Pack an order with Arcus Mighty (auto-pack)

curl --request POST \
  --url https://api.arcuserp.com/v1/fulfillment/pack-order \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "order_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "auto_rate": true,
  "auto_buy_label": true
}
'

import requests

url = "https://api.arcuserp.com/v1/fulfillment/pack-order"

payload = {
    "order_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "auto_rate": True,
    "auto_buy_label": True
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    order_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    auto_rate: true,
    auto_buy_label: true
  })
};

fetch('https://api.arcuserp.com/v1/fulfillment/pack-order', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.arcuserp.com/v1/fulfillment/pack-order",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'order_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'auto_rate' => true,
    'auto_buy_label' => true
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://api.arcuserp.com/v1/fulfillment/pack-order"

	payload := strings.NewReader("{\n  \"order_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"auto_rate\": true,\n  \"auto_buy_label\": true\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(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.arcuserp.com/v1/fulfillment/pack-order")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"order_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"auto_rate\": true,\n  \"auto_buy_label\": true\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.arcuserp.com/v1/fulfillment/pack-order")

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  \"order_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"auto_rate\": true,\n  \"auto_buy_label\": true\n}"

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

{
  "data": {
    "packages": [
      {
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "object": "package",
        "entity_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "order_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "package_number": "<string>",
        "weight_lb": 123,
        "length_in": 123,
        "width_in": 123,
        "height_in": 123,
        "carrier": "<string>",
        "service_level": "<string>",
        "tracking_number": "<string>",
        "tracking_url": "<string>",
        "ship_cost": 123,
        "billed_ship_cost": 123,
        "location_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "insurance_amount_override": 123,
        "insurance": {
          "active": true,
          "bought": true,
          "amount": 123,
          "currency": "<string>",
          "fee_estimate": 123,
          "provider": "<string>",
          "covered_items": [
            "<string>"
          ],
          "covered_item_count": 123
        },
        "shipped_at": "2023-11-07T05:31:56Z",
        "delivered_at": "2023-11-07T05:31:56Z",
        "metadata": {},
        "created_at": "2023-11-07T05:31:56Z",
        "updated_at": "2023-11-07T05:31:56Z"
      }
    ],
    "leftovers": [
      {
        "order_item_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "sku": "<string>",
        "product_name": "<string>",
        "remaining_qty": 123,
        "reason": "<string>"
      }
    ],
    "shipping_score": 123,
    "box_count": 123,
    "auto_rate_on_pack": true,
    "auto_buy_label_on_pack": true,
    "package_rates": {},
    "package_auto_labels": {}
  }
}

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}

Fulfillment

Pack an order with Arcus Mighty (auto-pack)

Rule 25 dual-dispatch fix (2026-05-29): This endpoint was previously only accessible via Cognito-JWT (/fulfillment/pack-order); API-key callers received 404. packOrderV1 is now wired in routes/api-v1/fulfillment.mjs per Rule 25.

Runs the Arcus Mighty 3D bin-packing algorithm against an unpacked (or partially packed) order. Creates one or more Package objects optimally sized to the entity’s active box inventory, allocates inventory, and (if configured) auto-rates and auto-buys Shippo labels in the same call.

Authorization: requires fulfillment:write API-key scope AND the per-user fulfillment.pack permission (SoD assertion inside canonical handler).

Layer 1: entity_id is always derived from the API key; any entity_id in the request body is silently overwritten.

THE ONE RULE: delegates to the canonical packOrder handler in routes/fulfillment.mjs. All Mighty logic (bin-packing, location-shortfall guard, label auto-buy, leftover persistence, incident-id error correlation) lives in the canonical handler; bug fixes propagate automatically.

Idempotency: idempotent per Idempotency-Key header. If the order is already fully packed, returns 409 all_items_already_packed.

Key request body fields:

order_id (required, UUID): the order to pack
auto_rate (boolean, optional): fetch Shippo rates for each created package
auto_buy_label (boolean, optional): purchase Shippo label for each package (requires auto_rate: true and a configured shipping rule)

Blocker codes (422):

location_shortfall_blocks_pack: all packable lines are out of stock at the order’s location. Response includes short_lines[] with cross-location stock.
ship_complete_blocked: ship_complete=true and one or more lines have insufficient inventory to fully pack.
packpilot_no_boxes: no active box products are configured for this entity.
packpilot_circuit_open: Mighty Lambda is unavailable; use Manual Pack.
packpilot_item_too_large: at least one line item exceeds the largest box.
repack_blocked_label_void_failed: a repack was attempted but an existing Shippo label could not be voided; resolve carrier-side before repacking.

