Emergency · LIVE

Geriatric Depression Scale 15-item (GDS-15)

GDS-15

Sum fifteen Sheikh 1986 GDS-15 yes/no items using that paper's reverse-scoring key and return the published 0-15 total. Does not apply later total-score severity bands.

LIVE $0.005 USDC GET /api/calc/gds_15

Markdown: /docs/gds-15.md · Canonical: https://magentlab.com/docs/gds-15

Not a medical device. Not a diagnosis, dose, or listing recommendation.

What it computes

Sum fifteen Sheikh 1986 GDS-15 yes/no items using that paper's reverse-scoring key and return the published 0-15 total. Does not apply later total-score severity bands.

When to use

When an agent already has Sheikh 1986 GDS-15 yes/no answers (as asked, not pre-scored points) and needs the published total. magent does not interview the patient, diagnose depression, score PHQ-9, score the 30-item GDS, or apply later 0-4/5-9/10+ cutoffs.

When not to use

• Not a medical device and not a depression diagnosis or treatment order.
• Each of the fifteen items is a caller-assigned yes/no answering the question as asked. magent does not interview the patient.
• This is Sheikh 1986 GDS-15 only (15-item short form; max 15). magent does not score the 30-item GDS or PHQ-9.
• Sheikh 1986 published no total-score severity bands. This tool returns score and max_score only. It does not apply later Almeida or website 0-4/5-9/10+ cutoffs.

Formula

GDS-15 = (1 if not satisfied_with_life) + dropped_activities + life_empty + often_bored + (1 if not good_spirits) + afraid_something_bad + (1 if not happy_most_of_time) + often_helpless + prefer_stay_home + more_memory_problems + (1 if not wonderful_to_be_alive) + pretty_worthless + (1 if not full_of_energy) + situation_hopeless + most_people_better_off; Sheikh 1986 15-item short form; each yes/no as asked; reverse-scored items 1, 5, 7, 11, 13; max 15; no total-score severity bands

Citation

Title

Geriatric Depression Scale (GDS): recent evidence and development of a shorter version

Authors

Sheikh JI, Yesavage JA

Source

Clin Gerontol. 1986;5(1-2):165-173

DOI

10.1300/J018v05n01_09

Worked example

Also searched as

• GDS-15
• Geriatric Depression Scale 15-item
• Sheikh Yesavage GDS short form
• GDS short form
• 15-item GDS
• Sheikh 1986 GDS
• geriatric depression screen

Try

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

/api/calc/gds_15?satisfied_with_life=true&dropped_activities=false&life_empty=false&often_bored=false&good_spirits=true&afraid_something_bad=false&happy_most_of_time=true&often_helpless=false&prefer_stay_home=false&more_memory_problems=false&wonderful_to_be_alive=true&pretty_worthless=false&full_of_energy=true&situation_hopeless=false&most_people_better_off=false

Full URL: https://api.magentlab.com/api/calc/gds_15?satisfied_with_life=true&dropped_activities=false&life_empty=false&often_bored=false&good_spirits=true&afraid_something_bad=false&happy_most_of_time=true&often_helpless=false&prefer_stay_home=false&more_memory_problems=false&wonderful_to_be_alive=true&pretty_worthless=false&full_of_energy=true&situation_hopeless=false&most_people_better_off=false

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/gds_15?satisfied_with_life=true&dropped_activities=false&life_empty=false&often_bored=false&good_spirits=true&afraid_something_bad=false&happy_most_of_time=true&often_helpless=false&prefer_stay_home=false&more_memory_problems=false&wonderful_to_be_alive=true&pretty_worthless=false&full_of_energy=true&situation_hopeless=false&most_people_better_off=false"

