---
title: "List all estimation procedures"
method: GET
path: "/estimationprocedure/list"
tags: ["estimationprocedure"]
---

# List all estimation procedures

`GET /estimationprocedure/list`

Returns an array with all model performance estimation procedures in the system.

## Query parameters

- `api_key` string

## Response `200`

A list of estimation procedures

- EstimationProcedureList
  - `estimationprocedures` EstimationProcedureListEstimationprocedures
    - `estimationprocedure` EstimationProcedureListEstimationproceduresEstimationprocedure[]
      - `id` string — The estimation procedure ID
      - `ttid` string — The task type ID
      - `name` string — The estimation procedure name, e.g. '10 fold Crossvalidation'
      - `type` string — The estimation procedure type, e.g. 'crossvalidation'
      - `repeats` string — The number of repeats, e.g. '10'
      - `folds` string — The number of cross-validation folds, e.g. '10'
      - `stratified_sampling` string — Whether or not the sampling is stratified, 'true' or 'false'

## Other responses

- `412` — Precondition failed. An error code and message are returned. 500 - No model performance estimation procedures available.

## Changes

- **2019-02-22** `8e2f718635ef` — 2 info
  - added the non-success response with the status `412`
  - removed the non-success response with the status `500`
- **2018-09-18** `4df86fe63217` — 1 info
  - the `query` request parameter `api_key` became optional
- **2018-01-17** `2209d99ea36e` — 1 breaking, 2 info
  - the `query` request parameter `api_key` became required
  - added the non-success response with the status `500`
  - removed the non-success response with the status `412`

[Change history](https://skmtc.dev/openml/apis/openml-api/changes/estimationprocedure/list/get.md)

---

[API](https://skmtc.dev/openml/apis/openml-api.md) · [All operations](https://skmtc.dev/openml/apis/openml-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/openml/openml-api/revisions/263d3d6ee586/schema)