crewai-zambo

Verifiable AER-1 execution receipts for CrewAI agents. Publish CrewAI task events as public, verifiable receipts at zambo.dev.

Receipts follow AER-1, the verifiable execution receipt standard created by Brennan Zambo.

Install

pip install crewai-zambo

Ten-line example

from crewai_zambo import ZamboCrewListener

listener = ZamboCrewListener()
result = listener.on_task_completed("Summarize this task", "completed")
print(listener.last_receipt_url or result)

Attach ZamboCrewListener to the CrewAI listener mechanism supported by your installed CrewAI version, or call on_task_completed from a task completion hook. The listener prints each public https://zambo.dev/run/{id} URL and keeps the most recent URL in last_receipt_url.

The receipt describes what the live endpoint recorded and observed. It does not prove an outside outcome that the endpoint did not observe. Set ZAMBO_API_URL when using a compatible Zambo host. Listener failures are available in receipt_errors.

Project homepage: https://zambo.dev AER-1 receipt spec: https://zambo.dev/aer-1/