# MerchantWords, $79 monthly: Keyword research API

> Get detailed data for a single keyword — volume, depth, trend, strength, prominence, appearance, and SERP statistics when available.

MerchantWords's Starter plan for the keyword research API costs $0.366 per 1,000 keywords. We check each provider's docs for 6 fields. MerchantWords's docs list 1: Search volume.
You pay $79 a month for up to 216,000 calls.
We haven't run MerchantWords through [our keyword research API benchmark](https://datacircle.dev/best-keyword-research-api.txt) yet.
We rank 331 plans for keyword research APIs by price. Half the plans cost $2.388 or less per 1,000 keywords. This plan costs less per 1,000 keywords than 72% of the 331 plans.
[AppDrift's $14.99 monthly plan](https://datacircle.dev/keyword-research-apis/appdrift/14-99-monthly/llms.txt) costs the least per 1,000 keywords. AppDrift's keyword research API costs nothing beyond the plan price. [Pixel Tools's ₽99 pack](https://datacircle.dev/keyword-research-apis/pixel-tools/99-pack-guru-for-99-rubles-post-api-wordstatapi-wordstatapi/llms.txt) costs the least for 10,000 keywords a month: about $1.18.
[seodata.dev's $4.99 monthly plan](https://datacircle.dev/keyword-research-apis/seodata-dev/4-99-monthly/llms.txt) covers any number of keywords. seodata.dev's $4.99 monthly plan costs less up front than AppDrift's $14.99 monthly plan.
[DataForSEO](https://datacircle.dev/keyword-research-apis/dataforseo/top-up-from-50-pay-as-you-go-post-v3-dataforseo-labs-google-keyword-overview-live/llms.txt), [AppDrift](https://datacircle.dev/keyword-research-apis/appdrift/14-99-monthly/llms.txt) and [Bing Webmaster Tools](https://datacircle.dev/keyword-research-apis/bing-webmaster-tools/free-get-webmaster-api-svc-json-getkeywordstats/llms.txt) are the best keyword research API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/keyword-research-apis/merchantwords/79-monthly
- [Keyword research API: the best SEO keyword data providers](https://datacircle.dev/best-keyword-research-api.txt)
- Get it: https://www.merchantwords.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Request: `POST https://api.merchantwords.com/v2/keyword`
- API key: with the plan, on https://www.merchantwords.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Its API docs: https://www.merchantwords.com/api/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Sold by: MerchantWords (https://www.merchantwords.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 17%
- Search volume: ✓

## Price

- $ per 1,000 keywords: $0.366
- Per: call
- Billing: monthly
- $ a month: $79

## Charges

- Also pays for: from the same budget: ASIN product lookup · Reverse ASIN search · SERP products · Keyword search · Related keywords (SERP overlap)

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Get detailed data for a single keyword — volume, depth, trend, strength, prominence, appearance, and SERP statistics when available.

## Data

- Keep data: while your subscription is active
- Use data: While you are an active subscriber, you may: Use the data for any internal purpose within your business. Build and sell derivative works -- products, tools, reports, and insights that incorporate MerchantWords data -- to your own customers. Cache and store API responses for reasonable operational use while your subscription is active. If your subscription ends, you agree to delete any cached or stored MerchantWords data. The one hard line: you may NOT redistribute, resell, sublicense, expose, or otherwise hand over the raw MerchantWords data itself (in whole or in substantial part) to any third party. [...] You also agree not to: misrepresent the source of the data, use the API in a way that could impair or harm MerchantWords or anyone's use of its services, attempt to gain unauthorized access to its systems, or reverse engineer the API except where applicable law expressly permits. [...] You agree to: Respect all rate limits and usage quotas applicable to your plan, Request from the API only the minimum data that your Application needs to offer its intended functionality, Not use the API in any manner that threatens the integrity, performance, or reliability of the API or any MerchantWords service, Not work around any technical limitations in the API, Not use the API for performance or stress testing

## Plan

- Pay: $79
- Enough for: 216,000 calls a month

## Rate limit

- Per second: 0.083
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: keyword. Optional: country
- Method: POST
- Path: /keyword

## About the plan

- Plan: Starter
- Who can get it: anyone who subscribes and accepts the API Terms

