Can a prompt replace SpyFu?

Build a keyword-gap tool comparing your domain against one competitor's, for a keyword list you provide — not a historical-ads database, which isn't realistically reproducible. Use the same SERP API approach as a personal rank tracker (query a pay-as-you-go SERP API, not direct scraping) but query it for two domains per keyword: yours and one named competitor's. Use Python or Node with SQLite. For each keyword, store both domains' ranking positions (or 'not ranking' if outside the top 100) and flag keywords where the competitor ranks and you don't, or ranks meaningfully higher. Build a simple sorted table of these gap keywords as the main output — that's the actionable result. Add a basic historical view showing position changes over the weeks you've been running it, but be upfront that this only starts from when you start running the tool, with no retroactive history. Do not build ad/PPC tracking, ad-copy history, or multi-competitor comparison — those are out of scope; this compares exactly your domain and one competitor's, going forward only. Needs hosting for a scheduled job, a small database, and a SERP API subscription with its own per-query cost.