> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://api-docs.hindsiteind.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://api-docs.hindsiteind.com/_mcp/server.

# Post Active Storage Direct Uploads

POST https://app.hindsiteind.com/api/v2/active_storage/direct_uploads
Content-Type: application/json

Starts a file upload. Returns a blob with a one-time upload URL; upload the bytes there, then use the blob's `signed_id` wherever an endpoint takes a file (documents, attachments). Files are limited to 1 GB.

Reference: https://api-docs.hindsiteind.com/hindsite-api/uploads/post-active-storage-direct-uploads

## Authentication

- `Authorization` header (bearer token, required) — OAuth 2.0 Client Credentials Flow. To obtain an access token: 1. Request API credentials from HINDSITE support to receive your `client_id` and `client_secret` 2. Make a POST request to obtain an access token: ``` POST https://app.hindsiteind.com/oauth/token Content-Type: application/x-www-form-urlencoded grant_type=client_credentials&client_id=YOUR_CLIENT_ID&client_secret=YOUR_CLIENT_SECRET ``` 3. The response will contain your access token: ```json { "access_token": "your_access_token_here", "token_type": "Bearer", "expires_in": 7200, "created_at": 1234567890 } ``` 4. Include the token in subsequent API requests: ``` Authorization: Bearer your_access_token_here ```

## Request

### Body (application/json)

This endpoint expects a postV2ActiveStorageDirectUploads.

- `blob` (PostV2ActiveStorageDirectUploadsBlob, required)

## Response

### 201

Blob created. PUT the file bytes to `direct_upload.url` with `direct_upload.headers`, then pass `signed_id` to the endpoint that attaches the file.

- `blob_url` (string, optional)
- `signed_id` (string, optional)
- `filename` (string, optional)
- `byte_size` (integer, optional)
- `content_type` (string, optional)
- `preview_url` (string, optional) — Poster image URL. Present only for previewable blobs (e.g. video).
- `key` (string, optional) — Storage key of the file in Hindsite's file store. Opaque; download the file with blob_url.
- `direct_upload` (ActiveStorageBlobDirectUpload, optional) — Only present on the POST /api/v2/active_storage/presign and POST /api/v2/active_storage/direct_uploads responses, which omit preview_url. PUT the file bytes to url with headers, then reference the blob by signed_id.

## Errors

### 422 Unprocessable Entity Error

File is larger than 1 GB

- `error` (string, optional)
- `message` (string, optional)
- `max_size_mb` (integer, optional)

## Types

### PostV2ActiveStorageDirectUploadsBlob

- `filename` (string, required) — Original file name, e.g. photo.jpg
- `byte_size` (long, required) — File size in bytes
- `checksum` (string, required) — Base64-encoded MD5 digest of the file contents
- `content_type` (string, required) — MIME type, e.g. image/jpeg

### ActiveStorageBlobDirectUpload

Only present on the POST /api/v2/active_storage/presign and POST /api/v2/active_storage/direct_uploads responses, which omit preview_url. PUT the file bytes to url with headers, then reference the blob by signed_id.

- `url` (string, optional) — Pre-signed upload URL, valid for 30 minutes
- `headers` (map from string to string, optional) — HTTP headers to send with the upload, such as Content-Type and Content-MD5

## Examples

**Request**

```json
{
  "blob": {
    "filename": "string",
    "byte_size": 1,
    "checksum": "string",
    "content_type": "string"
  }
}
```

**Response**

```json
{
  "blob_url": "string",
  "signed_id": "string",
  "filename": "string",
  "byte_size": 1,
  "content_type": "string",
  "preview_url": "string",
  "key": "string",
  "direct_upload": {
    "url": "string",
    "headers": {}
  }
}
```

**SDK Code**

```python
import requests

url = "https://app.hindsiteind.com/api/v2/active_storage/direct_uploads"

payload = { "blob": {
        "filename": "string",
        "byte_size": 1,
        "checksum": "string",
        "content_type": "string"
    } }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://app.hindsiteind.com/api/v2/active_storage/direct_uploads';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"blob":{"filename":"string","byte_size":1,"checksum":"string","content_type":"string"}}'
};

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

```go
package main

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

func main() {

	url := "https://app.hindsiteind.com/api/v2/active_storage/direct_uploads"

	payload := strings.NewReader("{\n  \"blob\": {\n    \"filename\": \"string\",\n    \"byte_size\": 1,\n    \"checksum\": \"string\",\n    \"content_type\": \"string\"\n  }\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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
require 'uri'
require 'net/http'

url = URI("https://app.hindsiteind.com/api/v2/active_storage/direct_uploads")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"blob\": {\n    \"filename\": \"string\",\n    \"byte_size\": 1,\n    \"checksum\": \"string\",\n    \"content_type\": \"string\"\n  }\n}"

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

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

HttpResponse<String> response = Unirest.post("https://app.hindsiteind.com/api/v2/active_storage/direct_uploads")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"blob\": {\n    \"filename\": \"string\",\n    \"byte_size\": 1,\n    \"checksum\": \"string\",\n    \"content_type\": \"string\"\n  }\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://app.hindsiteind.com/api/v2/active_storage/direct_uploads', [
  'body' => '{
  "blob": {
    "filename": "string",
    "byte_size": 1,
    "checksum": "string",
    "content_type": "string"
  }
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://app.hindsiteind.com/api/v2/active_storage/direct_uploads");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"blob\": {\n    \"filename\": \"string\",\n    \"byte_size\": 1,\n    \"checksum\": \"string\",\n    \"content_type\": \"string\"\n  }\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = ["blob": [
    "filename": "string",
    "byte_size": 1,
    "checksum": "string",
    "content_type": "string"
  ]] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://app.hindsiteind.com/api/v2/active_storage/direct_uploads")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
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()
```