Issued invoice status request
curl --request POST \
--url https://api.m4psp.com/gateway/v1/invoice/check \
--header 'Content-Type: application/json' \
--data '
{
"shop_order_id": "5b0efa8a-153b-4421-abac-2aba4d772a86",
"shop_id": 1520,
"now": "2026-05-24T16:35:42"
}
'import requests
url = "https://api.m4psp.com/gateway/v1/invoice/check"
payload = {
"shop_order_id": "5b0efa8a-153b-4421-abac-2aba4d772a86",
"shop_id": 1520,
"now": "2026-05-24T16:35:42"
}
headers = {"Content-Type": "application/json"}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify({
shop_order_id: '5b0efa8a-153b-4421-abac-2aba4d772a86',
shop_id: 1520,
now: '2026-05-24T16:35:42'
})
};
fetch('https://api.m4psp.com/gateway/v1/invoice/check', 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.m4psp.com/gateway/v1/invoice/check",
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([
'shop_order_id' => '5b0efa8a-153b-4421-abac-2aba4d772a86',
'shop_id' => 1520,
'now' => '2026-05-24T16:35:42'
]),
CURLOPT_HTTPHEADER => [
"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.m4psp.com/gateway/v1/invoice/check"
payload := strings.NewReader("{\n \"shop_order_id\": \"5b0efa8a-153b-4421-abac-2aba4d772a86\",\n \"shop_id\": 1520,\n \"now\": \"2026-05-24T16:35:42\"\n}")
req, _ := http.NewRequest("POST", url, payload)
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.m4psp.com/gateway/v1/invoice/check")
.header("Content-Type", "application/json")
.body("{\n \"shop_order_id\": \"5b0efa8a-153b-4421-abac-2aba4d772a86\",\n \"shop_id\": 1520,\n \"now\": \"2026-05-24T16:35:42\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.m4psp.com/gateway/v1/invoice/check")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n \"shop_order_id\": \"5b0efa8a-153b-4421-abac-2aba4d772a86\",\n \"shop_id\": 1520,\n \"now\": \"2026-05-24T16:35:42\"\n}"
response = http.request(request)
puts response.read_body{
"result": true,
"message": "Ok",
"error_code": 0,
"data": {
"shop_order_id": "5b0efa8a-153b-4421-abac-2aba4d772a86",
"shop_id": 1520,
"status": 2,
"payment_id": 12,
"ps_data": "{\"ps_payer_account\": \"412103XXXXXX7701\", \"bill_id\": \"7766\", \"amount\": \"190.99\", \"status\": \"success\"}",
"ps_currency": 840,
"payway": "<string>",
"description": "Invoice for shop_id=1520",
"created": "2026-05-24T16:35:42",
"updated": "2026-04-21T20:09:02",
"processed": "2026-05-24T16:35:42",
"shop_currency": 840,
"shop_amount": 359.01,
"client_price": 365,
"error_code": 0,
"shop_refund": 104,
"settlement_currency": 840,
"settlement_rate": null,
"expires_at": "2026-01-01T03:00:00+03:00",
"is_unique": true,
"payment_token": {
"token": "980fba62-94d9-4489-bf4c-75b43eecf134",
"status": "SUCCESS",
"expires_at": "2026-04-21T20:07:02",
"account": "412103XXXXXX7701",
"card_info": {
"issuing_country": "GBR",
"issuing_bank": "Example Bank",
"payment_system": "MASTERCARD",
"funding_source": "DEBIT",
"payment_system_product": "PLATINUM"
}
}
}
}Invoice issue (payment creation)
Issued invoice status request
To get the status and up-to-date information regarding issued invoice.