## The 17 fields the plan's answer can hold

keyword, country, found, search volume, depth, trend, 3-month average volume, 12-month average volume, strength, prominence, appearance, in latest batch, monthly volumes, SERP results count, SERP organic count, SERP sponsored count, SERP total reviews

## MerchantWords's plans (6)

- [MerchantWords, $79 monthly](https://datacircle.dev/keyword-research-apis/merchantwords/79-monthly/llms.txt): $0.366 per 1,000, 17% complete
- [MerchantWords, $499 monthly, Pro, POST /keyword](https://datacircle.dev/keyword-research-apis/merchantwords/499-monthly-pro-post-keyword/llms.txt): $1.155 per 1,000, 17% complete
- [MerchantWords, $1,499 monthly, Enterprise, POST /keyword](https://datacircle.dev/keyword-research-apis/merchantwords/1499-monthly-enterprise-post-keyword/llms.txt): $1.157 per 1,000, 17% complete
- [MerchantWords, $790 yearly](https://datacircle.dev/keyword-research-apis/merchantwords/790-yearly/llms.txt): $0.305 per 1,000, 17% complete
- [MerchantWords, $4,990 yearly, Pro annual, POST /keyword](https://datacircle.dev/keyword-research-apis/merchantwords/4990-yearly-pro-annual-post-keyword/llms.txt): $0.963 per 1,000, 17% complete
- [MerchantWords, $14,990 yearly, Enterprise annual, POST /keyword](https://datacircle.dev/keyword-research-apis/merchantwords/14990-yearly-enterprise-annual-post-keyword/llms.txt): $0.964 per 1,000, 17% complete

## MerchantWords's calls for this API (2)

- `POST /keyword`: [MerchantWords, $79 monthly](https://datacircle.dev/keyword-research-apis/merchantwords/79-monthly/llms.txt)
- `POST /bulk-keywords`: [MerchantWords, $499 monthly, Pro, POST /bulk-keywords](https://datacircle.dev/keyword-research-apis/merchantwords/499-monthly-pro-post-bulk-keywords/llms.txt)

## MerchantWords's APIs (4)

- [MerchantWords: Amazon product API pricing, 6 plans](https://datacircle.dev/amazon-product-apis/merchantwords/79-monthly/llms.txt)
- [MerchantWords: Amazon search API pricing, 6 plans](https://datacircle.dev/amazon-search-apis/merchantwords/79-monthly/llms.txt)
- [MerchantWords: keyword research API pricing, 6 plans](https://datacircle.dev/keyword-research-apis/merchantwords/79-monthly/llms.txt)
- [MerchantWords: related keywords API pricing, 6 plans, POST /keyword-search](https://datacircle.dev/related-keywords-apis/merchantwords/79-monthly-starter-post-keyword-search/llms.txt)
- [MerchantWords: related keywords API pricing, 6 plans, POST /related-keywords](https://datacircle.dev/related-keywords-apis/merchantwords/79-monthly-starter-post-related-keywords/llms.txt)

## MerchantWords: keyword research API alternatives

- [Arsenkin Tools, ₽2,490 monthly](https://datacircle.dev/keyword-research-apis/arsenkin-tools/2490-monthly/llms.txt): $0.346 per 1,000, 17% complete
- [Word-Keeper, ₽749 monthly](https://datacircle.dev/keyword-research-apis/word-keeper/749-monthly/llms.txt): $0.358 per 1,000, 17% complete
- [Omkar Cloud, $148 monthly, Scale Plan, GET /keywords/overview](https://datacircle.dev/keyword-research-apis/omkar-cloud/148-monthly-scale-plan-get-keywords-overview/llms.txt): $0.37 per 1,000, 67% complete, live
- [SpyFu, $2,244 yearly, Team / Agency, GET /apis/keyword_api/v2/related/getKeywordInformation](https://datacircle.dev/keyword-research-apis/spyfu/2244-yearly-team-agency-get-apis-keyword-api-v2-related-getkeywordinformation/llms.txt): $0.374 per 1,000, 67% complete, 1 month
- [WordRadar, $49 pack](https://datacircle.dev/keyword-research-apis/wordradar/49-pack/llms.txt): $0.377 per 1,000, 0% complete, 24 hours

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-10.

- https://www.merchantwords.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://www.merchantwords.com/api/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://www.merchantwords.com/api/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://www.merchantwords.com/openapi.yaml?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://www.merchantwords.com/terms-conditions-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing