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

Add a block to a message

POST /v1/chats/messages/:messageId/blocks

Adds a block to the end of a constructor message — a message assembled from blocks.

Parameters

Parameter Type Required Default Description
messageId (path) number yes — ID of the constructor message, a positive integer — data.id of the v2 send response or the id of a message with a non-null block in Messages around a message

Request fields (body)

Field Type Required Description
element object yes A block in the Bitrix24 constructor format: type and the fields of that type, for example { "type": "text", "text": "Build passed" }

Other body fields and query parameters are rejected with 400 INVALID_PARAMS.

Examples

curl — personal key

Terminal 
curl -X POST "https://vibecode.bitrix24.com/v1/chats/messages/1001/blocks" \
  -H "X-Api-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "element": { "type": "text", "text": "Build passed" } }'

curl — OAuth application

Terminal 
curl -X POST "https://vibecode.bitrix24.com/v1/chats/messages/1001/blocks" \
  -H "X-Api-Key: YOUR_APP_KEY" \
  -H "Authorization: Bearer USER_SESSION_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{ "element": { "type": "text", "text": "Build passed" } }'

JavaScript — personal key

javascript 
const res = await fetch('https://vibecode.bitrix24.com/v1/chats/messages/1001/blocks', {
  method: 'POST',
  headers: {
    'X-Api-Key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({ element: { type: 'text', text: 'Build passed' } }),
})

const { data } = await res.json()
console.log('Block added:', data.result)

JavaScript — OAuth application

javascript 
const res = await fetch('https://vibecode.bitrix24.com/v1/chats/messages/1001/blocks', {
  method: 'POST',
  headers: {
    'X-Api-Key': 'YOUR_APP_KEY',
    'Authorization': 'Bearer USER_SESSION_TOKEN',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({ element: { type: 'text', text: 'Build passed' } }),
})

const { data } = await res.json()
console.log('Block added:', data.result)

Response fields

Field Type Description
success boolean Always true on success
data.result boolean true — the block was added

Response example

JSON 
{
  "success": true,
  "data": { "result": true }
}

Error response example

422 — the message has no blocks:

JSON 
{
  "success": false,
  "error": {
    "code": "BITRIX_ERROR",
    "message": "BLOCK_NOT_FOUND",
    "b24Code": "BLOCK_NOT_FOUND"
  }
}

Errors

HTTP Code Description
400 INVALID_PARAMS messageId is not a positive integer, the body is not a JSON object, element is missing or not an object, or an extra body field or query parameter is passed. Checked before any call to Bitrix24
404 ENTITY_NOT_FOUND Bitrix24 returned a generic "not found" code or an error with the text "not found". The portal code is in error.b24Code
422 BITRIX_ERROR Bitrix24 returned an error, the portal code is in error.b24Code. MESSAGE_NOT_FOUND — there is no message with this ID, BLOCK_NOT_FOUND — the message has no blocks, WRONG_ELEMENT_TYPE and EMPTY_TEXT_FIELD — the block is malformed, BLOCK_LENGTH_EXCEEDED — the message blocks exceed the length limit, MESSAGE_ACCESS_DENIED — you have no permission to edit the message, for example it belongs to someone else
403 SCOPE_DENIED The API key does not have the im scope
403 WRITE_BLOCKED_READONLY_KEY The key is read-only — see access rights
401 TOKEN_MISSING The API key has no Bitrix24 tokens configured

The full list of common API errors — Errors.

Known specifics

Only constructor messages have blocks. A message becomes a constructor message when it is sent with the block field in v2 send mode or when blocks are set on it by editing the message in v2 mode. A plain message has no blocks.

The response does not include the new block's ID. Block IDs come in the block.elements[].id field of the message, for example in the response of Messages around a message.

See also