "points": 0, "present": true }, { "value": 0, "factor": "gait", "points": 0, "present": true }, { "value": 0, "factor": "tremor", "points": 0, "present": true }, { "value": 0, "factor": "facies", "points": 0, "present": true }, { "value": 0, "factor": "seborrhea", "points": 0, "present": true }, { "value": 0, "factor": "speech", "points": 0, "present": true }, { "value": 0, "factor": "self_care", "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": "Webster DD", "id": "webster-1968", "pmid": "5655944", "source": "Mod Treat. 1968;5(2):257-282", "title": "Critical analysis of the disability in Parkinson's disease" }, "formula": "webster", "formula_expression": "Webster = bradykinesia + rigidity + posture + upper_extremity_swing + gait + tremor + facies + seborrhea + speech + self_care; each caller-assigned integer 0-3; max 30", "max_score": 30, "score": 0 } ``` ## Errors - HTTP 400 `invalid_webster`: Webster items must each be integers 0-3 as published in Webster 1968. 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 Hoehn and Yahr](https://magentlab.com/docs/modified-hoehn-yahr) — Echo the caller-assigned Goetz 2004 Table 1 modified Hoehn and Yahr stage (1.0, 1.5, 2.0, 2.5, 3.0, 4.0, or 5.0) with the published description. No stage 0. magent does not examine the patient. - [Schwab and England ADL](https://magentlab.com/docs/schwab-england) — Return the Schwab and England 1969 ADL percent 0-100 from a caller-assigned integer, with a stable label. ## 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.