REST-API Endpoint #2038

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Steps to reproduce

1. Create a dataset in Nextcloud Analytics (Internal Database type)

2. Send a POST request to the v3.0 or v4.0 API endpoint: /apps/analytics/api/3.0/data/{datasetId}/add or /apps/analytics/api/4.0/data/{datasetId}/add

3. Use Basic Auth with the same account that owns the dataset

4. Send the following JSON body:

{

  "data": [

    {

      "dimension1": "2026-05-25 12:00:00",

      "dimension2": "Test",

      "value": "42"

    }

  ]

}

5. Observe the response

Expected behaviour

Data is stored in the dataset and the API returns:

{ "success": true, "message": "Data update successful" }

Actual behaviour

Actual behaviour

The API returns error code 9003 when using v3.0 or v4.0 endpoints with the documented URL format:

json

{
"success": false,
"error": {
"code": 9003,
"message": "Unknown or unauthorized report or dataset"
}
}

Workarounds that do work:

Legacy v2.0 endpoint: /apps/analytics/api/2.0/adddata/{datasetId} ✅

v3.0 endpoint works only when sending body as Raw with application/json content type (not as structured JSON): /apps/analytics/api/3.0/data/{datasetId}/add ✅

Same applies to v4.0: /apps/analytics/api/4.0/data/{datasetId}/add ✅

When using structured JSON body (as documented), all three versions return 9003. Only the Raw body format triggers successful data ingestion on v3.0 and v4.0. The v2.0 endpoint works with both body formats.

This suggests the issue is in how v3.0/v4.0 parses the request body when sent as structured JSON from HTTP clients like Postman or n8n.

Server configuration

Web server: Apache/Nginx

Database: MySQL/MariaDB

PHP version: 8.2/8.3/8.4

Nextcloud version: Hetzner managed Nextcloud instance, no command line access available

No command line access available (managed Nextcloud instance).

Analytics app is installed and active.

No command line access available (managed Nextcloud instance).

Browser

Browser name: Firefox

Browser version: latest

Operating system: Windows

Tested via Postman and n8n HTTP Request node.

Postman confirmed: v3.0 and v4.0 return 9003, v2.0 returns success.

Content-Type: application/json

Authentication: Basic Auth (dataset owner account)