Compare personal grocery inflation to US CPI with Gemini and Telegram

by Alicia Graham ✓ · 0 views · created 2026-10-06 · Document Extraction, AI Summarization

What this workflow does

This AI workflow has 29 nodes and runs when someone submits an n8n form (“Your Inflation Isn't Their Inflation”) (plus 1 other trigger). Along the way it connects Telegram, Google Gemini Chat Model and Data table. It also calls api.bls.gov over HTTP.

How it runs

Trigger: When someone submits an n8n form (“Your Inflation Isn't Their Inflation”) (plus 1 other trigger).

1. Settings (Edit Fields (Set)): sets 8 fields: official_source, official_series_id, official_label…
2. Create receipt lines table (Data table): create (table)
3. Load saved lines (Data table): get (row)
4. Gather receipts (Code): runs custom JavaScript code
5. What came in? (Switch): routes items into 4 branches
6. Read receipt photo (Basic LLM Chain): sends a prompt to an LLM, with model: Gemini (reads & matches); output parser: Receipt format
7. Find lines to match (Code): runs custom JavaScript code
8. Fetch official index (HTTP Request): calls api.bls.gov (POST)
9. Build report (Code): runs custom JavaScript code
10. Anything new to match? (Switch): routes items into 3 branches

…plus 11 more steps. See the full node list below.

Services it uses

TelegramGoogle Gemini Chat ModelData table

HTTP calls to: api.bls.gov

Before you upgrade to n8n 3.0

Nodes used (15)

• n8n Form Triggern8n-nodes-base.formTrigger
• Telegram Triggern8n-nodes-base.telegramTrigger
• Edit Fields (Set)n8n-nodes-base.set
• Data tablen8n-nodes-base.dataTable
• Coden8n-nodes-base.code
• Switchn8n-nodes-base.switch
• Basic LLM Chain@n8n/n8n-nodes-langchain.chainLlm
• Google Gemini Chat Model@n8n/n8n-nodes-langchain.lmChatGoogleGemini
• Structured Output Parser@n8n/n8n-nodes-langchain.outputParserStructured
• AI Agent@n8n/n8n-nodes-langchain.agent
• Data Table Tooln8n-nodes-base.dataTableTool
• HTTP Requestn8n-nodes-base.httpRequest
• Ifn8n-nodes-base.if
• n8n Formn8n-nodes-base.form
• Telegramn8n-nodes-base.telegram

From the author

Quick overview This workflow accepts grocery receipt photos via an n8n form or Telegram, uses Google Gemini to extract and normalize line items, calculates a personal month-to-month inflation rate, pulls the matching official CPI series from the US BLS API,…

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