404 response when trying to call the API for custom extraction model

Hello,

I am getting a 404 error when trying to call the API for a custom extraction model, even though it seems like I have set up all details correctly.

When calling the API I am taking the endpoint URL and Key Microsoft Azure and I am passing the ModelId from Document Intelligence Studio.

HTTP/1.1 404 NotFound

ms-azure-ai-errorcode: NotFound

x-ms-error-code: NotFound

x-envoy-upstream-service-time: 30

apim-request-id: ********

Strict-Transport-Security: max-age=31536000; includeSubDomains; preload

x-content-type-options: nosniff

x-ms-region: East US

Content-Length: 146

Content-Type: application/json; charset=utf-8

Date: Thu, 11 Dec 2025 08:41:28 GMT

{

"error": {

"code": "NotFound",

"message": "Resource not found.",

"innererror": {

  "code": "ModelNotFound",

  "message": "The requested model was not found."

}

}

}

What am I doing wrong? Does the model have to be deployed in some way? In document intelligence studio, the status of the model is "succeeded" . I have labeled and trained the model.