# Changelog

> Every change to the API, newest first, with the kind of change.

Last updated: 2026-10-30. Source: https://docs.smartchat.marketing/en/changelog/

Kinds of change: `added`, `changed`, `deprecated`, `removed`, `fixed`, `security`. The rules are explained in [Versioning and deprecation](https://docs.smartchat.marketing/en/concepts/versioning/).

## 2026-10-25

- **added**: Initial release of the rebuilt SmartChat API and MCP server. All field names, enum values, error codes and tool names are English.
- **added**: One error format for every error (RFC 9457, application/problem+json) with the fields type, title, status, error_type, code, message, param, retryable, doc_url and request_id.
- **added**: Cursor pagination on every list, the Idempotency-Key header for calls that send messages, and a protection limit of 120 requests per minute per key.

- **removed**: The earlier API is replaced. Earlier field names, error codes, API keys and assistant connections are not valid any more. Create new keys and connect assistants again.