Get Evaluation Set

Retrieve a specific evaluation set by ID. This returns an evaluation set object, but does not include the items in the evaluation set. You can use the List Evaluation Set Items endpoint to get the items in an evaluation set.

Retrieve a specific evaluation set by ID. This returns an evaluation set object, but does not include the items in the evaluation set. You can use the [List Evaluation Set Items](https://docs.extend.ai/2026-02-09/developers/api-reference/endpoints/evaluation/list-evaluation-set-items) endpoint to get the items in an evaluation set.

Authentication

AuthorizationBearer

Bearer authentication of the form Bearer <token>, where token is your auth token.

Path parameters

idstringRequired

The ID of the evaluation set.

Example: "ev_2LcgeY_mp2T5yPaEuq5Lw"

Headers

x-extend-api-version"2026-02-09"Optional

API version to use for the request. If you’re using an SDK, you can ignore this parameter. If you are not using an SDK and do not specify a version, you will either receive a 400 Bad Request or be set to a previous legacy version. See API Versioning for more details.

API version to use for the request. If you're using an SDK, you can ignore this parameter. If you are not using an SDK and do not specify a version, you will either receive a `400 Bad Request` or be set to a previous legacy version. See [API Versioning](https://docs.extend.ai/2026-02-09/developers/api-versioning) for more details.

x-extend-workspace-idstringOptional

The workspace ID to target. Required when using an organization-scoped API key; optional for workspace-scoped keys (the key is already tied to a workspace). See Authentication for details on API key scopes.

The workspace ID to target. **Required** when using an organization-scoped API key; optional for workspace-scoped keys (the key is already tied to a workspace). See [Authentication](https://docs.extend.ai/2026-02-09/developers/authentication) for details on API key scopes.

Response

Successfully retrieved evaluation set

objectenum

The type of object. In this case, it will always be "evaluation_set".

Allowed values:

idstring

The ID of the evaluation set.

Example: "ev_2LcgeY_mp2T5yPaEuq5Lw"

namestring

The name of the evaluation set.

Example: "Invoice Processing Test Set"

descriptionstring

A description of the evaluation set.

Example: "Q4 2023 vendor invoices for accuracy testing"

entityobject

The extractor, classifier, or splitter associated with this evaluation set.

createdAtstringformat: "date-time"

The time (in UTC) at which the object was created. Will follow the RFC 3339 format.

Example: "2024-03-21T16:45:00Z"

updatedAtstringformat: "date-time"

The time (in UTC) at which the object was last updated. Will follow the RFC 3339 format.

Example: "2024-03-21T16:45:00Z"

Errors

400

Bad Request Error

401

Unauthorized Error

402

Payment Required Error

403

Forbidden Error

404

Not Found Error

422

Unprocessable Entity Error

429

Too Many Requests Error

500

Internal Server Error

1	import { ExtendClient } from "extend-ai";
2
3	async function main() {
4	const client = new ExtendClient({
5	token: "YOUR_TOKEN_HERE",
6	extendApiVersion: "2026-02-09",
7	});
8	await client.evaluationSet.get("evaluation_set_id_here", {});
9	}
10	main();

1	{
2	"object": "evaluation_set",
3	"id": "ev_2LcgeY_mp2T5yPaEuq5Lw",
4	"name": "Invoice Processing Test Set",
5	"description": "Q4 2023 vendor invoices for accuracy testing",
6	"entity": {
7	"object": "extractor",
8	"id": "ex_Xj8mK2pL9nR4vT7qY5wZ",
9	"name": "Invoice Extractor",
10	"createdAt": "2024-03-21T16:45:00Z",
11	"updatedAt": "2024-03-21T16:45:00Z"
12	},
13	"createdAt": "2024-03-21T16:45:00Z",
14	"updatedAt": "2024-03-21T16:45:00Z"
15	}