curl --request POST \
--url https://api.arcuserp.com/v1/purchase-orders/{id}/send-to-vendor \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"to_email": "jsmith@example.com",
"stamp_only": false,
"send_mode": "email",
"template_key_override": "po_revised",
"revision_number": 123,
"changed_fields": "<string>"
}
'import requests
url = "https://api.arcuserp.com/v1/purchase-orders/{id}/send-to-vendor"
payload = {
"to_email": "jsmith@example.com",
"stamp_only": False,
"send_mode": "email",
"template_key_override": "po_revised",
"revision_number": 123,
"changed_fields": "<string>"
}
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({
to_email: 'jsmith@example.com',
stamp_only: false,
send_mode: 'email',
template_key_override: 'po_revised',
revision_number: 123,
changed_fields: '<string>'
})
};
fetch('https://api.arcuserp.com/v1/purchase-orders/{id}/send-to-vendor', 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}/send-to-vendor",
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([
'to_email' => 'jsmith@example.com',
'stamp_only' => false,
'send_mode' => 'email',
'template_key_override' => 'po_revised',
'revision_number' => 123,
'changed_fields' => '<string>'
]),
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/purchase-orders/{id}/send-to-vendor"
payload := strings.NewReader("{\n \"to_email\": \"jsmith@example.com\",\n \"stamp_only\": false,\n \"send_mode\": \"email\",\n \"template_key_override\": \"po_revised\",\n \"revision_number\": 123,\n \"changed_fields\": \"<string>\"\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/purchase-orders/{id}/send-to-vendor")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"to_email\": \"jsmith@example.com\",\n \"stamp_only\": false,\n \"send_mode\": \"email\",\n \"template_key_override\": \"po_revised\",\n \"revision_number\": 123,\n \"changed_fields\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.arcuserp.com/v1/purchase-orders/{id}/send-to-vendor")
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 \"to_email\": \"jsmith@example.com\",\n \"stamp_only\": false,\n \"send_mode\": \"email\",\n \"template_key_override\": \"po_revised\",\n \"revision_number\": 123,\n \"changed_fields\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"po_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"po_number": "<string>",
"sent_to": "jsmith@example.com",
"sent_at": "2023-11-07T05:31:56Z",
"revision_send": true,
"revision_number": 123
}{
"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>""<unknown>"Send a purchase order to vendor
Emails a purchase order to its vendor using the entity’s purchase-order template, or records it as sent externally without emailing when the vendor was contacted outside Arcus; a revision resend uses a dedicated revision template, and a stamp-only send records sent_at without dispatching a new email. Requires purchasing:write scope, and is refused with 422 when the order is pending approval, cancelled, or missing a vendor email address.
curl --request POST \
--url https://api.arcuserp.com/v1/purchase-orders/{id}/send-to-vendor \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"to_email": "jsmith@example.com",
"stamp_only": false,
"send_mode": "email",
"template_key_override": "po_revised",
"revision_number": 123,
"changed_fields": "<string>"
}
'import requests
url = "https://api.arcuserp.com/v1/purchase-orders/{id}/send-to-vendor"
payload = {
"to_email": "jsmith@example.com",
"stamp_only": False,
"send_mode": "email",
"template_key_override": "po_revised",
"revision_number": 123,
"changed_fields": "<string>"
}
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({
to_email: 'jsmith@example.com',
stamp_only: false,
send_mode: 'email',
template_key_override: 'po_revised',
revision_number: 123,
changed_fields: '<string>'
})
};
fetch('https://api.arcuserp.com/v1/purchase-orders/{id}/send-to-vendor', 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}/send-to-vendor",
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([
'to_email' => 'jsmith@example.com',
'stamp_only' => false,
'send_mode' => 'email',
'template_key_override' => 'po_revised',
'revision_number' => 123,
'changed_fields' => '<string>'
]),
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/purchase-orders/{id}/send-to-vendor"
payload := strings.NewReader("{\n \"to_email\": \"jsmith@example.com\",\n \"stamp_only\": false,\n \"send_mode\": \"email\",\n \"template_key_override\": \"po_revised\",\n \"revision_number\": 123,\n \"changed_fields\": \"<string>\"\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/purchase-orders/{id}/send-to-vendor")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"to_email\": \"jsmith@example.com\",\n \"stamp_only\": false,\n \"send_mode\": \"email\",\n \"template_key_override\": \"po_revised\",\n \"revision_number\": 123,\n \"changed_fields\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.arcuserp.com/v1/purchase-orders/{id}/send-to-vendor")
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 \"to_email\": \"jsmith@example.com\",\n \"stamp_only\": false,\n \"send_mode\": \"email\",\n \"template_key_override\": \"po_revised\",\n \"revision_number\": 123,\n \"changed_fields\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"po_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
"po_number": "<string>",
"sent_to": "jsmith@example.com",
"sent_at": "2023-11-07T05:31:56Z",
"revision_send": true,
"revision_number": 123
}{
"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>""<unknown>"Authorizations
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
Optional idempotency key for safe retries (Stripe-style).
255Path Parameters
Body
Override the destination email. When omitted, defaults to
the vendor account's email. Required (either here or on
the vendor) unless stamp_only=true.
When true, stamps sent_at + last_notified_revision
without dispatching an email (the email has already been
sent through a separate path). Skips the to_email /
vendor-email guard.
email (default) sends the vendor an email via the canonical
sendDocument helper. external marks the PO as sent WITHOUT
dispatching an email (the vendor was contacted outside Arcus) --
same atomic draft->open + sent_at stamp + broadcast, no
communication log row, audited as po_marked_sent_external, and
the vendor-email guard is skipped. Mutually independent of
stamp_only; both skip the email dispatch.
email, external When set to po_revised, uses the revision-send template
instead of the default purchase-order template. Combine
with revision_number and changed_fields for context.
po_revised The revision number being sent (e.g. 2 for the second
send after the initial first-send 1). Used only when
template_key_override='po_revised'.
Human-readable summary of what changed between revisions
(e.g. "line quantity, due date"). Rendered in the revision
email template. Used only when
template_key_override='po_revised'.
Response
Purchase order sent (or stamped). Returns the canonical send result.
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