Delete knowledge base¶

Deletes the knowledge base and its definitions; the Catalog tables and files containing the source are not deleted. Before deleting, please confirm that the agent, workflow, or application no longer references the knowledge base.

DELETE https://api.moi.matrixorigin.cn/v5/semantic-models/{model_id}

Preparation before calling¶

First query the knowledge base details and confirm the knowledge base to be deleted. Prepare a personal access token and target workspace ID that has access to the target workspace.

The example below uses:

$AI_STUDIO_API_KEY: The actual personal access token, passed through the X-API-Key Header.
$WORKSPACE_ID: Target workspace ID, passed through X-Workspace-ID Header.
$MODEL_ID: ID of the knowledge base to be deleted.

Request example¶

curl -X DELETE "https://api.moi.matrixorigin.cn/v5/semantic-models/$MODEL_ID" \
  -H "X-API-Key: $AI_STUDIO_API_KEY" \
  -H "X-Workspace-ID: $WORKSPACE_ID"

Path parameters¶

Parameters	Type	Description
`model_id`	integer	The ID of the knowledge base to be deleted.

Successful response¶

After a successful request, the target knowledge base no longer exists. Deletion is idempotent: a target that is already absent also returns success. code: "OK" and data.deleted: true indicate that the deletion request completed; this result does not count how many existing knowledge bases the request removed.

{
  "code": "OK",
  "msg": "OK",
  "data": {
    "deleted": true
  }
}

The response fields are as follows.

Field	Type	Description
`code`	string	`OK` on success.
`msg`	string	`OK` on success.
`data.deleted`	boolean	`true` indicates that the deletion request completed, including when the target was already absent.

Error response¶

A knowledge base ID that is not a positive integer returns HTTP 400 and ErrParamInvalid.

{
  "code": "ErrParamInvalid",
  "msg": "invalid model id",
  "data": null
}

Common HTTP errors¶

HTTP status code	error code	Common causes	Recommended actions
`400`	`ErrParamInvalid`	`model_id` is not a positive integer.	Use the knowledge base `id` in the response.
`401`	`ErrUnauthorized`	The API Key is invalid or has expired.	Check API Key.
`403`	`ErrForbidden`	The caller does not have permission to delete the knowledge base.	Check workspace and object authorization.
`409`	`ErrConflict`	The service rejects the current delete operation.	Handle the object or state pointed to by the conflict first.
`500`	`ErrServer`	The service failed to complete deletion.	Keep the desensitized response information and try again.

Follow-up operations¶

Query the knowledge base list Confirm that the knowledge base has been removed.

Last updated on Oct 19, 2026