curl --request POST \
  --url https://api.{environment}.corti.app/v2/agentic/agents/{agentId}/a2a/tasks/{taskId}:subscribe \
  --header 'Authorization: Bearer <token>' \
  --header 'Tenant-Name: <api-key>'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Tenant-Name': '<api-key>'}
};

fetch('https://api.{environment}.corti.app/v2/agentic/agents/{agentId}/a2a/tasks/{taskId}:subscribe', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

using RestSharp;


var options = new RestClientOptions("https://api.{environment}.corti.app/v2/agentic/agents/{agentId}/a2a/tasks/{taskId}:subscribe");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Tenant-Name", "<api-key>");
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);

import requests

url = "https://api.{environment}.corti.app/v2/agentic/agents/{agentId}/a2a/tasks/{taskId}:subscribe"

headers = {
    "Authorization": "Bearer <token>",
    "Tenant-Name": "<api-key>"
}

response = requests.post(url, headers=headers)

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.{environment}.corti.app/v2/agentic/agents/{agentId}/a2a/tasks/{taskId}:subscribe",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Tenant-Name: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.{environment}.corti.app/v2/agentic/agents/{agentId}/a2a/tasks/{taskId}:subscribe"

	req, _ := http.NewRequest("POST", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Tenant-Name", "<api-key>")

	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.{environment}.corti.app/v2/agentic/agents/{agentId}/a2a/tasks/{taskId}:subscribe")
  .header("Authorization", "Bearer <token>")
  .header("Tenant-Name", "<api-key>")
  .asString();

{
  "id": "task.0192f4c8-4e7c-7d50-b13c-5eaf8a4d9c62",
  "data": "{\"statusUpdate\":{\"taskId\":\"task.0192f4c8-4e7c-7d50-b13c-5eaf8a4d9c62\",\"contextId\":\"ctx.0192f4c8-3d6b-7c4f-a02b-4d9e7f3c8b51\",\"status\":{\"state\":\"TASK_STATE_COMPLETED\",\"timestamp\":\"2026-05-19T12:00:01Z\"}}}"
}

{
  "error": {
    "code": 404,
    "status": "NOT_FOUND",
    "message": "Task not found.",
    "details": [
      {
        "@type": "type.googleapis.com/google.rpc.ErrorInfo",
        "reason": "TASK_NOT_FOUND",
        "domain": "a2a-protocol.org",
        "metadata": {
          "taskId": "task.0192f4c8-4e7c-7d50-b13c-5eaf8a4d9c62"
        }
      }
    ]
  }
}

{
  "error": {
    "code": 404,
    "status": "NOT_FOUND",
    "message": "Task not found.",
    "details": [
      {
        "@type": "type.googleapis.com/google.rpc.ErrorInfo",
        "reason": "TASK_NOT_FOUND",
        "domain": "a2a-protocol.org",
        "metadata": {
          "taskId": "task.0192f4c8-4e7c-7d50-b13c-5eaf8a4d9c62"
        }
      }
    ]
  }
}