curl --request POST \
  --url https://api.wsapi.chat/messages/{messageId}/read \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --header 'X-Instance-Id: <x-instance-id>' \
  --data '
{
  "chatId": "1234567890@s.whatsapp.net",
  "senderId": "1234567890@s.whatsapp.net",
  "receiptType": "read"
}
'

import requests

url = "https://api.wsapi.chat/messages/{messageId}/read"

payload = {
    "chatId": "1234567890@s.whatsapp.net",
    "senderId": "1234567890@s.whatsapp.net",
    "receiptType": "read"
}
headers = {
    "X-Instance-Id": "<x-instance-id>",
    "X-Api-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'X-Instance-Id': '<x-instance-id>',
    'X-Api-Key': '<api-key>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    chatId: '1234567890@s.whatsapp.net',
    senderId: '1234567890@s.whatsapp.net',
    receiptType: 'read'
  })
};

fetch('https://api.wsapi.chat/messages/{messageId}/read', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

using RestSharp;


var options = new RestClientOptions("https://api.wsapi.chat/messages/{messageId}/read");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("X-Instance-Id", "<x-instance-id>");
request.AddHeader("X-Api-Key", "<api-key>");
request.AddJsonBody("{\n  \"chatId\": \"1234567890@s.whatsapp.net\",\n  \"senderId\": \"1234567890@s.whatsapp.net\",\n  \"receiptType\": \"read\"\n}", false);
var response = await client.PostAsync(request);

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

{
  "status": 400,
  "detail": "invalid request body"
}

{
  "status": 401,
  "detail": "unauthorized"
}

{
  "status": 403,
  "detail": "device not paired"
}

{
  "status": 503,
  "detail": "instance not available"
}