# Penny Engine workflow quickstart
Validate supplied JSON assertions after an agent job. This does not verify factual truth.

Download /integrations/workflow-client.py and /integrations/agent-output.json.
Free input check: python3 workflow-client.py agent-output.json
For authorized input, set APIFY_TOKEN privately; authorize one paid run:
python3 workflow-client.py agent-output.json --paid-apify
The request caps Apify charges at $0.05. Check current terms. No automatic retries; a timeout may follow a billable run. Check run history before retrying.
Exit codes: 0 success, 2 error, 3 completed with QA issues. Paid client branch not end-to-end verified.

Apify: https://apify.com/pennyengine/penny-engine-structured-work
n8n / Make guide: /integrations/apify-n8n
Manifest: /integrations/apify-n8n.json
Free MCP: /mcp
Discovery and preflight are not sales.