Post FX rate change commentary to Slack with Frankfurter and Claude

by 鈴木光輝（Koki Suzuki）：JP ✓ · 6 views · created 2026-08-17 · Crypto Trading, AI Summarization

What this workflow does

This workflow has 17 nodes and runs on a schedule (every 6 hours). It uses only n8n's built-in nodes. It also calls api.frankfurter.dev and api.anthropic.com over HTTP.

How it runs

Trigger: On a schedule (every 6 hours).

1. Set: config (Edit Fields (Set)): sets 4 fields: baseCurrency, targetCurrency, thresholdPercent…
2. Fetch exchange rate (HTTP Request): calls api.frankfurter.dev
3. Rate fetched OK? (If): checks a condition and branches into true / false
4. Check for significant move (Code): runs custom JavaScript code
5. Error: rate fetch failed (Code): runs custom JavaScript code
6. Move significant? (If): checks a condition and branches into true / false
7. Build Claude prompt (Code): runs custom JavaScript code
8. Call Claude (Anthropic) API (HTTP Request): calls api.anthropic.com (POST)
9. Claude call succeeded? (If): checks a condition and branches into true / false
10. Build Slack message (Code): runs custom JavaScript code

…plus 4 more steps. See the full node list below.

HTTP calls to: api.frankfurter.dev, api.anthropic.com

Before you upgrade to n8n 3.0

Nodes used (6)

• Schedule Triggern8n-nodes-base.scheduleTrigger
• Edit Fields (Set)n8n-nodes-base.set
• HTTP Requestn8n-nodes-base.httpRequest
• Ifn8n-nodes-base.if
• Coden8n-nodes-base.code
• No Operation, do nothingn8n-nodes-base.noOp

From the author

Quick overview On a schedule, this workflow checks an exchange rate via the free Frankfurter API, compares it to the last checked rate, and — if it moved beyond a threshold you set — asks Claude to write a short factual note and posts it to Slack. How it…

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