EndpointsEvaluation

Create Evaluation Set Items

Evaluation set items are the individual files and expected outputs that are used to evaluate the performance of a given extractor, classifier, or splitter in Extend. This endpoint will create new evaluation set items in Extend, which will be used during an evaluation run. **Limit:** You can create up to 100 items at a time. Learn more about how to create evaluation set items in the [Evaluation Sets](https://docs.extend.ai/2026-02-09/product/evaluation/overview) product page.

Authentication

AuthorizationBearer

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

Path parameters

evaluationSetIdstringRequired

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](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](https://docs.extend.ai/2026-02-09/developers/authentication) for details on API key scopes.

Request

This endpoint expects an object.
itemslist of objectsRequired
An array of objects representing the evaluation set items to create.

Response

Evaluation set items created successfully
evaluationSetItemslist of objects

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