Reference · 03

Changelog.

Changes to the Olbrain API and SDKs that you may need to act on, newest first.

2026-11-04

Alchemist error codes. Every failed Alchemist tool call returns {"error": {code, message, retryable, reference}}. Branch on code instead of the message's words. Errors →

Python SDK 0.5.0. Adds the Olbrain client: workflow runs, approvals, and research agents. Also ships the 0.4.0 fix below. Python SDK →
Signed webhooks. Jobs can be started by Stripe, Shopify, or your own service without an Access Key. Signed webhooks →
Daily run limit. A job's daily run limit now applies to every start, returning 429 daily_run_limit.
Breaking: project_id removed from trigger and session responses. Use organization_id and agent_id.

JavaScript SDK 1.4.0 and Python SDK 0.4.0. AgentClient now calls https://webhook.olbrain.com; earlier versions called a host that no longer exists. listen polls, session reads throw instead of hiding failures, and updateSession/deleteSession always throw. Upgrade. Python 0.4.0 reached PyPI as part of 0.5.0.

JavaScript SDK 1.3.2 and Python SDK 0.3.2. Both packages ship an offline AGENTS.md API reference for coding assistants.

JavaScript SDK 1.3.0. olbrain.research for research agents, for signed-in users. Research agents →