Parameters

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/gds_15 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": [
    {
      "afraid_something_bad": "false",
      "dropped_activities": "false",
      "full_of_energy": "true",
      "good_spirits": "true",
      "happy_most_of_time": "true",
      "life_empty": "false",
      "more_memory_problems": "false",
      "most_people_better_off": "false",
      "often_bored": "false",
      "often_helpless": "false",
      "prefer_stay_home": "false",
      "pretty_worthless": "false",
      "satisfied_with_life": "true",
      "situation_hopeless": "false",
      "wonderful_to_be_alive": "true"
    },
    {
      "afraid_something_bad": "false",
      "dropped_activities": "false",
      "full_of_energy": "true",
      "good_spirits": "true",
      "happy_most_of_time": "true",
      "life_empty": "false",
      "more_memory_problems": "false",
      "most_people_better_off": "false",
      "often_bored": "false",
      "often_helpless": "false",
      "prefer_stay_home": "false",
      "pretty_worthless": "false",
      "satisfied_with_life": "true",
      "situation_hopeless": "false",
      "wonderful_to_be_alive": "true"
    }
  ]
}

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/gds_15",
  "items": [
    {
      "components": [
        {
          "factor": "satisfied_with_life",
          "points": 0,
          "present": false
        },
        {
          "factor": "dropped_activities",
          "points": 0,
          "present": false
        },
        {
          "factor": "life_empty",
          "points": 0,
          "present": false
        },
        {
          "factor": "often_bored",
          "points": 0,
          "present": false
        },
        {
          "factor": "good_spirits",
          "points": 0,
          "present": false
        },
        {
          "factor": "afraid_something_bad",
          "points": 0,
          "present": false
        },
        {
          "factor": "happy_most_of_time",
          "points": 0,
          "present": false
        },
        {
          "factor": "often_helpless",
          "points": 0,
          "present": false
        },
        {
          "factor": "prefer_stay_home",
          "points": 0,
          "present": false
        },
        {
          "factor": "more_memory_problems",
          "points": 0,
          "present": false
        },
        {
          "factor": "wonderful_to_be_alive",
          "points": 0,
          "present": false
        },
        {
          "factor": "pretty_worthless",
          "points": 0,
          "present": false
        },
        {
          "factor": "full_of_energy",
          "points": 0,
          "present": false
        },
        {
          "factor": "situation_hopeless",
          "points": 0,
          "present": false
        },
        {
          "factor": "most_people_better_off",
          "points": 0,
          "present": false
        }
      ],
      "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": "Sheikh JI, Yesavage JA",
        "doi": "10.1300/J018v05n01_09",
        "id": "sheikh-1986",
        "source": "Clin Gerontol. 1986;5(1-2):165-173",
        "title": "Geriatric Depression Scale (GDS): recent evidence and development of a shorter version"
      },
      "formula": "gds_15",
      "formula_expression": "GDS-15 = (1 if not satisfied_with_life) + dropped_activities + life_empty + often_bored + (1 if not good_spirits) + afraid_something_bad + (1 if not happy_most_of_time) + often_helpless + prefer_stay_home + more_memory_problems + (1 if not wonderful_to_be_alive) + pretty_worthless + (1 if not full_of_energy) + situation_hopeless + most_people_better_off; Sheikh 1986 15-item short form; each yes/no as asked; reverse-scored items 1, 5, 7, 11, 13; max 15; no total-score severity bands",
      "max_score": 15,
      "score": 0
    },
    {
      "components": [
        {
          "factor": "satisfied_with_life",
          "points": 0,
          "present": false
        },
        {
          "factor": "dropped_activities",
          "points": 0,
          "present": false
        },
        {
          "factor": "life_empty",
          "points": 0,
          "present": false
        },
        {
          "factor": "often_bored",
          "points": 0,
          "present": false
        },
        {
          "factor": "good_spirits",
          "points": 0,
          "present": false
        },
        {
          "factor": "afraid_something_bad",
          "points": 0,
          "present": false
        },
        {
          "factor": "happy_most_of_time",
          "points": 0,
          "present": false
        },
        {
          "factor": "often_helpless",
          "points": 0,
          "present": false
        },
        {
          "factor": "prefer_stay_home",
          "points": 0,
          "present": false
        },
        {
          "factor": "more_memory_problems",
          "points": 0,
          "present": false
        },
        {
          "factor": "wonderful_to_be_alive",
          "points": 0,
          "present": false
        },
        {
          "factor": "pretty_worthless",
          "points": 0,
          "present": false
        },
        {
          "factor": "full_of_energy",
          "points": 0,
          "present": false
        },
        {
          "factor": "situation_hopeless",
          "points": 0,
          "present": false
        },
        {
          "factor": "most_people_better_off",
          "points": 0,
          "present": false
        }
      ],
      "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": "Sheikh JI, Yesavage JA",
        "doi": "10.1300/J018v05n01_09",
        "id": "sheikh-1986",
        "source": "Clin Gerontol. 1986;5(1-2):165-173",
        "title": "Geriatric Depression Scale (GDS): recent evidence and development of a shorter version"
      },
      "formula": "gds_15",
      "formula_expression": "GDS-15 = (1 if not satisfied_with_life) + dropped_activities + life_empty + often_bored + (1 if not good_spirits) + afraid_something_bad + (1 if not happy_most_of_time) + often_helpless + prefer_stay_home + more_memory_problems + (1 if not wonderful_to_be_alive) + pretty_worthless + (1 if not full_of_energy) + situation_hopeless + most_people_better_off; Sheikh 1986 15-item short form; each yes/no as asked; reverse-scored items 1, 5, 7, 11, 13; max 15; no total-score severity bands",
      "max_score": 15,
      "score": 0
    }
  ]
}

