---
title: "GET /projects/{projectId}/iterations/{iterationId}/performance"
method: GET
path: "/projects/{projectId}/iterations/{iterationId}/performance"
---

# GET /projects/{projectId}/iterations/{iterationId}/performance

`GET /projects/{projectId}/iterations/{iterationId}/performance`

Get detailed performance information about an iteration.

## Path parameters

- `projectId` string, uuid, required
- `iterationId` string, uuid, required

## Query parameters

- `threshold` number, float
- `overlapThreshold` number, float

## Response `200`

OK

- IterationPerformance — Represents the detailed performance data for a trained iteration.
  - `perTagPerformance` TagPerformance[] — Gets the per-tag performance details for this iteration.
    - `id` string, uuid
    - `name` string
    - `precision` number, float — Gets the precision.
    - `precisionStdDeviation` number, float — Gets the standard deviation for the precision.
    - `recall` number, float — Gets the recall.
    - `recallStdDeviation` number, float — Gets the standard deviation for the recall.
    - `averagePrecision` number, float, nullable — Gets the average precision when applicable.
  - `precision` number, float — Gets the precision.
  - `precisionStdDeviation` number, float — Gets the standard deviation for the precision.
  - `recall` number, float — Gets the recall.
  - `recallStdDeviation` number, float — Gets the standard deviation for the recall.
  - `averagePrecision` number, float, nullable — Gets the average precision when applicable.

## Other responses

- `default` — Error response

## Changes

- **2026-07-13** `e873dad2a189` — 1 warning, 2 info
  - deleted the `header` request parameter `Training-Key`
  - api operation id `GetIterationPerformance` removed and replaced with `Iterations_GetPerformance`
  - api tag `ProjectApi` removed
- **2026-07-13** `82dfb72c78fa` — 2 info
  - api operation id `Iterations_GetPerformance` removed and replaced with `GetIterationPerformance`
  - api tag `ProjectApi` added
- **2026-07-13** `50242c512f6f` — 2 info
  - added the new optional `query` request parameter `overlapThreshold`
  - the `query` request parameter `threshold` became optional
- **2018-02-03** `8feb7cde15fc` — 2 breaking, 1 warning
  - added the new required `header` request parameter `Training-Key`
  - the `query` request parameter `threshold` became required
  - deleted the `query` request parameter `overlapThreshold`

[Change history](https://skmtc.dev/azure/apis/cognitiveservices-customvision-training/changes/projects/:projectId/iterations/:iterationId/performance/get.md)

---

[API](https://skmtc.dev/azure/apis/cognitiveservices-customvision-training.md) · [All operations](https://skmtc.dev/azure/apis/cognitiveservices-customvision-training/llms.txt) · [OpenAPI document](https://skmtc.dev/azure/apis/cognitiveservices-customvision-training/revisions/e873dad2a189?raw)