Build a cost estimation chatbot with Mistral AI, OCR & Supabase
Needs changesNeeds changes. This template uses 1 thing(s) that n8n 3.0 removes: AI Agent v1 (old agent modes). 1 breaking item(s) found. Static check, last run 2026-10-19.
What this workflow does
This AI workflow has 16 nodes and runs when a chat message arrives. Along the way it connects Mistral Cloud Chat Model, Gmail and Supabase. It also calls api.mistral.ai over HTTP.
How it runs
Trigger: When a chat message arrives.
- CHECK IF BINARY FILE IS PRESENT OR NOT (If): checks a condition and branches into true / false
- Split Out: splits a list into separate items
- Merge: merges the data from its input branches
- NORMALIZE binary file (Code): runs custom JavaScript code
- AI Agent: runs an AI agent, with model: Mistral Cloud Chat Model; 3 tools (Calculator, Supabase Get, Send a message in Gmail); memory: Simple Memory
- Mistral Upload (HTTP Request): calls api.mistral.ai (POST)
- Mistral Signed URL (HTTP Request): calls an HTTP API
- Mistral DOC OCR (HTTP Request): calls api.mistral.ai (POST)
- STORE OCR OUTPUT (Supabase): uses Supabase
- OCR (ANY OCR API ) (HTTP Request): calls an HTTP API (POST)
Services it uses
HTTP calls to: api.mistral.ai
Before you upgrade to n8n 3.0
1 thing in this workflow is removed in n8n 3.0. Fix it before you upgrade:
- AI Agent v1 (old agent modes) in ai agent cost estimate (v1.7): replace with Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent.
Rather not rewrite it? Many of these flows can be rebuilt in Make (free plan).
| Removed in 3.0 | Replace with |
|---|---|
| AI Agent v1 (old agent modes) ai agent cost estimate (v1.7) | Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent. |
Nodes used (13)
- Mistral Cloud Chat Model
@n8n/n8n-nodes-langchain.lmChatMistralCloud - Simple Memory
@n8n/n8n-nodes-langchain.memoryBufferWindow - Calculator
@n8n/n8n-nodes-langchain.toolCalculator - Chat Trigger
@n8n/n8n-nodes-langchain.chatTrigger - Gmail Tool
n8n-nodes-base.gmailTool - AI Agent
@n8n/n8n-nodes-langchain.agent - Split Out
n8n-nodes-base.splitOut - Merge
n8n-nodes-base.merge - If
n8n-nodes-base.if - Code
n8n-nodes-base.code - HTTP Request
n8n-nodes-base.httpRequest - Supabase
n8n-nodes-base.supabase - Supabase Tool
n8n-nodes-base.supabaseTool
From the author
AI Cost Estimation Chatbot (Conversational Dual-Agent + OCR Workflow) Overview This workflow introduces a conversational AI Cost Estimation Chatbot with built-in OCR document analysis and interactive form guidance. It helps users and teams handle pricing,…