Neurology · LIVE

Migraine Disability Assessment (MIDAS)

MIDAS

Sum five caller-assigned MIDAS day counts over the last 3 months and return the 0-450 total and published grades I–IV.

LIVE $0.005 USDC GET /api/calc/midas

Markdown: /docs/midas.md · Canonical: https://magentlab.com/docs/midas

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

Title: An international study to assess reliability of the Migraine Disability Assessment (MIDAS) score
Authors: Stewart WF, Lipton RB, Whyte J, Dowson A, Kolodner A, Liberman JN, Sawyer J
Source: Neurology. 1999;53(5):988-994
DOI: 10.1212/wnl.53.5.988

Worked example

All day counts 0

Given: missed_household_days=0missed_social_days=0missed_work_days=0reduced_household_days=0reduced_work_days=0

missed_work_days 0 + reduced_work_days 0 + missed_household_days 0 + reduced_household_days 0 + missed_social_days 0
Score = 0 (max 450); midas_grade I (little/minimal)

Worked example score 12

Given: missed_household_days=3missed_social_days=3missed_work_days=2reduced_household_days=2reduced_work_days=2

missed_work_days 2 + reduced_work_days 2 + missed_household_days 3 + reduced_household_days 2 + missed_social_days 3
Score = 12 (max 450); midas_grade III (moderate)

Grade IV cut at 21

Given: missed_household_days=0missed_social_days=0missed_work_days=21reduced_household_days=0reduced_work_days=0

missed_work_days 21 + reduced_work_days 0 + missed_household_days 0 + reduced_household_days 0 + missed_social_days 0
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

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/midas?missed_work_days=0&reduced_work_days=0&missed_household_days=0&reduced_household_days=0&missed_social_days=0

Full URL: https://api.magentlab.com/api/calc/midas?missed_work_days=0&reduced_work_days=0&missed_household_days=0&reduced_household_days=0&missed_social_days=0

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge.

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/midas?missed_work_days=0&reduced_work_days=0&missed_household_days=0&reduced_household_days=0&missed_social_days=0"

Parameters

Name	Type	Required	Description
`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.

POST /api/calc/midas Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 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 (fixture)

{
  "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"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "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

Field	Type	Description
`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

Machine form of the same example. Frozen fixture. Not a live lookup.

{
  "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"
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

HTTP	Code	When
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.
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.
400	`invalid_items`	POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
400	`invalid_item_count`	items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
400	`invalid_item`	each items entry must be a JSON object Returned before settlement; you are not charged.

Related tools

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 — 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. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /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.