Upload File
Upload and create a new file in Extend.
This endpoint accepts file contents and registers them as a File in Extend, which can be used for [running workflows](https://docs.extend.ai/2025-04-21/developers/api-reference/workflow-endpoints/run-workflow), [creating evaluation set items](https://docs.extend.ai/2025-04-21/developers/api-reference/evaluation-set-endpoints/bulk-create-evaluation-set-items), [parsing](https://docs.extend.ai/2025-04-21/developers/api-reference/parse-endpoints/parse-file), etc.
If an uploaded file is detected as a Word or PowerPoint document, it will be automatically converted to a PDF.
Supported file types can be found [here](/product/general/supported-file-types).
This endpoint requires multipart form encoding. Most HTTP clients will handle this encoding automatically (see the examples).
Authentication
AuthorizationBearer
Bearer authentication of the form Bearer <token>, where token is your auth token.
Headers
x-extend-api-version
API version to use for the request. If you 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.
Request
This endpoint expects a multipart form containing a file.
file
The file contents to upload
Response
Successfully uploaded file
success
file
