Biorhythm Best Days

POST

/wellness/biorhythm/best-days

request.sh

curl -X POST https://api.astroway.info/v1/wellness/biorhythm/best-days \
  -H "X-Api-Key: aw_live_..." \
  -H "Content-Type: application/json" \
  -d '{ "birthDate": "1990-06-15", "rangeStart": "2026-12-01", "rangeEnd": "2026-12-31", "count": 3 }'

▸ Try it POST /wellness/biorhythm/best-days

• Production

The highest-scoring days in a range (up to 366 days): score = 100 x (sum of the three cycle values + 3) / 6, critical days left out by default. A historical model, not a prediction and not health advice; the disclaimer travels with the answer.

Authorizations

• ApiKeyAuth

Parameters

Query Parameters

fields

string

Comma-separated dotted paths, relative to data, to keep in the response. A path is applied to every element of an array, so planets.name means the name of each planet. Paths that match nothing come back in _fields_unmatched; a list where nothing matches at all is a 400, because an empty object would be a confident wrong answer.

Example

planets.name,planets.longitude

precision

integer

<= 15

Round every non-integer number in the response to this many decimal places. Integers are left alone, because an id is not a measurement. Ecliptic longitudes ship with fourteen decimals by default; 2 is about a tenth of an arcminute.

Example

4

Header Parameters

Idempotency-Key

string

>= 1 characters <= 255 characters /^[\x21-\x7E]+$/

Unique per logical operation, kept across retries. For 24 hours from the first request, a repeat with the same key, method, path, body and query string returns the stored response with Idempotent-Replayed: true and costs 0 credits. The same key with a different body or query string is a 409 IDEMPOTENCY_KEY_REUSED; a repeat while the first is still running is a 409 IDEMPOTENCY_IN_PROGRESS. Only 2xx responses are kept. See /idempotency/.

Example

01HXY2A7ZM0ABCDEF

Request Body ^required

Media type application/json

object

birthDate required

string

/^\d{4}-\d{2}-\d{2}$/

rangeStart

string

/^\d{4}-\d{2}-\d{2}$/

rangeEnd

string

/^\d{4}-\d{2}-\d{2}$/

count

How many days to return, best first.

integer

default: 5 >= 1 <= 31

excludeCritical

Leave out days on which any cycle crosses zero.

boolean

default: true

Example

{
  "birthDate": "1990-06-15",
  "rangeStart": "2026-12-01",
  "rangeEnd": "2026-12-31",
  "count": 3
}

Responses

200

Successful calculation

Media type application/json

object

ok

boolean

data

object

birthDate

string

nullable

range

object

start

string

nullable

end

string

nullable

days

number

nullable

bestDays

Array<object>

nullable

object

date

string

nullable

dayOfLife

number

nullable

physical

number

nullable

emotional

number

nullable

intellectual

number

nullable

critical

Array

nullable

score

number

nullable

formula

string

nullable

disclaimer

string

nullable

Example

{
  "ok": true,
  "data": {
    "birthDate": "1990-06-15",
    "range": {
      "start": "2026-12-01",
      "end": "2026-12-31",
      "days": 31
    },
    "bestDays": [
      {
        "date": "2026-12-24",
        "dayOfLife": 13341,
        "physical": 0.2698,
        "emotional": 0.2225,
        "intellectual": 0.9898,
        "critical": [],
        "score": 75
      }
    ],
    "formula": "score = 100 x (physical + emotional + intellectual + 3) / 6, each value sin(2 pi x day / period); ties go to the earlier date.",
    "disclaimer": "Biorhythm cycles are a 19th-century numerological construct (Fliess 1897, Swoboda 1904) with no evidential support. Returned for entertainment and for parity with charting tools, not as a prediction."
  }
}

400

Validation error

Media type application/json

Example

{
  "ok": false,
  "error": {
    "code": "INVALID_INPUT",
    "message": "Validation failed: date: Date must be YYYY-MM-DD",
    "details": [
      {
        "path": "date",
        "message": "Date must be YYYY-MM-DD"
      }
    ]
  }
}

401

Missing or invalid API key

Media type application/json

Example

{
  "ok": false,
  "error": {
    "code": "INVALID_API_KEY",
    "message": "Invalid API key"
  }
}