---
title: "Get variant details"
method: GET
path: "/sessions/{session_id}/variants/{variant_idx}"
tags: ["variants"]
---

# Get variant details

`GET /sessions/{session_id}/variants/{variant_idx}`

## Request

- Base URL: `https://api.helena.bio` (the document declares no server; this is the origin it was published from)
- URL: `https://api.helena.bio/sessions/{session_id}/variants/{variant_idx}`
- Auth: none declared
- TypeScript: <https://skmtc.dev/helena-bioinformatics/apis/helix-insight-variant-analysis-service/docs/sessions/:session_id/variants/:variant_idx/get.ts> (a function with typed inputs; its response is checked against the schema)

Get detailed information for a specific variant

## Path parameters

- `session_id` string, uuid, required
- `variant_idx` integer, required

## Query parameters

- `include_review_context` boolean

## Headers

- `X-Review-HPO-Ids` string, nullable

## Response `200`

Successful Response

- VariantDetailResponse: Detailed single variant response.
  - `variant` object, required: Complete variant data

## Other responses

- `422`: Validation Error

## Changes

- **2026-10-26** `aacb9cde542a`: 2 info
  - added the new optional `header` request parameter `X-Review-HPO-Ids`
  - added the new optional `query` request parameter `include_review_context`

[Operation history](https://skmtc.dev/helena-bioinformatics/apis/helix-insight-variant-analysis-service/changes/sessions/:session_id/variants/:variant_idx/get.md)

---

[API](https://skmtc.dev/helena-bioinformatics/apis/helix-insight-variant-analysis-service.md) - [All operations](https://skmtc.dev/helena-bioinformatics/apis/helix-insight-variant-analysis-service/llms.txt) - [OpenAPI document](https://skmtc.dev/helena-bioinformatics/apis/helix-insight-variant-analysis-service/revisions/a800b0b27feb?raw)