Update

curl --request PUT \
  --url https://api.incident.io/v1/alert_notes/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "content": "Customer reports **checkout 500s** starting ~14:32 UTC. Investigating `payments-api`.\n\n- Error rate: ~12% on `/checkout`\n- Region: `eu-west-1`\n- See [dashboard](https://grafana.example.com/d/abc)\n"
}
'

import requests

url = "https://api.incident.io/v1/alert_notes/{id}"

payload = { "content": "Customer reports **checkout 500s** starting ~14:32 UTC. Investigating `payments-api`.

- Error rate: ~12% on `/checkout`
- Region: `eu-west-1`
- See [dashboard](https://grafana.example.com/d/abc)
" }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    content: 'Customer reports **checkout 500s** starting ~14:32 UTC. Investigating `payments-api`.\n\n- Error rate: ~12% on `/checkout`\n- Region: `eu-west-1`\n- See [dashboard](https://grafana.example.com/d/abc)\n'
  })
};

fetch('https://api.incident.io/v1/alert_notes/{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.incident.io/v1/alert_notes/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'content' => 'Customer reports **checkout 500s** starting ~14:32 UTC. Investigating `payments-api`.

- Error rate: ~12% on `/checkout`
- Region: `eu-west-1`
- See [dashboard](https://grafana.example.com/d/abc)
'
  ]),
  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.incident.io/v1/alert_notes/{id}"

	payload := strings.NewReader("{\n  \"content\": \"Customer reports **checkout 500s** starting ~14:32 UTC. Investigating `payments-api`.\\n\\n- Error rate: ~12% on `/checkout`\\n- Region: `eu-west-1`\\n- See [dashboard](https://grafana.example.com/d/abc)\\n\"\n}")

	req, _ := http.NewRequest("PUT", 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.put("https://api.incident.io/v1/alert_notes/{id}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"content\": \"Customer reports **checkout 500s** starting ~14:32 UTC. Investigating `payments-api`.\\n\\n- Error rate: ~12% on `/checkout`\\n- Region: `eu-west-1`\\n- See [dashboard](https://grafana.example.com/d/abc)\\n\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.incident.io/v1/alert_notes/{id}")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"content\": \"Customer reports **checkout 500s** starting ~14:32 UTC. Investigating `payments-api`.\\n\\n- Error rate: ~12% on `/checkout`\\n- Region: `eu-west-1`\\n- See [dashboard](https://grafana.example.com/d/abc)\\n\"\n}"

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

{
  "alert_note": {
    "alert_group_id": "01HB9Z8WANK6P870EA6S7TK1DS",
    "alert_id": "01FCNDV6P870EA6S7TK1DSYDG0",
    "content": "Customer reports **checkout 500s** starting ~14:32 UTC. Investigating `payments-api`.\n\n- Error rate: ~12% on `/checkout`\n- Region: `eu-west-1`\n- See [dashboard](https://grafana.example.com/d/abc)\n",
    "created_at": "2026-05-28T15:30:00Z",
    "creator": {
      "api_key": {
        "id": "01FCNDV6P870EA6S7TK1DSYDG0",
        "name": "My test API key"
      },
      "user": {
        "email": "lisa@incident.io",
        "id": "01FCNDV6P870EA6S7TK1DSYDG0",
        "name": "Lisa Karlin Curtis",
        "role": "viewer",
        "slack_user_id": "U02AYNF2XJM"
      }
    },
    "id": "01J1X9J85C7Y12G8P8W8K55Q5Y",
    "images": [
      {
        "id": "01G0J1EXE7AXZ2C93K61WBPYEH",
        "url": "https://storage.googleapis.com/incident-io/images/..."
      }
    ],
    "last_edited_at": "2026-05-28T15:35:00Z",
    "updated_at": "2026-05-28T15:35:00Z"
  }
}