Log AI agent runs in hash-chained receipts with OpenAI and Data Tables

by Alexander Englund ✓ · 0 views · created 2026-10-09 · Engineering, AI Chatbot

What this workflow does

This AI workflow has 39 nodes and runs when an HTTP POST request hits its webhook URL (plus 2 other triggers). Along the way it connects OpenAI Chat Model.

How it runs

Trigger: When an HTTP POST request hits its webhook URL (plus 2 other triggers).

1. Settings (Edit Fields (Set)): sets 12 fields: model, system_message, max_output_tokens…
2. Daily check settings (Edit Fields (Set)): sets 4 fields: owner_email, sender_email, email_when_intact…
3. Load the client's chain (Data table): get
4. Validate request (Code): runs custom JavaScript code
5. Load the whole log (Data table): get
6. Load the client's anchors (Data table): get
7. Route the request (Switch): routes items into 3 branches
8. Load saved anchors (Data table): get
9. Verify the chain (Code): runs custom JavaScript code
10. Client AI agent (AI Agent): runs an AI agent, with model: Chat model; 1 tool (Calculator)

…plus 24 more steps. See the full node list below.

Services it uses

OpenAI Chat Model

Before you upgrade to n8n 3.0

Nodes used (13)

• Webhookn8n-nodes-base.webhook
• Edit Fields (Set)n8n-nodes-base.set
• Coden8n-nodes-base.code
• Switchn8n-nodes-base.switch
• Respond to Webhookn8n-nodes-base.respondToWebhook
• AI Agent@n8n/n8n-nodes-langchain.agent
• OpenAI Chat Model@n8n/n8n-nodes-langchain.lmChatOpenAi
• Calculator@n8n/n8n-nodes-langchain.toolCalculator
• Data tablen8n-nodes-base.dataTable
• Ifn8n-nodes-base.if
• Waitn8n-nodes-base.wait
• Send Emailn8n-nodes-base.emailSend
• Schedule Triggern8n-nodes-base.scheduleTrigger

From the author

Quick overview This workflow exposes webhook endpoints to run an OpenAI-powered agent per client, log each run into an n8n Data Table as a SHA-256 hash chain, and email daily integrity reports and anchors, with an additional verification endpoint clients can…

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