curl --request PATCH \
  --url https://api.retellai.com/v2/update-live-call/{call_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "fields_to_override": {
    "override_dynamic_variables": {
      "additional_discount": "15%"
    }
  },
  "call_control": {
    "additional_context": "Customer just opened a support ticket about billing.",
    "trigger_response": true
  }
}
'

import requests

url = "https://api.retellai.com/v2/update-live-call/{call_id}"

payload = {
    "fields_to_override": { "override_dynamic_variables": { "additional_discount": "15%" } },
    "call_control": {
        "additional_context": "Customer just opened a support ticket about billing.",
        "trigger_response": True
    }
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.patch(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    fields_to_override: {override_dynamic_variables: {additional_discount: '15%'}},
    call_control: {
      additional_context: 'Customer just opened a support ticket about billing.',
      trigger_response: true
    }
  })
};

fetch('https://api.retellai.com/v2/update-live-call/{call_id}', 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.retellai.com/v2/update-live-call/{call_id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'fields_to_override' => [
        'override_dynamic_variables' => [
                'additional_discount' => '15%'
        ]
    ],
    'call_control' => [
        'additional_context' => 'Customer just opened a support ticket about billing.',
        'trigger_response' => true
    ]
  ]),
  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.retellai.com/v2/update-live-call/{call_id}"

	payload := strings.NewReader("{\n  \"fields_to_override\": {\n    \"override_dynamic_variables\": {\n      \"additional_discount\": \"15%\"\n    }\n  },\n  \"call_control\": {\n    \"additional_context\": \"Customer just opened a support ticket about billing.\",\n    \"trigger_response\": true\n  }\n}")

	req, _ := http.NewRequest("PATCH", 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.patch("https://api.retellai.com/v2/update-live-call/{call_id}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"fields_to_override\": {\n    \"override_dynamic_variables\": {\n      \"additional_discount\": \"15%\"\n    }\n  },\n  \"call_control\": {\n    \"additional_context\": \"Customer just opened a support ticket about billing.\",\n    \"trigger_response\": true\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.retellai.com/v2/update-live-call/{call_id}")

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

request = Net::HTTP::Patch.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"fields_to_override\": {\n    \"override_dynamic_variables\": {\n      \"additional_discount\": \"15%\"\n    }\n  },\n  \"call_control\": {\n    \"additional_context\": \"Customer just opened a support ticket about billing.\",\n    \"trigger_response\": true\n  }\n}"

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

{
  "success": true
}

{
  "status": "error",
  "message": "Invalid request format, please check API reference."
}

{
  "status": "error",
  "message": "API key is missing or invalid."
}

{
  "status": "error",
  "message": "The requested resource was not found."
}

{
  "status": "error",
  "message": "Cannot find requested asset under given api key."
}

{
  "status": "error",
  "message": "An unexpected server error occurred."
}