Get upload part — Brigg developers

Access & visibility

Allow documents.GetUploadPart on your API key.

Workspace access by default. Private member data requires approved member delegation through Brigg-Act-As; the key supplies permissions while private ownership and project boundaries remain enforced.

Set up authentication · Choose permissions

Request fields

Send a JSON object with the following fields. Required fields must be included; omit optional fields you do not need.

upload_idstringRequired

Keep the upload_id and the same credential and acting member throughout the upload. Completion returns a separate file_id. documents.CreateUpload.

At least 1 character.

part_numberintegerRequired

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 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.

urlstringRequired

Absolute URL, including its scheme.

methodstringRequired

HTTP method to use when sending bytes to the temporary transfer URL.

Allowed: "PUT".

expires_atnumberRequired

Expiry time in Unix milliseconds. Obtain a fresh transfer or download URL after expiry.

content_typestringRequired

Media type of the file, such as application/pdf. Null when no binary file exists.

size_bytesintegerRequired

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 and safe retries and limits.

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

Download OpenAPI · Versioning & retirement

JSON schemas

Use the complete schemas for validation or client generation.

Full request JSON schema

{
  "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](/developers/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
    }
  ]
}

Full response JSON schema

{
  "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
    }
  ]
}

Try the request

Use your API key in a server environment.

Act as a memberRequires administrator-approved delegation.

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

Request

cURL

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

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

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

cURL

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

TypeScript

const actAs = process.env.BRIGG_ACT_AS;
if (!actAs) throw new Error("Set BRIGG_ACT_AS to an approved member account ID.");

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

Python

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",
        "Brigg-Act-As": os.environ["BRIGG_ACT_AS"],
    },
    method="POST",
)
try:
    with urlopen(request) as response:
        print(json.load(response))
except HTTPError as error:
    print(error.code, json.load(error))
    raise

200 OK Response example

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

Illustrative values, not a live response.