AI-Assisted Product Comparison Tool Creation

Project Title: Build Smart Product Replacement Finder in n8n (with AI + Global Search)

Goal:
I want an automation built in n8n that uses AI and shopping APIs to find cheaper but equal or better products based on a reference item and its specifications. This tool will help me compare items for my contracts or procurement projects and always choose the most cost-effective option.

What the system should do:
Input Manually in n8n:

ref_url: link of the reference product

ref_spec: technical description or features (plain text)

AI Summary + Keyword Generation:

Use OpenAI GPT to extract important features/specs.

Generate 2–3 smart product search terms based on those specs (exclude brand names).

Deep Global Product Search:

Use SerpAPI or another search engine API (not GPT search!) to scan shopping websites.

Return up to 10 real products with:

Title

Price

Seller

Product link

Description

Compare Alternatives:

Use GPT to compare these alternatives to the original spec.

Identify which ones fully match or exceed the requirements.

Select the best one with the lowest price.

Final Output:

One best-matching product

Why it is equal or better

Comparison table (Original vs. Alternative)

Exportable JSON or table output

Tools:
n8n (your automation platform)

OpenAI (for smart spec analysis)

SerpAPI or similar (for actual product search – not GPT “fake results”)

No servers — all done inside n8n