> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.agentverse.ai/v-1/api-reference/storage/upload-asset-contents/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.agentverse.ai/_mcp/server.

# Upload Asset Contents

PUT https://agentverse.ai/v1/storage/assets/{asset_id}/contents/
Content-Type: application/json

Upload the asset contents.

Reference: https://docs.agentverse.ai/v-1/api-reference/storage/upload-asset-contents

## Request

### Path parameters

- `asset_id` (string, required)

### Body (application/json)

This endpoint expects an AssetContent.

- `mime_type` (string, required) — MIME type of the asset content (e.g., 'image/png').
- `contents` (string, required) — Base64-encoded string representing the asset contents.

## Response

### 200

Successful Response

- `asset_id` (string, required) — Unique identifier of the uploaded asset.
- `reference` (string, required) — Internal reference string pointing to the stored asset.

## Errors

### 422 Unprocessable Entity Error

Validation Error

- `detail` (list of ValidationError, optional)

## Types

### ValidationError

- `loc` (list of ValidationErrorLocItems, required)
- `msg` (string, required)
- `type` (string, required)

### ValidationErrorLocItems

## Examples

**Request**

```json
{
  "mime_type": "foo",
  "contents": "foo"
}
```

**Response**

```json
{
  "asset_id": "foo",
  "reference": "foo"
}
```

**SDK Code**

```python storageUploadAssetContentsExample
import requests

url = "https://agentverse.ai/v1/storage/assets/asset_id/contents/"

payload = {
    "mime_type": "foo",
    "contents": "foo"
}
headers = {"Content-Type": "application/json"}

response = requests.put(url, json=payload, headers=headers)

print(response.json())
```

```javascript storageUploadAssetContentsExample
const url = 'https://agentverse.ai/v1/storage/assets/asset_id/contents/';
const options = {
  method: 'PUT',
  headers: {'Content-Type': 'application/json'},
  body: '{"mime_type":"foo","contents":"foo"}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go storageUploadAssetContentsExample
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://agentverse.ai/v1/storage/assets/asset_id/contents/"

	payload := strings.NewReader("{\n  \"mime_type\": \"foo\",\n  \"contents\": \"foo\"\n}")

	req, _ := http.NewRequest("PUT", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby storageUploadAssetContentsExample
require 'uri'
require 'net/http'

url = URI("https://agentverse.ai/v1/storage/assets/asset_id/contents/")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Put.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"mime_type\": \"foo\",\n  \"contents\": \"foo\"\n}"

response = http.request(request)
puts response.read_body
```

```java storageUploadAssetContentsExample
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.put("https://agentverse.ai/v1/storage/assets/asset_id/contents/")
  .header("Content-Type", "application/json")
  .body("{\n  \"mime_type\": \"foo\",\n  \"contents\": \"foo\"\n}")
  .asString();
```

```php storageUploadAssetContentsExample
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('PUT', 'https://agentverse.ai/v1/storage/assets/asset_id/contents/', [
  'body' => '{
  "mime_type": "foo",
  "contents": "foo"
}',
  'headers' => [
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp storageUploadAssetContentsExample
using RestSharp;

var client = new RestClient("https://agentverse.ai/v1/storage/assets/asset_id/contents/");
var request = new RestRequest(Method.PUT);
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"mime_type\": \"foo\",\n  \"contents\": \"foo\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift storageUploadAssetContentsExample
import Foundation

let headers = ["Content-Type": "application/json"]
let parameters = [
  "mime_type": "foo",
  "contents": "foo"
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://agentverse.ai/v1/storage/assets/asset_id/contents/")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "PUT"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```

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