---
title: "List overridden variants"
method: GET
path: "/sessions/{session_id}/overrides"
tags: ["overrides"]
---

# List overridden variants

`GET /sessions/{session_id}/overrides`

## 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}/overrides`
- Auth: HTTP bearer

List all overridden variants for a session.

## Path parameters

- `session_id` string, uuid, required

## Query parameters

- `variant_idx` integer, nullable: Filter by variant index

## Response `200`

Successful Response

- OverridesListResponse: List of overridden variants.
  - `overrides` OverrideEntry[], required
    - `variant_idx` integer, required
    - `acmg_class` string, required: Current override classification
    - `acmg_class_original` string, required: Pipeline class at override time
    - `override_reason` string, required: Clinical justification
    - `overridden_by` UserAttribution, required: Identifies a user who performed an action, with optional timestamp. Used in flag/override responses and annotation records. Both user_id and user_name are required — user_id for system references, user_name for display. timestamp optional because some historical records (migrated from DuckDB) lack precise timestamps.
      - `user_id` string, uuid, nullable: User UUID. May be None for historical records migrated from DuckDB where original user was not tracked.
      - `user_name` string, required: Display name of the user. For historical records, may be 'system:historical-migration' or 'unknown-historical'.
      - `timestamp` string, date-time, nullable: When the action occurred. None for historical records without precise timestamp.
  - `total_count` integer, required

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/helena/apis/helix-insight-variant-analysis-service.md) · [All operations](https://skmtc.dev/helena/apis/helix-insight-variant-analysis-service/llms.txt) · [OpenAPI document](https://skmtc.dev/helena/apis/helix-insight-variant-analysis-service/revisions/fe51fd20cdf1?raw)