Fields involved in request signature generation:
nowshop_idshop_order_id
POST
/
invoice
/
check
Issued invoice status request
curl --request POST \
--url https://api.m4psp.com/gateway/v1/invoice/check \
--header 'Content-Type: application/json' \
--data '
{
"shop_order_id": "5b0efa8a-153b-4421-abac-2aba4d772a86",
"shop_id": 1520,
"now": "2026-05-24T16:35:42"
}
'import requests
url = "https://api.m4psp.com/gateway/v1/invoice/check"
payload = {
"shop_order_id": "5b0efa8a-153b-4421-abac-2aba4d772a86",
"shop_id": 1520,
"now": "2026-05-24T16:35:42"
}
headers = {"Content-Type": "application/json"}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify({
shop_order_id: '5b0efa8a-153b-4421-abac-2aba4d772a86',
shop_id: 1520,
now: '2026-05-24T16:35:42'
})
};
fetch('https://api.m4psp.com/gateway/v1/invoice/check', 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.m4psp.com/gateway/v1/invoice/check",
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([
'shop_order_id' => '5b0efa8a-153b-4421-abac-2aba4d772a86',
'shop_id' => 1520,
'now' => '2026-05-24T16:35:42'
]),
CURLOPT_HTTPHEADER => [
"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.m4psp.com/gateway/v1/invoice/check"
payload := strings.NewReader("{\n \"shop_order_id\": \"5b0efa8a-153b-4421-abac-2aba4d772a86\",\n \"shop_id\": 1520,\n \"now\": \"2026-05-24T16:35:42\"\n}")
req, _ := http.NewRequest("POST", url, payload)
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.m4psp.com/gateway/v1/invoice/check")
.header("Content-Type", "application/json")
.body("{\n \"shop_order_id\": \"5b0efa8a-153b-4421-abac-2aba4d772a86\",\n \"shop_id\": 1520,\n \"now\": \"2026-05-24T16:35:42\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.m4psp.com/gateway/v1/invoice/check")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n \"shop_order_id\": \"5b0efa8a-153b-4421-abac-2aba4d772a86\",\n \"shop_id\": 1520,\n \"now\": \"2026-05-24T16:35:42\"\n}"
response = http.request(request)
puts response.read_body{
"result": true,
"message": "Ok",
"error_code": 0,
"data": {
"shop_order_id": "5b0efa8a-153b-4421-abac-2aba4d772a86",
"shop_id": 1520,
"status": 2,
"payment_id": 12,
"ps_data": "{\"ps_payer_account\": \"412103XXXXXX7701\", \"bill_id\": \"7766\", \"amount\": \"190.99\", \"status\": \"success\"}",
"ps_currency": 840,
"payway": "<string>",
"description": "Invoice for shop_id=1520",
"created": "2026-05-24T16:35:42",
"updated": "2026-04-21T20:09:02",
"processed": "2026-05-24T16:35:42",
"shop_currency": 840,
"shop_amount": 359.01,
"client_price": 365,
"error_code": 0,
"shop_refund": 104,
"settlement_currency": 840,
"settlement_rate": null,
"expires_at": "2026-01-01T03:00:00+03:00",
"is_unique": true,
"payment_token": {
"token": "980fba62-94d9-4489-bf4c-75b43eecf134",
"status": "SUCCESS",
"expires_at": "2026-04-21T20:07:02",
"account": "412103XXXXXX7701",
"card_info": {
"issuing_country": "GBR",
"issuing_bank": "Example Bank",
"payment_system": "MASTERCARD",
"funding_source": "DEBIT",
"payment_system_product": "PLATINUM"
}
}
}
}Authorizations
Every API request must be signed so that we can identify your account.
The signature is transferred in the request body through the sign parameter, for example:
{
"shop_id": 1520,
"shop_order_id" : "5b0efa8a-153b-4421-abac-2aba4d772a86",
"amout": "6320.91",
"currency": 840,
"payway": "card_invoice_usd",
"description": "Payment for shop_id=1520",
"sign": "77a6f7a30876d480d4e771d08cb83800dd5cb874664c77e515ffc052b20293c6"
}
All further request examples do not include the
"sign" parameter, nevertheless your real requests must include it in the request body where required.
Signature line is generated according to the following algorithm: all request parameters involved in signature generation are ordered in the alphabetical order of keys, the values are concatenated with a colon (":") and the account secret key is added at the end (without the: sign), a sha256 hash is generated from the resulting line and its hex representation is passed in the sign request parameter.
Example of signature generation for a method invoice/create:
- Determining the list of parameters. It looks as follows for the method in consideration:
Fields involved in request signature generation:
shop_idshop_order_idamountcurrencypayway
- Let's sort keys in alphabetical sequence:
"amount", "currency", "payway", "shop_id", "shop_order_id"
- The line for generating the SHA256 hash will be as follows:
"6320.91:840:card_invoice_usd:1520:5b0efa8a-153b-4421-abac-2aba4d772a86account-secret-key"
Where account-secret-key is the secret identification key for your account. You can request a key from the support service.
- Let's get a hash expression of the generated line using Python code:
>>> string_to_sign = '6320.91:840:card_invoice_usd:1520:5b0efa8a-153b-4421-abac-2aba4d772a86account-secret-key' >>> import hashlib >>> sign = hashlib.sha256(string_to_sign.encode()).hexdigest() >>> print(sign) '77a6f7a30876d480d4e771d08cb83800dd5cb874664c77e515ffc052b20293c6'
You can check whether you have generated the signature correctly using the service https://www.xorbin.com/tools/sha256-hash-calculator.
Body
application/json
Order ID in your system. Must be unique for each new invoice.
Maximum string length:
255Example:
"5b0efa8a-153b-4421-abac-2aba4d772a86"
Unique shop identifier in the M4 system.
Example:
1520
Request date and time.
Example:
"2026-05-24T16:35:42"
Response
200 - application/json
OK
- Successful response
- Error response
Boolean value, in case of successful response it will be true, in case of error – false
Example:
true
A textual description of the error, in case of success - simply Ok
Example:
"Ok"
If this value is greater than 0, then the request ended with an error. Description of error codes
Example:
0
Show child attributes
Show child attributes