# AMT-10 abbreviated mental test (Hodkinson) AMT-10 Status: LIVE Price: $0.005 USDC `GET /api/calc/amt_10` HTML: https://magentlab.com/docs/amt-10 Markdown: https://magentlab.com/docs/amt-10.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Sum the ten Hodkinson 1972 AMT-10 items from caller-assigned correct/incorrect flags and return the 0–10 total. Hodkinson 1972 did not publish a diagnostic cutoff. ## When to use When an agent already has AMT-10 items assigned as correct or incorrect and needs the published 0–10 total, not a dementia diagnosis, not an invented cutoff, and not Swain 1997 AMT-4. ## When not to use - Not a medical device and not a dementia diagnosis. magent does not interview the patient. - Each item is a caller-assigned boolean. This API does not collect an age, date of birth, place name, year, address, or monarch name. - Hodkinson 1972 abbreviated the 26-item test to 10 questions and did not publish a diagnostic cutoff. This tool returns the 0–10 sum only. - This is Hodkinson 1972 AMT-10 only. It is not Swain 1997 AMT-4. ## Formula ``` AMT-10 = age_correct + time_correct + address_recall_correct + year_correct + place_correct + two_persons_correct + dob_correct + world_war_start_correct + monarch_correct + count_backwards_20_correct; each 1 if true; max 10 (Hodkinson 1972) ``` ## Citation [Evaluation of a mental test score for assessment of mental impairment in the elderly](https://doi.org/10.1093/ageing/1.4.233) Hodkinson HM Age Ageing. 1972;1(4):233-238 DOI: [10.1093/ageing/1.4.233](https://doi.org/10.1093/ageing/1.4.233) ## Worked example ### All ten items correct Given: `address_recall_correct=true, age_correct=true, count_backwards_20_correct=true, dob_correct=true, monarch_correct=true, place_correct=true, time_correct=true, two_persons_correct=true, world_war_start_correct=true, year_correct=true` 1. all ten caller-assigned flags are true 2. Score = 10 (max 10); Hodkinson 1972 does not publish a cutoff ### Date of birth incorrect, other items correct Given: `address_recall_correct=true, age_correct=true, count_backwards_20_correct=true, dob_correct=false, monarch_correct=true, place_correct=true, time_correct=true, two_persons_correct=true, world_war_start_correct=true, year_correct=true` 1. dob_correct false → 0; the other nine items true → 1 each 2. Score = 9 (max 10) ## Also searched as - AMT-10 - Abbreviated Mental Test 10 - Hodkinson AMT-10 - AMT10 - ten-item abbreviated mental test - Hodkinson 1972 AMT - abbreviated mental test score - AMT-10 cognitive screen - Hodkinson mental test ## Parameters - `age_correct` (boolean, required): Caller-assigned flag: age stated correctly (Hodkinson 1972 AMT-10). true scores 1; false scores 0. magent does not interview the patient and does not collect an age. - `time_correct` (boolean, required): Caller-assigned flag: time to the nearest hour stated correctly (Hodkinson 1972 AMT-10). true scores 1; false scores 0. magent does not collect a clock time. - `address_recall_correct` (boolean, required): Caller-assigned flag: address recall at the end of the test (Hodkinson 1972 AMT-10; the classic 42 West Street prompt is assigned by the caller). true scores 1; false scores 0. magent does not collect an address. - `year_correct` (boolean, required): Caller-assigned flag: current year stated correctly (Hodkinson 1972 AMT-10). true scores 1; false scores 0. magent does not collect a year. - `place_correct` (boolean, required): Caller-assigned flag: name of place / hospital stated correctly (Hodkinson 1972 AMT-10). true scores 1; false scores 0. magent does not collect a place name. - `two_persons_correct` (boolean, required): Caller-assigned flag: recognition of two persons (Hodkinson 1972 AMT-10). true scores 1; false scores 0. magent does not interview the patient. - `dob_correct` (boolean, required): Caller-assigned flag: date of birth stated correctly (Hodkinson 1972 AMT-10). true scores 1; false scores 0. magent does not collect a date of birth. - `world_war_start_correct` (boolean, required): Caller-assigned flag: year the First World War started stated correctly (Hodkinson 1972 AMT-10). true scores 1; false scores 0. magent does not collect a year. - `monarch_correct` (boolean, required): Caller-assigned flag: name of the present monarch stated correctly (Hodkinson 1972 AMT-10). true scores 1; false scores 0. magent does not collect a monarch name. - `count_backwards_20_correct` (boolean, required): Caller-assigned flag: count backwards from 20 to 1 (Hodkinson 1972 AMT-10). true scores 1; false scores 0. magent does not interview 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/amt_10` 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": [ { "address_recall_correct": "true", "age_correct": "true", "count_backwards_20_correct": "true", "dob_correct": "true", "monarch_correct": "true", "place_correct": "true", "time_correct": "true", "two_persons_correct": "true", "world_war_start_correct": "true", "year_correct": "true" }, { "address_recall_correct": "true", "age_correct": "true", "count_backwards_20_correct": "true", "dob_correct": "true", "monarch_correct": "true", "place_correct": "true", "time_correct": "true", "two_persons_correct": "true", "world_war_start_correct": "true", "year_correct": "true" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/amt-10 