Best Search & SEO APIs (2026)
Best Search & SEO APIs (2026) are ReefAPI category hubs for live JSON: search and SEO APIs return SERP, keyword, trend and discovery signals. ReefAPI offers 4 non-legal search & seo APIs behind one key, one credit pool and the same { ok, data, meta, error } envelope, with examples derived from the catalog and committed live snapshots.
Ranked Search & SEO API list
Ranked by catalog action count, then alphabetically for ties; legal-heavy engines are excluded.
| # | Engine | What it returns | Actions | Snapshot sample | Free tier | Landing |
|---|---|---|---|---|---|---|
| 1 | Google Trends | keywords[], geo, timeframe, timeline[] (date/value 0-100; per-keyword `values` when comparing) | 8 | keywords: bitcoin; geo: US | yes | View API |
| 2 | Google Search | query, hl, gl, location?, device?, organic_results[] (rank/title/url/displayed_url/snippet), pe... | 6 | query: best laptop 2026; hl: en | yes | View API |
| 3 | Bing Search API | engine, query, mkt, page_offset, total_estimate, count, results[] (position/title/url/displayed... | 4 | title: Best Buy | Official Online Store | Shop Now & Save | yes | View API |
| 4 | SEO Toolkit | seed, source, depth, count, suggestions[] (keyword ideas); with url also source_url + extracted... | 4 | seed: running shoes; source: google | yes | View API |
What each Search & SEO API covers
Google Trends includes 8 actions (interest_over_time, related_queries, related_topics). Search interest over time, by region, and trending now. The primary catalog return is keywords[], geo, timeframe, timeline[] (date/value 0-100; per-keyword `values` when comparing).
Google Search includes 6 actions (search, news, images). Google search results and news. The primary catalog return is query, hl, gl, location?, device?, organic_results[] (rank/title/url/displayed_url/snippet), pe....
Bing Search API includes 4 actions (search, news, videos). Bing Search API The primary catalog return is engine, query, mkt, page_offset, total_estimate, count, results[] (position/title/url/displayed....
SEO Toolkit includes 4 actions (keyword_suggestions, rank_tracking, serp_competitors). Keyword ideas, rank tracking and SERP analysis. The primary catalog return is seed, source, depth, count, suggestions[] (keyword ideas); with url also source_url + extracted....
Questions about Search & SEO APIs
Which Search & SEO API is free?
Every Search & SEO API listed here can be tried with ReefAPI's free tier: 1,000 credits on signup, no card required. The current hub includes Google Trends, Google Search, Bing Search API, SEO Toolkit.
Do these Search & SEO APIs need login?
No source-site login is needed for the listed ReefAPI responses. You call ReefAPI with an x-api-key header, and each engine returns the standard JSON envelope.
How fresh is the Search & SEO data?
Production requests fetch live data through ReefAPI. The table's sample data point comes from the committed snapshot for each engine, and the sitemap uses catalog freshness for recrawling.
What is the best Search & SEO API to start with?
Google Trends appears first because this hub ranks engines by action count, then alphabetically for ties. Use that as a coverage signal, then choose the API whose returned fields match your workflow.