# Migraine Disability Assessment (MIDAS) MIDAS Status: LIVE Price: $0.005 USDC `GET /api/calc/midas` HTML: https://magentlab.com/docs/midas Markdown: https://magentlab.com/docs/midas.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Sum five caller-assigned MIDAS day counts over the last 3 months and return the 0-450 total and published grades I–IV. ## When to use When an agent has already assigned the five 3-month day counts and needs the published MIDAS total and grade, not a migraine diagnosis, treatment order, GAD-7, or PHQ-9. ## When not to use - Not a medical device and not a migraine diagnosis. - missed_work_days, reduced_work_days, missed_household_days, reduced_household_days, and missed_social_days are caller-assigned integers 0-90 for the last 3 months. magent does not assign the counts or de-duplicate reduced days from missed days. - magent does not include MIDAS questions A (headache days) or B (pain 0-10) in the score. - Published grades used with this instrument: Grade I 0-5 little/minimal, Grade II 6-10 mild, Grade III 11-20 moderate, Grade IV ≥21 severe. Not a triptan or prophylaxis treatment order. Not GAD-7. Not PHQ-9. ## Formula ``` MIDAS = missed_work_days + reduced_work_days + missed_household_days + reduced_household_days + missed_social_days; each caller-assigned integer 0-90 (last 3 months); max 450; magent does not include questions A or B; grades I 0-5 little/minimal, II 6-10 mild, III 11-20 moderate, IV ≥21 severe ``` ## Citation [An international study to assess reliability of the Migraine Disability Assessment (MIDAS) score](https://doi.org/10.1212/wnl.53.5.988) Stewart WF, Lipton RB, Whyte J, Dowson A, Kolodner A, Liberman JN, Sawyer J Neurology. 1999;53(5):988-994 DOI: [10.1212/wnl.53.5.988](https://doi.org/10.1212/wnl.53.5.988) ## Worked example ### All day counts 0 Given: `missed_household_days=0, missed_social_days=0, missed_work_days=0, reduced_household_days=0, reduced_work_days=0` 1. missed_work_days 0 + reduced_work_days 0 + missed_household_days 0 + reduced_household_days 0 + missed_social_days 0 2. Score = 0 (max 450); midas_grade I (little/minimal) ### Worked example score 12 Given: `missed_household_days=3, missed_social_days=3, missed_work_days=2, reduced_household_days=2, reduced_work_days=2` 1. missed_work_days 2 + reduced_work_days 2 + missed_household_days 3 + reduced_household_days 2 + missed_social_days 3 2. Score = 12 (max 450); midas_grade III (moderate) ### Grade IV cut at 21 Given: `missed_household_days=0, missed_social_days=0, missed_work_days=21, reduced_household_days=0, reduced_work_days=0` 1. missed_work_days 21 + reduced_work_days 0 + missed_household_days 0 + reduced_household_days 0 + missed_social_days 0 2. Score = 21 (max 450); midas_grade IV (severe) ## Also searched as - MIDAS - Migraine Disability Assessment - MIDAS score - Stewart MIDAS - migraine disability - MIDAS grade - headache disability days ## Parameters - `missed_work_days` (integer, required): Caller-assigned MIDAS item 1 (integer 0-90): days of missed paid work or school in the last 3 months. magent does not assign the count. - `reduced_work_days` (integer, required): Caller-assigned MIDAS item 2 (integer 0-90): days work or school productivity was reduced by half or more in the last 3 months. Do not double-count days already in missed_work_days; the caller assigns the count. magent does not de-duplicate days. - `missed_household_days` (integer, required): Caller-assigned MIDAS item 3 (integer 0-90): days household work was not done in the last 3 months. magent does not assign the count. - `reduced_household_days` (integer, required): Caller-assigned MIDAS item 4 (integer 0-90): days household productivity was reduced by half or more in the last 3 months. Do not double-count days already in missed_household_days; the caller assigns the count. magent does not de-duplicate days. - `missed_social_days` (integer, required): Caller-assigned MIDAS item 5 (integer 0-90): days of missed family, social, or leisure activities in the last 3 months. magent does not assign the count. ## 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/midas` 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": [ { "missed_household_days": "0", "missed_social_days": "0", "missed_work_days": "0", "reduced_household_days": "0", "reduced_work_days": "0" }, { "missed_household_days": "0", "missed_social_days": "0", "missed_work_days": "0", "reduced_household_days": "0", "reduced_work_days": "0" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/midas Example 200: ```json { "count": 2, "path": "/api/calc/midas", "items": [ { "components": [ { "value": 0, "factor": "missed_work_days", "points": 0, "present": true }, { "value": 0, "factor": "reduced_work_days", "points": 0, "present": true }, { "value": 0, "factor": "missed_household_days", "points": 0, "present": true }, { "value": 0, "factor": "reduced_household_days", "points": 0, "present": true }, { "value": 0, "factor": "missed_social_days", "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": "Stewart WF, Lipton RB, Whyte J, Dowson A, Kolodner A, Liberman JN, Sawyer J", "doi": "10.1212/wnl.53.5.988", "id": "stewart-1999", "pmid": "10496257", "source": "Neurology. 