# Get upload part

Get a temporary PUT URL for one upload part. Use part 1 for a single upload. Request a new URL to retry an expired transfer; CompleteUpload collects multipart receipts for you.

POST https://api.brigg.app/v1/operations/documents.GetUploadPart

## Access & visibility

Allow `documents.GetUploadPart` on your API key.

**Workspace access by default.** Private member data requires [approved member delegation](https://developer.brigg.app/authentication#member-delegation) through `Brigg-Act-As`; the key supplies permissions while private ownership and project boundaries remain enforced.

[Set up authentication](https://developer.brigg.app/authentication) · [Choose permissions](https://developer.brigg.app/permissions)

## Request fields

Send a JSON object with the following fields. Required fields must be included; omit optional fields you do not need.
| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `upload_id` | string | Yes | Keep the upload_id and the same credential and acting member throughout the upload. Completion returns a separate file_id. [documents.CreateUpload](https://developer.brigg.app/reference/documents/CreateUpload). At least 1 character. |
| `part_number` | integer | Yes | One-based part number. Use 1 for a single upload; for multipart uploads, transfer every part from 1 through part_count. Greater than 0. |

## Where this fits in an upload

The [file guide](https://developer.brigg.app/files) includes a streaming Node.js helper and the complete HTTP sequence: create an upload, request a signed URL for each part, PUT the bytes directly to that URL, then complete the upload. Never send the Brigg API key to a transfer URL.

Keep the same credential and acting member for every step. Follow the returned part size and count rather than imposing your own split. Completing with only `upload_id` lets Brigg collect part receipts. A successful byte transfer is not a completed file: verification and scanning must finish before you receive a usable `file_id`.

Retain `upload_id` for recovery. Read its state before retransferring an interrupted upload; `ready` returns the existing file ID, while an expired upload requires a new start. Temporary transfer URLs and completed file IDs have different lifetimes.

## Response

Returns **200 OK** with a JSON body.
| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `url` | string | Yes | Absolute URL, including its scheme. |
| `method` | string | Yes | HTTP method to use when sending bytes to the temporary transfer URL. Allowed: `"PUT"`. |
| `expires_at` | number | Yes | Expiry time in Unix milliseconds. Obtain a fresh transfer or download URL after expiry. |
| `content_type` | string | Yes | Media type of the file, such as application/pdf. Null when no binary file exists. |
| `size_bytes` | integer | Yes | File size in bytes. Null for a document without a downloadable binary file. |

## Errors & retries

This operation reads data. It needs no idempotency key and can be retried after a transient failure.

For rate limits, follow the server’s retry guidance and back off. See [HTTP errors](https://developer.brigg.app/http#errors) and [safe retries and limits](https://developer.brigg.app/reliability).

| HTTP status | Code | What to do |
| --- | --- | --- |
| 400 | `invalid_json` | Send a JSON object with Content-Type: application/json. |
| 400 | `invalid_input` | Check the request fields and types. |
| 401 | `invalid_key` | The workspace API key is missing, invalid or revoked. |
| 403 | `forbidden` | Check the key’s operation and resource grants. If Brigg-Act-As is supplied, the key must be authorized to delegate to that member. |
| 404 | `not_found` | The requested operation or resource is not available to this credential. |
| 429 | `rate_limited` | Wait for Retry-After before retrying. |

## Next steps

- [Create upload](https://developer.brigg.app/reference/documents/CreateUpload)
- [Complete upload](https://developer.brigg.app/reference/documents/CompleteUpload)
- [Get upload](https://developer.brigg.app/reference/documents/GetUpload)
- [Upload and download files](https://developer.brigg.app/files)

[Download OpenAPI](https://developer.brigg.app/openapi.json) · [Versioning & retirement](https://developer.brigg.app/versioning)

## Examples

### Example request

Fictional values. Replace IDs and business details with values from your workspace.
#### cURL


```sh
curl 'https://api.brigg.app/v1/operations/documents.GetUploadPart' \
  -H "Authorization: Bearer $BRIGG_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-raw '{
  "upload_id": "upl_example",
  "part_number": 1
}'
```

#### TypeScript


```typescript
const response = await fetch("https://api.brigg.app/v1/operations/documents.GetUploadPart", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.BRIGG_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "upload_id": "upl_example",
    "part_number": 1
  }),
});
const result = await response.json();
if (!response.ok) throw new Error(`${response.status}: ${result.error} — ${result.message}`);
console.log(result);
```

#### Python


```python
import json
import os
from urllib.request import Request, urlopen
from urllib.error import HTTPError

payload = {
  "upload_id": "upl_example",
  "part_number": 1
}
request = Request(
    "https://api.brigg.app/v1/operations/documents.GetUploadPart",
    data=json.dumps(payload).encode("utf-8"),
    headers={
        "Authorization": f"Bearer {os.environ['BRIGG_API_KEY']}",
        "Content-Type": "application/json",
    },
    method="POST",
)
try:
    with urlopen(request) as response:
        print(json.load(response))
except HTTPError as error:
    print(error.code, json.load(error))
    raise
```

#### Response example


```json
{
  "url": "https://example.com/temporary-upload",
  "method": "PUT",
  "expires_at": 1794301800000,
  "content_type": "application/pdf",
  "size_bytes": 48231
}
```

## JSON schemas


```json-schema-request
{
  "type": "object",
  "properties": {
    "upload_id": {
      "type": "string",
      "minLength": 1,
      "description": "Keep the upload_id and the same credential and acting member throughout the upload. Completion returns a separate file_id. [documents.CreateUpload](https://developer.brigg.app/reference/documents/CreateUpload)."
    },
    "part_number": {
      "type": "integer",
      "exclusiveMinimum": 0,
      "description": "One-based part number. Use 1 for a single upload; for multipart uploads, transfer every part from 1 through part_count."
    }
  },
  "required": [
    "upload_id",
    "part_number"
  ],
  "additionalProperties": false,
  "examples": [
    {
      "upload_id": "upl_example",
      "part_number": 1
    }
  ]
}
```


```json-schema-response
{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "Absolute URL, including its scheme."
    },
    "method": {
      "type": "string",
      "enum": [
        "PUT"
      ],
      "description": "HTTP method to use when sending bytes to the temporary transfer URL."
    },
    "expires_at": {
      "type": "number",
      "description": "Expiry time in Unix milliseconds. Obtain a fresh transfer or download URL after expiry."
    },
    "content_type": {
      "type": "string",
      "description": "Media type of the file, such as application/pdf. Null when no binary file exists."
    },
    "size_bytes": {
      "type": "integer",
      "description": "File size in bytes. Null for a document without a downloadable binary file."
    }
  },
  "required": [
    "url",
    "method",
    "expires_at",
    "content_type",
    "size_bytes"
  ],
  "additionalProperties": false,
  "examples": [
    {
      "url": "https://example.com/temporary-upload",
      "method": "PUT",
      "expires_at": 1794301800000,
      "content_type": "application/pdf",
      "size_bytes": 48231
    }
  ]
}
```