Response

Example JSON

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

{
  "components": [
    {
      "factor": "satisfied_with_life",
      "points": 0,
      "present": false
    },
    {
      "factor": "dropped_activities",
      "points": 0,
      "present": false
    },
    {
      "factor": "life_empty",
      "points": 0,
      "present": false
    },
    {
      "factor": "often_bored",
      "points": 0,
      "present": false
    },
    {
      "factor": "good_spirits",
      "points": 0,
      "present": false
    },
    {
      "factor": "afraid_something_bad",
      "points": 0,
      "present": false
    },
    {
      "factor": "happy_most_of_time",
      "points": 0,
      "present": false
    },
    {
      "factor": "often_helpless",
      "points": 0,
      "present": false
    },
    {
      "factor": "prefer_stay_home",
      "points": 0,
      "present": false
    },
    {
      "factor": "more_memory_problems",
      "points": 0,
      "present": false
    },
    {
      "factor": "wonderful_to_be_alive",
      "points": 0,
      "present": false
    },
    {
      "factor": "pretty_worthless",
      "points": 0,
      "present": false
    },
    {
      "factor": "full_of_energy",
      "points": 0,
      "present": false
    },
    {
      "factor": "situation_hopeless",
      "points": 0,
      "present": false
    },
    {
      "factor": "most_people_better_off",
      "points": 0,
      "present": false
    }
  ],
  "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": "Sheikh JI, Yesavage JA",
    "doi": "10.1300/J018v05n01_09",
    "id": "sheikh-1986",
    "source": "Clin Gerontol. 1986;5(1-2):165-173",
    "title": "Geriatric Depression Scale (GDS): recent evidence and development of a shorter version"
  },
  "formula": "gds_15",
  "formula_expression": "GDS-15 = (1 if not satisfied_with_life) + dropped_activities + life_empty + often_bored + (1 if not good_spirits) + afraid_something_bad + (1 if not happy_most_of_time) + often_helpless + prefer_stay_home + more_memory_problems + (1 if not wonderful_to_be_alive) + pretty_worthless + (1 if not full_of_energy) + situation_hopeless + most_people_better_off; Sheikh 1986 15-item short form; each yes/no as asked; reverse-scored items 1, 5, 7, 11, 13; max 15; no total-score severity bands",
  "max_score": 15,
  "score": 0
}

Client errors (HTTP 400)

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

Related tools

• 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.
• MADRS — Sum ten caller-assigned Montgomery 1979 MADRS items (each integer 0-6) and return the published 0-60 total. Does not apply later total-score severity bands.
• HAM-D — Sum seventeen caller-assigned Hamilton 1960 items (eight integers 0-4 and nine integers 0-2) and return the published 0-50 total. Does not apply later total-score severity bands or the four excluded 21-item variables.

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.