1999;53(5):988-994", "title": "An international study to assess reliability of the Migraine Disability Assessment (MIDAS) score" }, "formula": "midas", "formula_expression": "MIDAS = missed_work_days + reduced_work_days + missed_household_days + reduced_household_days + missed_social_days; each caller-assigned integer 0-90 (last 3 months); max 450; magent does not include questions A or B; grades I 0-5 little/minimal, II 6-10 mild, III 11-20 moderate, IV ≥21 severe", "max_score": 450, "score": 0, "midas_grade": "I" }, { "components": [ { "value": 0, "factor": "missed_work_days", "points": 0, "present": true }, { "value": 0, "factor": "reduced_work_days", "points": 0, "present": true }, { "value": 0, "factor": "missed_household_days", "points": 0, "present": true }, { "value": 0, "factor": "reduced_household_days", "points": 0, "present": true }, { "value": 0, "factor": "missed_social_days", "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": "Stewart WF, Lipton RB, Whyte J, Dowson A, Kolodner A, Liberman JN, Sawyer J", "doi": "10.1212/wnl.53.5.988", "id": "stewart-1999", "pmid": "10496257", "source": "Neurology. 1999;53(5):988-994", "title": "An international study to assess reliability of the Migraine Disability Assessment (MIDAS) score" }, "formula": "midas", "formula_expression": "MIDAS = missed_work_days + reduced_work_days + missed_household_days + reduced_household_days + missed_social_days; each caller-assigned integer 0-90 (last 3 months); max 450; magent does not include questions A or B; grades I 0-5 little/minimal, II 6-10 mild, III 11-20 moderate, IV ≥21 severe", "max_score": 450, "score": 0, "midas_grade": "I" } ] } ``` ## Response fields - `formula` (string): midas - `formula_expression` (string): Exact expression used - `score` (integer): MIDAS points 0-450 - `max_score` (integer): 450 - `midas_grade` (string): Published grades used with this instrument: I (0-5 little/minimal), II (6-10 mild), III (11-20 moderate), IV (≥21 severe). Not a migraine diagnosis. - `components` (array): Per-item caller-assigned day counts - `citation` (object): Stewart et al. Neurology 1999 citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "components": [ { "value": 0, "factor": "missed_work_days", "points": 0, "present": true }, { "value": 0, "factor": "reduced_work_days", "points": 0, "present": true }, { "value": 0, "factor": "missed_household_days", "points": 0, "present": true }, { "value": 0, "factor": "reduced_household_days", "points": 0, "present": true }, { "value": 0, "factor": "missed_social_days", "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": "Stewart WF, Lipton RB, Whyte J, Dowson A, Kolodner A, Liberman JN, Sawyer J", "doi": "10.1212/wnl.53.5.988", "id": "stewart-1999", "pmid": "10496257", "source": "Neurology. 1999;53(5):988-994", "title": "An international study to assess reliability of the Migraine Disability Assessment (MIDAS) score" }, "formula": "midas", "formula_expression": "MIDAS = missed_work_days + reduced_work_days + missed_household_days + reduced_household_days + missed_social_days; each caller-assigned integer 0-90 (last 3 months); max 450; magent does not include questions A or B; grades I 0-5 little/minimal, II 6-10 mild, III 11-20 moderate, IV ≥21 severe", "max_score": 450, "score": 0, "midas_grade": "I" } ``` ## Errors - HTTP 400 `invalid_midas`: MIDAS needs five 3-month day counts (work missed, work ≥50% reduced, household missed, household ≥50% reduced, social missed). Returned before settlement; you are not charged. - HTTP 400 `invalid_midas_days`: each MIDAS day count must be an integer from 0 to 90 (last 3 months). 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 - [GAD-7](https://magentlab.com/docs/gad-7) — Sum seven caller-assigned Spitzer 2006 GAD-7 integers (0-3) and return the published 0-21 total, 5/10/15 severity cuts, and ≥10 case-finding flag. - [PHQ-9](https://magentlab.com/docs/phq-9) — Sum nine caller-assigned Kroenke 2001 PHQ-9 integers (0-3) and return the published total (max 27), severity cutpoints, and ≥10 screen. ## 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.