Amazon Keyword Research API — Volume, Related & Reverse ASIN

Bulk Amazon keyword metrics via a native data API — estimated Amazon search volume, related keywords, and reverse-ASIN (every keyword a product ranks for, with its position). A cheap, pay-per-use, no-subscription alternative to Helium 10 / Jungle Scout / MerchantWords — $0.99 per 1,000 keywords, no monthly floor.

v1 is US marketplace. Search volume is an estimate (Amazon hides official figures — every tool estimates). Reverse-ASIN keyword positions are factual (observed Amazon SERP rankings).

What you get — 3 modes

Mode	Input	Output
search_volume	keywords[]	Estimated monthly Amazon search volume per keyword
related_keywords	keyword seed	Related Amazon keywords + volume (long-tail discovery)
reverse_asin	asin	Every keyword the product ranks for + its Amazon position

Quick start

{ "mode": "search_volume", "keywords": ["wireless earbuds", "yoga mat", "coffee maker"], "country": "us" }

{ "mode": "reverse_asin", "asin": "B0BDHWDR12", "country": "us", "maxKeywords": 100 }

Output example (search_volume)

[
  { "keyword": "coffee maker", "amazon_search_volume": 181315, "country": "us", "source": "estimated" },
  { "keyword": "yoga mat",     "amazon_search_volume": 82280,  "country": "us", "source": "estimated" }
]

Output example (reverse_asin)

One flat dataset row per ranked keyword. rank is the factual observed Amazon SERP position (the value that matters here); the run log reports the ASIN's total ranked-keyword count.

[
  { "asin": "B0BDHWDR12", "keyword": "magsafe airpods 2", "rank": 1, "amazon_search_volume": 0, "country": "us", "source": "factual" },
  { "asin": "B0BDHWDR12", "keyword": "ticpods 2 pro plus", "rank": 2, "amazon_search_volume": 0, "country": "us", "source": "factual" }
]

Note: amazon_search_volume is often 0 in reverse_asin output — the underlying ranked-keywords data reports little to no volume for long-tail ranked terms. Use rank for reverse-ASIN analysis; if you need volume for those keywords, feed them back through search_volume mode.

Pricing

Pay per event, no subscription. You pay only for successful runs — failed or empty scans are never billed. No monthly minimum, no seat fees. Each run charges a small actor-start fee plus one event for the mode you ran.

Event	Fires	Price (FREE / BRONZE tier)
actor-start	once per run (input validation + cache check)	$0.05
search-volume	once, after a successful keyword volume call (up to 1,000 kw)	$0.99 / 1k
related-keywords	once, after a successful related-keywords call	$0.20
reverse-asin	once, after a successful ranked-keywords call	$0.30

Volume discounts by Apify plan tier

Higher Apify subscription tiers get automatic per-event discounts — built for agencies and developers running keywords and ASINs at scale. actor-start stays flat across all tiers.

Event	FREE	BRONZE	SILVER	GOLD
search-volume (per 1k)	$0.99	$0.95	$0.85	$0.75
related-keywords	$0.20	$0.19	$0.17	$0.15
reverse-asin	$0.30	$0.28	$0.25	$0.20

Tiers are determined by your Apify plan; the discounted unit price is applied automatically per run. PLATINUM / DIAMOND (enterprise) pricing available on request.

A single search_volume run of 1,000 keywords costs $1.04 (start + batch) on FREE/BRONZE — versus $29–$129/mo subscriptions elsewhere.

How it compares

	This actor	Helium 10	Jungle Scout	MerchantWords
Entry price	pay-per-use, $0.99/1k	$129/mo	$49/mo	$29/mo (500 searches)
Public keyword API	✅	Enterprise only ($1,499/mo)	❌	❌
Reverse-ASIN	✅ (= Cerebro)	✅ (paid)	✅ (paid)	partial
No subscription	✅	❌	❌	❌

Built for agencies running many ASINs, developers, and sub-$1M sellers who can't justify a $129/mo seat.

What it does NOT do (honest scope)

• v1 = US marketplace only (more marketplaces in v0.2).
• Search volume is estimated (no tool has Amazon's official numbers); use it for relative prioritization, not absolute truth. Reverse-ASIN positions are observed/factual.
• No PPC bid data, no listing optimizer, no rank-tracking-over-time yet (v0.2).

FAQ

Is the search volume official? No — Amazon hides it; every tool (Helium 10, MerchantWords, this one) estimates it. We label it estimated.

Are the reverse-ASIN rankings real? Yes — those are observed Amazon search positions, not estimates.

Do I need a subscription? No. Pay per use; failed runs aren't charged.

What is Amazon keyword research? Finding the search terms Amazon shoppers actually type, plus their estimated search volume, so you can put the right keywords in your listing title, bullets and backend. This actor returns estimated Amazon search volume, related keywords and reverse-ASIN data for exactly that.

How does a reverse-ASIN lookup work? Give it a product's ASIN and it returns every keyword that product ranks for on Amazon, with its position — so you can see what drives a competitor's sales and target the same terms. (This is the Helium 10 "Cerebro" use case, pay-per-use.)

What's the difference between high-volume and high-conversion keywords? High-volume keywords get the most searches but are broad and competitive; high-conversion keywords are more specific and closer to a purchase. Use volume to size demand and reverse-ASIN positions to find the specific terms competitors actually rank for.

Is this safe for AI agents to run? Yes. It runs under limited permissions — it only does its job (queries the Amazon keyword API and writes your dataset) and never touches the rest of your Apify account, so there's no full-permission approval step. Run it from any AI agent or IDE via the Apify MCP server (mcp.apify.com).

Related Actors

• Keyword Metrics Pro — Google + Bing keyword volume, CPC & trend.
• AI Keyword Clustering Tool — cluster your Amazon keywords into topics.
• Competitor Keyword Research — any site's ranked keywords.
• Amazon Product Scraper — pull product data for your ASINs.

Disclaimer

Provided as-is for research. Estimated search volumes are best-effort. Independent project — not affiliated with, endorsed by, or partnered with Amazon.com, Helium 10, Jungle Scout, or MerchantWords.

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