Remove a purchase order line item

curl --request DELETE \
  --url https://api.arcuserp.com/v1/purchase-orders/{id}/items/{itemId} \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://api.arcuserp.com/v1/purchase-orders/{id}/items/{itemId}"

headers = {"Authorization": "Bearer <token>"}

response = requests.delete(url, headers=headers)

print(response.text)

const options = {method: 'DELETE', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.arcuserp.com/v1/purchase-orders/{id}/items/{itemId}', 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/purchase-orders/{id}/items/{itemId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "DELETE",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.arcuserp.com/v1/purchase-orders/{id}/items/{itemId}"

	req, _ := http.NewRequest("DELETE", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

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

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

	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://api.arcuserp.com/v1/purchase-orders/{id}/items/{itemId}")

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

request = Net::HTTP::Delete.new(url)
request["Authorization"] = 'Bearer <token>'

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

{
  "deleted": true,
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "unlinked_dropship_order_ids": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ]
}

{
  "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"
}

"<unknown>"

Purchasing

Remove a purchase order line item

Removes a line from a purchase order.

Added 2026-08-17 (campaign PO-LINE-EDIT). The internal application has always had this verb; the public API had POST /items and PATCH /items/{itemId} and no DELETE, so an API-key caller could add and edit a line but could only “undo” an add by patching its quantity down.

Eligibility is stricter than for an edit, because a delete destroys the line’s identity rather than changing it:

draft: allowed.
open: allowed ONLY while the line has zero received units (422 line_has_receipts otherwise — reduce the quantity to what arrived, or close the purchase order short).
processing: never (422 delete_blocked_on_processing) — the order carries inventory layers and a three-way-match baseline.
fulfilled / cancelled / archived / expired, or any status this predicate has not ruled on: never.
While awaiting approval: never.

A line with dependent records (receipts, vendor-bill lines, inventory transactions, serials, allocations, backorders, returns, package items, landed-cost attributions, or child lines) is refused with 422 line_has_dependent_records and the body names the blocking relations in blockers. Previously such a delete surfaced as an unstructured 500.

Side effects (THE ONE RULE — same canonical handler as the in-app delete), all inside one transaction: unlinks any sales-order lines that were drop-shipping this exact product through this purchase order, decrements the on_purchase_order cache by the unreceived quantity, recomputes the purchase-order header total, bumps revision_count on a sent order, and emits Rule 13 broadcasts plus a po_item_removed (or po_revised) activity entry.

Required API key scope: purchasing:write

DELETE

purchase-orders

{id}

items

{itemId}

Remove a purchase order line item

curl --request DELETE \
  --url https://api.arcuserp.com/v1/purchase-orders/{id}/items/{itemId} \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://api.arcuserp.com/v1/purchase-orders/{id}/items/{itemId}"

headers = {"Authorization": "Bearer <token>"}

response = requests.delete(url, headers=headers)

print(response.text)

const options = {method: 'DELETE', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.arcuserp.com/v1/purchase-orders/{id}/items/{itemId}', 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/purchase-orders/{id}/items/{itemId}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "DELETE",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.arcuserp.com/v1/purchase-orders/{id}/items/{itemId}"

	req, _ := http.NewRequest("DELETE", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

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

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

	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://api.arcuserp.com/v1/purchase-orders/{id}/items/{itemId}")

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

request = Net::HTTP::Delete.new(url)
request["Authorization"] = 'Bearer <token>'

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

{
  "deleted": true,
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "unlinked_dropship_order_ids": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ]
}

{
  "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"
}

"<unknown>"

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

Optional idempotency key for safe retries (Stripe-style).

Maximum string length: 255

Path Parameters

string<uuid>

required

The purchase order id.

itemId

string<uuid>

required

The PO line item (order_item) id to edit.

Response

Line removed. unlinked_dropship_order_ids lists any sales orders whose drop-ship link to this purchase order was cleared as a result (empty on every non-drop-ship delete).

deleted

boolean

string<uuid>

unlinked_dropship_order_ids

string<uuid>[]

Overview

All Endpoints

Remove a purchase order line item

Authorizations

Headers

Path Parameters

Response