Cancellation of funds holding

curl --request POST \
  --url https://api.m4psp.com/gateway/v1/invoice/unhold \
  --header 'Content-Type: application/json' \
  --data '
{
  "shop_id": 1520,
  "now": "2026-05-24T16:35:42",
  "invoice_id": 108744
}
'

import requests

url = "https://api.m4psp.com/gateway/v1/invoice/unhold"

payload = {
    "shop_id": 1520,
    "now": "2026-05-24T16:35:42",
    "invoice_id": 108744
}
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_id: 1520, now: '2026-05-24T16:35:42', invoice_id: 108744})
};

fetch('https://api.m4psp.com/gateway/v1/invoice/unhold', 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/unhold",
  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_id' => 1520,
    'now' => '2026-05-24T16:35:42',
    'invoice_id' => 108744
  ]),
  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/unhold"

	payload := strings.NewReader("{\n  \"shop_id\": 1520,\n  \"now\": \"2026-05-24T16:35:42\",\n  \"invoice_id\": 108744\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/unhold")
  .header("Content-Type", "application/json")
  .body("{\n  \"shop_id\": 1520,\n  \"now\": \"2026-05-24T16:35:42\",\n  \"invoice_id\": 108744\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.m4psp.com/gateway/v1/invoice/unhold")

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_id\": 1520,\n  \"now\": \"2026-05-24T16:35:42\",\n  \"invoice_id\": 108744\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": "2026-04-21T20:09:03",
    "shop_currency": 840,
    "shop_amount": 359.01,
    "client_price": 365,
    "error_code": 0,
    "shop_refund": 104,
    "settlement_currency": 840,
    "settlement_rate": null
  }
}

POST

invoice

unhold

Cancellation of funds holding

curl --request POST \
  --url https://api.m4psp.com/gateway/v1/invoice/unhold \
  --header 'Content-Type: application/json' \
  --data '
{
  "shop_id": 1520,
  "now": "2026-05-24T16:35:42",
  "invoice_id": 108744
}
'

import requests

url = "https://api.m4psp.com/gateway/v1/invoice/unhold"

payload = {
    "shop_id": 1520,
    "now": "2026-05-24T16:35:42",
    "invoice_id": 108744
}
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_id: 1520, now: '2026-05-24T16:35:42', invoice_id: 108744})
};

fetch('https://api.m4psp.com/gateway/v1/invoice/unhold', 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/unhold",
  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_id' => 1520,
    'now' => '2026-05-24T16:35:42',
    'invoice_id' => 108744
  ]),
  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/unhold"

	payload := strings.NewReader("{\n  \"shop_id\": 1520,\n  \"now\": \"2026-05-24T16:35:42\",\n  \"invoice_id\": 108744\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/unhold")
  .header("Content-Type", "application/json")
  .body("{\n  \"shop_id\": 1520,\n  \"now\": \"2026-05-24T16:35:42\",\n  \"invoice_id\": 108744\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.m4psp.com/gateway/v1/invoice/unhold")

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_id\": 1520,\n  \"now\": \"2026-05-24T16:35:42\",\n  \"invoice_id\": 108744\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": "2026-04-21T20:09:03",
    "shop_currency": 840,
    "shop_amount": 359.01,
    "client_price": 365,
    "error_code": 0,
    "shop_refund": 104,
    "settlement_currency": 840,
    "settlement_rate": null
  }
}

Authorizations

sign

string

requestBody

required

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_id
shop_order_id
amount
currency
payway

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

shop_id

integer

required

Unique shop identifier in the M4 system.

Example:

1520

now

string<date-time>

required

Request date and time.

Example:

"2026-05-24T16:35:42"

invoice_id

number<integer>

required

Invoice ID in the M4 system.

Example:

108744

Response

200 - application/json

Funds have been unhold successfully
Error response

result

boolean

required

Boolean value, in case of successful response it will be true, in case of error – false

Example:

true

message

string

required

A textual description of the error, in case of success - simply Ok

Example:

"Ok"

error_code

number

required

If this value is greater than 0, then the request ended with an error. Description of error codes

Example:

0

data

Cancellation of holding · object

required

Show child attributes

Confirmation of funds withdrawal (charge)Getting payment methods for input

Overview

Payments

Withdraws

Callbacks

Directories and other methods

Cancellation of funds holding