---
title: "HD Transits"
method: POST
path: "/human-design/transits"
tags: ["Human Design"]
---

# HD Transits

`POST /human-design/transits`

Calculate current Human Design transit activations. Optionally overlay on natal chart to show combined defined centers and channels.

## Request body

- HdTransits — Transit moment plus an optional natal date, time and offset to overlay the activations on.
  - `date` string, required
  - `time` string, required
  - `timezoneOffset` number, nullable — Hours from UTC at the given moment, not minutes. Fractional zones are hours too: 5.5 for India, 5.75 for Nepal, -3.5 for Newfoundland. Defaults to 0, meaning UTC.
  - `latitude` number, required
  - `longitude` number, required
  - `houseSystem` string
  - `name` string
  - `city` string
  - `zodiacType` 'tropical' | 'sidereal'
  - `ayanamsaId` number, nullable
  - `ayanamsa` 'fagan-bradley' | 'lahiri' | 'de-luce' | 'raman' | 'krishnamurti' | 'kp' | 'yukteshwar' | 'jn-bhasin' | 'true-citra' | 'djwhal-khul' — Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.
  - `cosmogram` boolean
  - `natalDate` string
  - `natalTime` string
  - `natalTimezoneOffset` number, nullable

## Response `200`

Successful calculation

- object
  - `ok` boolean
  - `data` object
    - `transitActivations` object[], nullable
      - `planet` string, nullable
      - `planetId` number, nullable
      - `gate` number, nullable
      - `line` number, nullable
      - `color` number, nullable
      - `tone` number, nullable
      - `base` number, nullable
      - `longitude` number, nullable
      - `isPersonality` boolean, nullable
    - `combinedCenters` object[], nullable
      - `name` string, nullable
      - `defined` boolean, nullable
      - `open` boolean, nullable
      - `gates` number[], nullable
      - `activeGates` number[], nullable
    - `combinedChannels` object[], nullable
      - `gate1` number, nullable
      - `gate2` number, nullable
      - `centerA` string, nullable
      - `centerB` string, nullable
      - `activatedBy` string[], nullable

## Other responses

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

## Changes

- **2026-08-24** `8ab5a768b521` — 2 breaking, 2 warning, 11 info
  - the response property `data/transitActivations/items/` became nullable for the status `200`
  - the `data/transitActivations/items/` response's property type/format changed from ``/`` to `object`/`` for status `200`
  - removed the optional property `data/combined` from the response with the `200` status
  - removed the optional property `data/natalActivations` from the response with the `200` status
  - …11 more
- **2026-08-18** `dd3764875e7a` — 1 info
  - added the new optional request property `allOf[#/components/schemas/ChartInput]/ayanamsa`
- **2026-08-15** `e637d1a9911b` — 2 warning
  - the `allOf[#/components/schemas/ChartInput]/timezoneOffset` request property's max was set to `14.00`
  - the `allOf[#/components/schemas/ChartInput]/timezoneOffset` request property's min was set to `-14.00`
- **2026-08-11** `b0533bcc12c0` — 4 breaking, 4 warning, 2 info
  - the request property `allOf[#/components/schemas/ChartInput]/latitude` became not nullable
  - the request property `allOf[#/components/schemas/ChartInput]/longitude` became not nullable
  - the request property `allOf[#/components/schemas/ChartInput]/latitude` became required
  - the request property `allOf[#/components/schemas/ChartInput]/longitude` became required
  - …6 more

[Change history](https://skmtc.dev/astroway/apis/astroway-calculation-api/changes/human-design/transits/post.md)

---

[API](https://skmtc.dev/astroway/apis/astroway-calculation-api.md) · [All operations](https://skmtc.dev/astroway/apis/astroway-calculation-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/astroway/astroway-calculation-api/revisions/8ab5a768b521/schema)