n8n AI Draft Proposal Workflow: Anthropic & Gemini Webhook

Draft AI proposals automatically with Anthropic & Gemini via a Webhook

This n8n workflow lets you generate AI-assisted draft proposals by calling Anthropic and Gemini through a webhook—so your team can request a proposal draft on demand and receive the result back immediately.

What this workflow does

• Receives an incoming request: The workflow starts with a webhook that accepts proposal-related input.
• Routes logic with conditions: An if node determines the path based on the request (for example, which model/provider to use or how to handle provided parameters).
• Builds and prepares the request: A code node prepares the payload needed to query the selected AI provider.
• Calls the AI endpoints: An http request node sends the prepared prompt/data to the chosen provider (Anthropic or Gemini) and retrieves the generated draft.
• Returns the draft to the caller: The workflow uses respond to webhook to send the AI draft proposal output back as a direct webhook response.

Use cases

• SaaS proposal generation: Generate proposal drafts for new sales opportunities from a single API call.
• Automation engineers: Create a model-agnostic “AI proposal” endpoint that can switch between Anthropic and Gemini.
• Operational efficiency: Reduce manual writing by producing first-draft content that stakeholders can quickly review and edit.
• Internal tools: Power a lightweight web form or backend service that triggers proposal drafting via webhook.

Technical details

• n8n nodes: webhook, if, code, http request, respond to webhook, sticky note
• AI providers supported: Anthropic and Gemini (selected via workflow logic)

Ideal for n8n users who want an actionable, webhook-driven AI draft proposal automation with Anthropic and Gemini.