Slack Procurement Negotiation Coach with n8n Webhook, Groq & Sheets

Turn Slack negotiations into data-driven procurement strategy—automatically

This n8n workflow connects Slack procurement requests to live supplier responses and generates an intelligence report (plus tailored counteroffer scenarios) using Alpha Vantage aluminum prices, Google Sheets deal history, and Groq LLM prompts—then logs the session back to Google Sheets.

What this workflow does

• Receives Slack input: listens for Slack slash commands, button clicks, or modal submissions via an n8n webhook endpoint (POST request).
• Builds supplier context: on slash command, fetches the latest aluminum market price from Alpha Vantage and retrieves the supplier’s negotiation records from Google Sheets using the provided Supplier_ID.
• Generates a structured supplier profile: combines market price + deal history and sends them to Groq to extract pricing flexibility, concession tendencies, resistance triggers, and a recommended negotiation tactic.
• Creates pushback counter-strategies: runs Groq again to generate three structured scenarios (cooperative, moderate, aggressive) along with a specific buyer counter-tactic for each.
• Outputs directly in Slack: posts a Slack Block Kit message with the supplier summary, the three scenarios, and a “Generate Live Counteroffer” button.
• Captures live supplier replies: when the button is clicked, opens a Slack modal to capture what the supplier just said, preserving prior strategy context in the modal metadata.
• Produces the live response: upon modal submission, sends the supplier’s live message to Groq and logs the session back to Google Sheets.

Use cases

• Procurement teams standardizing negotiation prep inside Slack.
• SaaS operators automating supplier negotiation playbooks using Supplier_ID history.
• Automation engineers showcasing an end-to-end Slack + n8n webhook + Sheets + Groq pattern.

Technical details

• Integrations: Slack, Alpha Vantage, Google Sheets, Groq
• n8n nodes used: set, merge, switch, webhook, aggregate, sticky note
• Core mechanics: Slack Block Kit responses, interactive buttons, Slack modals, Groq-based structured outputs, session logging to Google Sheets