Amazon does not publish a public search volume figure for every keyword. Everything called "Amazon search volume" comes from one of four sources, and they do not return the same kind of number.
So the practical question is not "what is the search volume of this term". It is "which source am I reading, and is its number a count, a rank or an estimate".
Four sources, side by side
| Source | What you get | Who can use it | Count or estimate |
|---|---|---|---|
| Brand Analytics, Top Search Terms | Search Frequency Rank: the term's position among all searches | Brand-registered sellers | Amazon's own data, but a rank, not a count |
| Brand Analytics, Search Query Performance | Search query volume for queries where your own products appeared | Brand-registered sellers | Amazon's own count, limited to your queries |
| Product Opportunity Explorer | Search volume for the terms inside a niche | Sellers with a professional account | Amazon's own count, limited to the niches it covers |
| Third-party keyword data | Estimated monthly searches for any term | Anyone | An estimate |
Two things follow from that table.
The only source that covers any keyword for anyone is an estimate. Amazon's own counts exist, but each is fenced: by brand registration, by your own catalog or by the niches Amazon chose to include.
A rank is not a volume. Search Frequency Rank tells you that one term is searched more than another. It does not tell you by how much. A term at rank 500 may be searched twice as often as the one at rank 1,000, or ten times. How to read the rank and its movement is covered in reading ABA search terms.
Getting the number through an API
If you need search volume for a list of terms, or for terms you have never sold on, the estimate is the source that scales. The keyword research endpoint returns it per keyword, marketplace and month:
curl --request POST \
--url https://ecommercedataapi.com/v1/amazon/keyword-research \
--header "Content-Type: application/json" \
--header "X-API-Key: ${ECOMMERCE_DATA_API_KEY}" \
--data '{
"keywords": "wireless charger",
"marketplace": "US",
"month": "202507",
"page": 1,
"size": 20
}'Each row carries searches (estimated monthly searches) next to the fields that give it meaning:
| Field | What it adds |
|---|---|
searches | Estimated monthly searches for the term on that marketplace |
purchases, purchaseRate | How many of those searches ended in a purchase |
products | How many products compete for the term |
supplyDemandRatio | searches ÷ products: demand per competing product |
searchMonthlyCv, searchMonthlyCr | Change against the previous month, absolute and in percent |
In the documented example, searches is 17,702, purchases is 2,436 and purchaseRate is 0.1376. You can check it yourself: 2,436 ÷ 17,702 = 0.1376.
The Amazon keyword research & search volume API page lists the range filters, for example keeping only terms between 1,000 and 10,000 searches a month.
One month is not the answer
A single month hides seasonality. A term with 20,000 searches in November may have 3,000 in March.
Before you act on a volume figure, pull its history. The keyword research trends endpoint returns the monthly series for one term, and seasonal product research shows how to measure how concentrated a term's year is. To check whether the pattern also exists outside Amazon, see what your options are for a Google Trends API.
Three checks before you trust a number
Whichever source you use, ask three things:
- What period does it cover? A week, a calendar month and "the last 30 days" give three different numbers for the same term.
- What is its scope? Searches across the whole marketplace, or impressions one product received. The second is often labelled "search volume" too.
- When was it measured? A figure without a date cannot be compared with next month's.
Choosing a keyword tool walks through four fields in one response that all look like search volume and are not.
What search volume cannot tell you
It does not tell you whether the term sells. Read purchaseRate next to searches. A large term where few searches end in a purchase is expensive to advertise on.
It does not tell you whether you can rank. products and the strength of the listings on page one decide that. See getting a keyword onto page one.
It does not tell you whether the term fits your product. Relevance is your call. Once you have chosen the terms, filling in backend search terms covers where the ones that did not fit in the title go.
Questions
Is there a free way to check Amazon search volume? If you are brand registered, Brand Analytics costs nothing and is Amazon's own data. It gives you a rank for any term and a count only for queries your products appeared in. For terms outside that, you need an estimate.
Why do two tools show different search volumes for the same keyword? Usually because they show different quantities: different periods, different scopes, or one is a rank converted into a count. Confirm they measure the same thing before comparing.
Is search volume the same in every marketplace? No. The same keyword has separate figures in the US, Japan and each European marketplace. Always pass the marketplace you sell in.
How accurate are the estimates? Accurate enough to compare terms and see direction. Not accurate enough to plan stock from. For your own brand's queries, check them against Search Query Performance.