curl --request POST \
  --url https://accounts.livechat.com/v2/organizations/my/saml \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "entrypoint": "https://accounts.example.com/saml2/idp/SSOService.php",
  "certificate": "-----BEGIN CERTIFICATE-----\nMIIDXTCCAkWgAwIBAgIJALmVVuDWu4NYMA0GCSqGSIb3DQEBCwUAMEUxCzAJBgNV\n-----END CERTIFICATE-----",
  "idp_entity_id": "https://accounts.example.com/saml2/idp/metadata.php",
  "sp_entity_id": "https://accounts.livechat.com/saml/metadata"
}
'

import requests

url = "https://accounts.livechat.com/v2/organizations/my/saml"

payload = {
    "entrypoint": "https://accounts.example.com/saml2/idp/SSOService.php",
    "certificate": "-----BEGIN CERTIFICATE-----
MIIDXTCCAkWgAwIBAgIJALmVVuDWu4NYMA0GCSqGSIb3DQEBCwUAMEUxCzAJBgNV
-----END CERTIFICATE-----",
    "idp_entity_id": "https://accounts.example.com/saml2/idp/metadata.php",
    "sp_entity_id": "https://accounts.livechat.com/saml/metadata"
}
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({
    entrypoint: 'https://accounts.example.com/saml2/idp/SSOService.php',
    certificate: '-----BEGIN CERTIFICATE-----\nMIIDXTCCAkWgAwIBAgIJALmVVuDWu4NYMA0GCSqGSIb3DQEBCwUAMEUxCzAJBgNV\n-----END CERTIFICATE-----',
    idp_entity_id: 'https://accounts.example.com/saml2/idp/metadata.php',
    sp_entity_id: 'https://accounts.livechat.com/saml/metadata'
  })
};

fetch('https://accounts.livechat.com/v2/organizations/my/saml', 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://accounts.livechat.com/v2/organizations/my/saml",
  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([
    'entrypoint' => 'https://accounts.example.com/saml2/idp/SSOService.php',
    'certificate' => '-----BEGIN CERTIFICATE-----
MIIDXTCCAkWgAwIBAgIJALmVVuDWu4NYMA0GCSqGSIb3DQEBCwUAMEUxCzAJBgNV
-----END CERTIFICATE-----',
    'idp_entity_id' => 'https://accounts.example.com/saml2/idp/metadata.php',
    'sp_entity_id' => 'https://accounts.livechat.com/saml/metadata'
  ]),
  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://accounts.livechat.com/v2/organizations/my/saml"

	payload := strings.NewReader("{\n  \"entrypoint\": \"https://accounts.example.com/saml2/idp/SSOService.php\",\n  \"certificate\": \"-----BEGIN CERTIFICATE-----\\nMIIDXTCCAkWgAwIBAgIJALmVVuDWu4NYMA0GCSqGSIb3DQEBCwUAMEUxCzAJBgNV\\n-----END CERTIFICATE-----\",\n  \"idp_entity_id\": \"https://accounts.example.com/saml2/idp/metadata.php\",\n  \"sp_entity_id\": \"https://accounts.livechat.com/saml/metadata\"\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://accounts.livechat.com/v2/organizations/my/saml")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"entrypoint\": \"https://accounts.example.com/saml2/idp/SSOService.php\",\n  \"certificate\": \"-----BEGIN CERTIFICATE-----\\nMIIDXTCCAkWgAwIBAgIJALmVVuDWu4NYMA0GCSqGSIb3DQEBCwUAMEUxCzAJBgNV\\n-----END CERTIFICATE-----\",\n  \"idp_entity_id\": \"https://accounts.example.com/saml2/idp/metadata.php\",\n  \"sp_entity_id\": \"https://accounts.livechat.com/saml/metadata\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://accounts.livechat.com/v2/organizations/my/saml")

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  \"entrypoint\": \"https://accounts.example.com/saml2/idp/SSOService.php\",\n  \"certificate\": \"-----BEGIN CERTIFICATE-----\\nMIIDXTCCAkWgAwIBAgIJALmVVuDWu4NYMA0GCSqGSIb3DQEBCwUAMEUxCzAJBgNV\\n-----END CERTIFICATE-----\",\n  \"idp_entity_id\": \"https://accounts.example.com/saml2/idp/metadata.php\",\n  \"sp_entity_id\": \"https://accounts.livechat.com/saml/metadata\"\n}"

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

{
  "error": "bad_request",
  "error_description": "The server cannot or will not process the request due to an apparent client error (for example, malformed request syntax, size too large).",
  "request_id": "5903c51b-89f0-41a9-a25d-4f39af100353"
}

{
  "error": "conflict",
  "error_description": "The request couldn't be processed because of conflict in the current state of the resource.",
  "resource_name": "account",
  "resource_id": "5903c51b-89f0-41a9-a25d-4f39af100353",
  "request_id": "5903c51b-89f0-41a9-a25d-4f39af100353"
}

{
  "error": "invalid_request",
  "error_description": "The request is missing a required parameter, includes an invalid parameter value, includes a parameter more than once, or is otherwise malformed.",
  "invalid_fields": {
    "email": "invalid email address"
  },
  "request_id": "5903c51b-89f0-41a9-a25d-4f39af100353"
}

{
  "error": "server_error",
  "error_description": "The server encountered an unexpected condition that prevented it from fulfilling the request.",
  "request_id": "5903c51b-89f0-41a9-a25d-4f39af100353"
}