---
title: "Spyfu (@spyfu)"
description: "Competitor keyword research software for SEO and paid search."
account: "spyfu"
---

# Spyfu

Competitor keyword research software for SEO and paid search.

## APIs

9 public APIs with a stored document.
Each links to its markdown overview; the same address with
`/llms.txt` in place of `.md` lists its operations.
Changes across these APIs: https://skmtc.dev/spyfu/feed.md

- [Account API](https://skmtc.dev/spyfu/apis/account-api.md): API usage: monthly and daily request counts, broken down by method (60-100 chars target)
- [Ranking History API](https://skmtc.dev/spyfu/apis/ranking-history-api.md): SEO: query historical search rankings for domains and keywords over time
- [Keyword API](https://skmtc.dev/spyfu/apis/keyword-api.md): Keyword research: find related, question and transactional search terms with search and ad metrics
- [Kombat API](https://skmtc.dev/spyfu/apis/kombat-api.md): SEO and PPC: compare two domains' keyword overlap, gaps and opportunities in search
- [Competitors API](https://skmtc.dev/spyfu/apis/competitors-api.md): Search competitor discovery: find top paid and organic rivals for any domain via SpyFu data
- [SEO Research API](https://skmtc.dev/spyfu/apis/seo-research-api.md): SEO keyword research: find valuable keywords, track rank and click changes, and compare competitor rankings
- [PPC Research API](https://skmtc.dev/spyfu/apis/ppc-research-api.md): Paid search: pull competitor ads and keyword data from live SERP results
- [Ad History API](https://skmtc.dev/spyfu/apis/ad-history-api.md): Advertising: search a history of Google Ads by domain or keyword, back to 2007
- [Domain Stats API](https://skmtc.dev/spyfu/apis/domain-stats-api.md): SEO analytics: historical search visibility stats for domains, organic and paid keywords over time