Example 200: ```json { "count": 2, "path": "/api/calc/amt_10", "items": [ { "components": [ { "factor": "age_correct", "points": 1, "present": true }, { "factor": "time_correct", "points": 1, "present": true }, { "factor": "address_recall_correct", "points": 1, "present": true }, { "factor": "year_correct", "points": 1, "present": true }, { "factor": "place_correct", "points": 1, "present": true }, { "factor": "two_persons_correct", "points": 1, "present": true }, { "factor": "dob_correct", "points": 1, "present": true }, { "factor": "world_war_start_correct", "points": 1, "present": true }, { "factor": "monarch_correct", "points": 1, "present": true }, { "factor": "count_backwards_20_correct", "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": "Hodkinson HM", "doi": "10.1093/ageing/1.4.233", "id": "hodkinson-1972", "pmid": "4669880", "source": "Age Ageing. 1972;1(4):233-238", "title": "Evaluation of a mental test score for assessment of mental impairment in the elderly" }, "formula": "amt_10", "formula_expression": "AMT-10 = age_correct + time_correct + address_recall_correct + year_correct + place_correct + two_persons_correct + dob_correct + world_war_start_correct + monarch_correct + count_backwards_20_correct; each 1 if true; max 10 (Hodkinson 1972)", "max_score": 10, "score": 10 }, { "components": [ { "factor": "age_correct", "points": 1, "present": true }, { "factor": "time_correct", "points": 1, "present": true }, { "factor": "address_recall_correct", "points": 1, "present": true }, { "factor": "year_correct", "points": 1, "present": true }, { "factor": "place_correct", "points": 1, "present": true }, { "factor": "two_persons_correct", "points": 1, "present": true }, { "factor": "dob_correct", "points": 1, "present": true }, { "factor": "world_war_start_correct", "points": 1, "present": true }, { "factor": "monarch_correct", "points": 1, "present": true }, { "factor": "count_backwards_20_correct", "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": "Hodkinson HM", "doi": "10.1093/ageing/1.4.233", "id": "hodkinson-1972", "pmid": "4669880", "source": "Age Ageing. 1972;1(4):233-238", "title": "Evaluation of a mental test score for assessment of mental impairment in the elderly" }, "formula": "amt_10", "formula_expression": "AMT-10 = age_correct + time_correct + address_recall_correct + year_correct + place_correct + two_persons_correct + dob_correct + world_war_start_correct + monarch_correct + count_backwards_20_correct; each 1 if true; max 10 (Hodkinson 1972)", "max_score": 10, "score": 10 } ] } ``` ## Response fields - `formula` (string): amt_10 - `formula_expression` (string): Exact expression used - `score` (integer): AMT-10 points 0-10 (Hodkinson 1972) - `max_score` (integer): Always 10 - `components` (array): Per-item points - `citation` (object): Hodkinson 1972 Age Ageing citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "components": [ { "factor": "age_correct", "points": 1, "present": true }, { "factor": "time_correct", "points": 1, "present": true }, { "factor": "address_recall_correct", "points": 1, "present": true }, { "factor": "year_correct", "points": 1, "present": true }, { "factor": "place_correct", "points": 1, "present": true }, { "factor": "two_persons_correct", "points": 1, "present": true }, { "factor": "dob_correct", "points": 1, "present": true }, { "factor": "world_war_start_correct", "points": 1, "present": true }, { "factor": "monarch_correct", "points": 1, "present": true }, { "factor": "count_backwards_20_correct", "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": "Hodkinson HM", "doi": "10.1093/ageing/1.4.233", "id": "hodkinson-1972", "pmid": "4669880", "source": "Age Ageing. 1972;1(4):233-238", "title": "Evaluation of a mental test score for assessment of mental impairment in the elderly" }, "formula": "amt_10", "formula_expression": "AMT-10 = age_correct + time_correct + address_recall_correct + year_correct + place_correct + two_persons_correct + dob_correct + world_war_start_correct + monarch_correct + count_backwards_20_correct; each 1 if true; max 10 (Hodkinson 1972)", "max_score": 10, "score": 10 } ``` ## Errors - 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 - [AMT-4](https://magentlab.com/docs/amt-4) — Sum the four Swain 1997 AMT-4 items from caller-assigned correct/incorrect flags and return whether the score is less than 4 (impaired). - [4AT](https://magentlab.com/docs/4at) — Sum the Bellelli 2014 4AT items and return unlikely (0), possible cognitive impairment (1–3), or possible delirium (≥4). - [CAM-ICU](https://magentlab.com/docs/cam-icu) — Apply the Ely 2001 CAM-ICU algorithm and return whether delirium is present from four caller-assigned features. ## 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.