For AI agents: markdown of this page — /docs-content-en/bots/messages/read.md documentation index — /llms.txt

Read messages

POST /v1/bots/:botId/chats/:dialogId/read

Marks messages as read on behalf of the bot. Without messageId, marks all messages in the chat as read.

Parameters

Parameter Type Required Default Description
botId (path) number yes — Bot ID
dialogId (path) string yes — Dialog ID: numeric user ID for direct messages, chatXXX for group chats
messageId (body) number no — Read all messages up to and including this one. Without the parameter — read all

Examples

curl — personal key

Terminal 
curl -X POST https://vibecode.bitrix24.com/v1/bots/42/chats/chat456/read \
  -H "X-Api-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "messageId": 1501 }'

curl — OAuth application

Terminal 
curl -X POST https://vibecode.bitrix24.com/v1/bots/42/chats/chat456/read \
  -H "X-Api-Key: YOUR_APP_KEY" \
  -H "Authorization: Bearer USER_SESSION_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{ "messageId": 1501 }'

JavaScript — personal key

javascript 
const res = await fetch('https://vibecode.bitrix24.com/v1/bots/42/chats/chat456/read', {
  method: 'POST',
  headers: {
    'X-Api-Key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({ messageId: 1501 }),
})

const { success, data } = await res.json()
console.log('Read up to:', data.lastId)

JavaScript — OAuth application

javascript 
const res = await fetch('https://vibecode.bitrix24.com/v1/bots/42/chats/chat456/read', {
  method: 'POST',
  headers: {
    'X-Api-Key': 'YOUR_APP_KEY',
    'Authorization': 'Bearer USER_SESSION_TOKEN',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({ messageId: 1501 }),
})

const { success, data } = await res.json()

Response fields

Field Type Description
chatId number Chat ID
lastId number ID of the last read message
counter number Remaining number of unread messages
viewedMessages number[] IDs of the read messages

Response example

JSON 
{
  "success": true,
  "data": {
    "chatId": 456,
    "lastId": 1501,
    "counter": 0,
    "viewedMessages": [1499, 1500, 1501]
  }
}

Error response example

404 — bot not found:

JSON 
{
  "success": false,
  "error": {
    "code": "BOT_NOT_FOUND",
    "message": "Bot 999 not found. Register it first via POST /v1/bots."
  }
}

Errors

HTTP Code Description
400 INVALID_BOT_ID botId is not a number
404 BOT_NOT_FOUND No bot found with this ID
403 BOT_ACCESS_DENIED The bot belongs to a different API key
502 BITRIX_ERROR Bitrix24 error (error text in message)
403 SCOPE_DENIED The API key does not have the imbot scope
401 TOKEN_MISSING The API key has no configured tokens

Full list of common API errors — Errors.

Known specifics

Without messageId: if messageId is not passed, all messages in the chat are marked as read.

Reading up to a message: when messageId is specified, all messages up to and including the specified one are read, not just that single message.

See also