---
title: "Get a learner mission-level performance for a track (nested child rows)"
method: GET
path: "/api/v1/detailed-user-activity/performance-by-track-missions"
tags: ["dashboard", "bff"]
---

# Get a learner mission-level performance for a track (nested child rows)

`GET /api/v1/detailed-user-activity/performance-by-track-missions`

## Query parameters

- `page` number
- `limit` number
- `language` 'en' | 'de' | 'fr' | 'es' | 'it' | 'nl' | 'zh-Hans'
- `createdAfter` string, date-time
- `createdBefore` string, date-time
- `userId` string, uuid, required
- `trackId` string, required

## Response `201`

- DetailedUserActivityGetPerformanceByTrackMissionsResponseDTO
  - `data` object[], required
    - `attempted` number, required — Whether the learner attempted this mission: 1 if they have >= 1 analysis-completed session, else 0 (single-learner population).
    - `averageScore` number, nullable, required — The learner's latest DONE scored session score for this mission (any scored session, including sub-70 / not completed). Null when the learner has no scored session (never 0).
    - `completedCount` number, required — Whether the learner completed this mission: 1 if completed, else 0 (single-learner population).
    - `improvementDelta` number, nullable, required — The learner's (best − first session) score for this mission. Null unless the learner has >= 2 scored sessions on it.
    - `missionId` string, required — Unique identifier for the mission
    - `missionName` string, required — Name of the mission
    - `personaImage` string, required — URL of the persona image
    - `personaName` string, required — Name of the persona used in the mission
    - `populationCount` number, required — Always 1 for the individual view (the single learner).
    - `trackName` string, required — Name of the parent track
  - `meta` object, required
    - `hasNext` boolean, required
    - `limit` number, required
    - `page` number, required
    - `total` number, required

---

[API](https://skmtc.net/wejam/apis/jam.md) · [All operations](https://skmtc.net/wejam/apis/jam/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/wejam/jam/revisions/bd5a5f406bca/schema)