To handle errors that occur during request execution, it is necessary to analyze the HTTP status of the response or the presence of a specific JSON structure in the response:
{
"error": "ERROR_HANDLER_ALREADY_EXIST",
"error_description": "Handler already exists!"
}{% include notitle error handling %}
A list of specific error codes that occur when calling a particular REST API method is described for each method separately. There is also a list of system errors that are independent of the logic of a specific REST API request.
{% note tip "" %}
If you are developing integrations for Bitrix24 using AI tools (Codex, Claude Code, Cursor), connect the MCP server so that the assistant can utilize the official REST documentation.
{% endnote %}
{% include notitle system errors %}