---
title: "Challenge Cycles (pythagorean)"
method: POST
path: "/numerology/pythagorean/challenge"
tags: ["Numerology: Pythagorean"]
---

# Challenge Cycles (pythagorean)

`POST /numerology/pythagorean/challenge`

Calculate four Challenge cycles: life-area difficulties to master, derived from birth date components. Numerology: Pythagorean system.

## Request body

- NumerologyNameDate
  - `name` string, required
  - `date` string, required

## Response `200`

Successful calculation

- object
  - `ok` boolean
  - `data` object
    - `system` string, nullable
    - `challenges` object, nullable
      - `first` object, nullable
        - `reduced` number, nullable
        - `meaning` object, nullable
          - `archetype` string, nullable
      - `second` object, nullable
        - `reduced` number, nullable
      - `third` object, nullable
        - `reduced` number, nullable
      - `fourth` object, nullable
        - `reduced` number, nullable

## Other responses

- `400` — Validation error
- `401` — Missing or invalid API key

## Changes

- **2026-08-22** `5a17388652f3` — 2 breaking
  - added the new required request property `date`
  - added the new required request property `name`
- **2026-08-14** `994755209cea` — 2 info
  - api tag `Numerology: Pythagorean` added
  - api tag `Numerology — Pythagorean` removed

[Change history](https://skmtc.dev/astroway/apis/astroway-calculation-api/changes/numerology/pythagorean/challenge/post.md)

---

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