POST

fulfillment

pack-order

Pack an order with Arcus Mighty (auto-pack)

curl --request POST \
  --url https://api.arcuserp.com/v1/fulfillment/pack-order \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "order_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "auto_rate": true,
  "auto_buy_label": true
}
'

import requests

url = "https://api.arcuserp.com/v1/fulfillment/pack-order"

payload = {
    "order_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "auto_rate": True,
    "auto_buy_label": True
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    order_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    auto_rate: true,
    auto_buy_label: true
  })
};

fetch('https://api.arcuserp.com/v1/fulfillment/pack-order', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.arcuserp.com/v1/fulfillment/pack-order",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'order_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'auto_rate' => true,
    'auto_buy_label' => true
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://api.arcuserp.com/v1/fulfillment/pack-order"

	payload := strings.NewReader("{\n  \"order_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"auto_rate\": true,\n  \"auto_buy_label\": true\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(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.arcuserp.com/v1/fulfillment/pack-order")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"order_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"auto_rate\": true,\n  \"auto_buy_label\": true\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.arcuserp.com/v1/fulfillment/pack-order")

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  \"order_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"auto_rate\": true,\n  \"auto_buy_label\": true\n}"

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

{
  "data": {
    "packages": [
      {
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "object": "package",
        "entity_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "order_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "package_number": "<string>",
        "weight_lb": 123,
        "length_in": 123,
        "width_in": 123,
        "height_in": 123,
        "carrier": "<string>",
        "service_level": "<string>",
        "tracking_number": "<string>",
        "tracking_url": "<string>",
        "ship_cost": 123,
        "billed_ship_cost": 123,
        "location_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "insurance_amount_override": 123,
        "insurance": {
          "active": true,
          "bought": true,
          "amount": 123,
          "currency": "<string>",
          "fee_estimate": 123,
          "provider": "<string>",
          "covered_items": [
            "<string>"
          ],
          "covered_item_count": 123
        },
        "shipped_at": "2023-11-07T05:31:56Z",
        "delivered_at": "2023-11-07T05:31:56Z",
        "metadata": {},
        "created_at": "2023-11-07T05:31:56Z",
        "updated_at": "2023-11-07T05:31:56Z"
      }
    ],
    "leftovers": [
      {
        "order_item_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "sku": "<string>",
        "product_name": "<string>",
        "remaining_qty": 123,
        "reason": "<string>"
      }
    ],
    "shipping_score": 123,
    "box_count": 123,
    "auto_rate_on_pack": true,
    "auto_buy_label_on_pack": true,
    "package_rates": {},
    "package_auto_labels": {}
  }
}

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}

{
  "error": "not_found",
  "code": "not_found",
  "type": "not_found",
  "hint": "The requested order does not exist or does not belong to this entity.",
  "param": "expand[0]",
  "required": "accounts:read",
  "request_id": "req_abc123"
}

Authorizations

Authorization

string

header

required

API key issued per entity via Settings > Developers > API Keys. Each key carries scopes (e.g. orders:read, products:write). Bearer token format: Authorization: Bearer ark_live_ent_Test keys use ark_test_ent_. Both are issued per entity via Settings > Developers > API Keys.

Headers

Idempotency-Key

string

Client-generated unique key for idempotent POST/PATCH/DELETE operations. Alias for the Idempotency parameter. Max 255 chars. On retry with the same key, the original response is returned without re-executing the operation. Keys expire after 24 hours.

Maximum string length: 255

Body

application/json

order_id

string<uuid>

required

The order to pack. Must be confirmed, not yet fully fulfilled.

auto_rate

boolean

Fetch Shippo carrier rates for each created package immediately after packing.

auto_buy_label

boolean

Purchase a Shippo label for each package using the best matching shipping rule. Requires auto_rate: true. If label purchase fails for a package, the error is returned in package_auto_labels[pkg_id].error (non-fatal).

Response

Order packed successfully.

data

object

Show child attributes

Retrieve a single shipping label Recalculate estimated delivery date for a package (canonical V1 path)

Overview

All Endpoints

Pack an order with Arcus Mighty (auto-pack)

Authorizations

Headers

Body

Response