# Get upload URL

Generate a resumable upload URL for large files that exceed the direct upload limit.

Returns a signed, resumable upload URL for uploading large files (>31 MB). After uploading the file to the signed URL, call [Register upload](/docs/api-reference/knowledge/register-upload) to add the file to the store and start processing.

#### Path Parameters

**`organization_id`** string required

The unique identifier of the organization (format: `org_*`).

**`store_id`** string required

The unique identifier of the vector store.

#### Request Body

**`file_name`** string required

The name of the file (1-255 characters).

**`file_size`** integer required

The file size in bytes (must be greater than 0).

**`mime_type`** string required

The MIME type of the file.

**`relative_path`** string optional

A relative path within the store for folder uploads.

## Returns

An object containing the upload session URL, recommended chunk size, and expiry time.

Request

```bash cURL
curl -X POST "https://api.aitronos.com/v1/organizations/org_xyz789/stores/vs_abc123/files/upload-url" \
  -H "Authorization: Bearer $ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "file_name": "large-dataset.csv",
    "file_size": 104857600,
    "mime_type": "text/csv",
    "relative_path": "data/imports"
  }'
```


```python Python SDK
from aitronos import Aitronos

client = Aitronos(api_key="your-api-key")

result = client.knowledge.get_upload_url(
    organization_id="org_xyz789",
    store_id="vs_abc123",
    file_name="large-dataset.csv",
    file_size=104857600,
    mime_type="text/csv",
    relative_path="data/imports",
)
print(result)
```


```python Python
import requests

org_id = "org_xyz789"
store_id = "vs_abc123"
url = f"https://api.aitronos.com/v1/organizations/{org_id}/stores/{store_id}/files/upload-url"
headers = {
    "Authorization": "Bearer YOUR_ACCESS_TOKEN",
    "Content-Type": "application/json",
}
data = {
    "file_name": "large-dataset.csv",
    "file_size": 104857600,
    "mime_type": "text/csv",
    "relative_path": "data/imports",
}

response = requests.post(url, headers=headers, json=data)
print(response.json())
```


```javascript JavaScript
const orgId = "org_xyz789";
const storeId = "vs_abc123";

const response = await fetch(
  `https://api.aitronos.com/v1/organizations/${orgId}/stores/${storeId}/files/upload-url`,
  {
    method: "POST",
    headers: {
      Authorization: `Bearer ${accessToken}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      file_name: "large-dataset.csv",
      file_size: 104857600,
      mime_type: "text/csv",
      relative_path: "data/imports",
    }),
  }
);

const data = await response.json();
console.log(data);
```

Response

```json 200 OK
{
  "upload_id": "file_abc123def456",
  "signed_url": "https://storage.googleapis.com/...",
  "chunk_size": 8388608,
  "expires_at": "2025-06-15T11:00:00Z"
}
```


```json 404 Error
{
  "success": false,
  "error": {
    "code": "VECTOR_STORE_NOT_FOUND",
    "message": "We couldn't find the requested resource.",
    "system_message": "Vector store not found",
    "type": "client_error",
    "status": 404,
    "details": { "store_id": "vs_abc123", "organization_id": "org_xyz789" },
    "trace_id": "abc-123-def",
    "timestamp": "2025-06-15T10:00:00Z"
  }
}
```

## Related Resources

- [Upload File](/docs/api-reference/knowledge/upload-file)
- [Register Upload](/docs/api-reference/knowledge/register-upload)
- [List Files](/docs/api-reference/knowledge/list-files)
- [Get File](/docs/api-reference/knowledge/get-file)
- [Delete File](/docs/api-reference/knowledge/delete-file)
- [Bulk Remove Files](/docs/api-reference/knowledge/bulk-remove)
- [Processing Status](/docs/api-reference/knowledge/processing-status)
- [Processing Logs](/docs/api-reference/knowledge/processing-logs)
- [Retry Processing](/docs/api-reference/knowledge/retry-processing)
- [File Config](/docs/api-reference/knowledge/file-config)
- [Storage Usage](/docs/api-reference/knowledge/storage-usage)