Amazon Research JS

Amazon Research JS: keywords/by asin API

Amazon Research JS: keywords/by asin API.

MCP tool name

nexscope_data_js_keywords_by_asin

MCP endpoint

https://api.nexscope.ai/mcp

JSON-RPC method

tools/call

Authentication

Use OAuth 2.1 Authorization Code with PKCE and the mcp:tools scope. API keys remain supported as a compatibility option.

Authorization: Bearer nk-xxxxxxxxxxxxxxxxx

If authentication fails, ask the user to open API Access and copy a valid key.

Call this MCP tool

Initialize an MCP 2025-11-25 Streamable HTTP session at https://api.nexscope.ai/mcp, then use tools/call.

{
  "jsonrpc": "2.0",
  "id": "data-js-keywords-by-asin-1",
  "method": "tools/call",
  "params": {
    "name": "nexscope_data_js_keywords_by_asin",
    "arguments": {
      "asins": [
        "B0DXXXXXXX"
      ],
      "marketplace": "us",
      "needCount": 50,
      "sort": "-monthly_search_volume_exact"
    }
  }
}

MCP 2025-11-25 · Streamable HTTP

Progress is delivered on the original POST SSE response. GET SSE carries notifications; reconnecting must query existing asynchronous work rather than submit again.

Arguments

Name	Type	Required	Description
`marketplace`	`string`	required	Target market code. Optional values: `us`, `uk`, `de`, `in`, `ca`, `fr`, `it`, `es`, `mx`, `jp` Example: us
`asins`	`string[]`	required	List of ASINs, up to 10 Example: {}
`needCount`	`integer`	optional	Total number of results returned (internal automatic pagination) Example: {}
`includeVariants`	`boolean`	optional	Whether to include keywords for variant products Example: {}
`sort`	`string`	optional	Sorting field; optional values see the sorting field table below Example: -monthly_search_volume_exact
`minMonthlySearchVolumeExact`	`integer`	optional	Minimum monthly precise search volume (1-999999) Example: {}
`maxMonthlySearchVolumeExact`	`integer`	optional	Maximum monthly precise search volume (1-999999) Example: {}
`minMonthlySearchVolumeBroad`	`integer`	optional	Minimum monthly broad search volume (1-999999) Example: {}
`maxMonthlySearchVolumeBroad`	`integer`	optional	Maximum monthly broad search volume (1-999999) Example: {}
`minWordCount`	`integer`	optional	Minimum number of words (1-99999) Example: {}
`maxWordCount`	`integer`	optional	Maximum number of words (1-99999) Example: {}
`minOrganicProductCount`	`integer`	optional	Minimum number of natural search results (1-99999) Example: {}
`maxOrganicProductCount`	`integer`	optional	Maximum number of natural search results (1-99999) Example: {}

Response fields

Treat structuredContent as the programmatic API response payload.

Name	Type	Required	Description
`costToken`	`integer`	optional	Number of tokens consumed Example: {}
`keywordInfoList`	`array`	optional	Keyword information list Example: {}
`name`	`string`	optional	keywords Example: {}
`country`	`string`	optional	market code Example: {}
`monthlySearchVolumeExact`	`integer`	optional	Monthly exact match search volume Example: {}
`monthlySearchVolumeBroad`	`integer`	optional	Monthly broad match search volume Example: {}
`monthlyTrend`	`float`	optional	Month-on-month trend (%) Example: {}
`quarterlyTrend`	`float`	optional	Quarterly Trend (%) Example: {}
`dominantCategory`	`string`	optional	Main categories Example: {}
`relevancyScore`	`integer`	optional	Relevance of keywords to ASIN (0-100) Example: {}
`easeOfRankingScore`	`integer`	optional	Ease of ranking (0-100, the higher it is, the easier it is to rank) Example: {}
`organicRank`	`integer`	optional	ASIN’s organic search ranking Example: {}
`sponsoredRank`	`integer`	optional	Ad Rank for ASIN Example: {}
`overallRank`	`integer`	optional	Comprehensive ranking position Example: {}
`organicProductCount`	`integer`	optional	Total number of products in organic search results Example: {}
`sponsoredProductCount`	`integer`	optional	Total number of advertising space products Example: {}
`ppcBidExact`	`float`	optional	Exact match PPC recommended bid (USD) Example: {}
`ppcBidBroad`	`float`	optional	Broad Match PPC Recommended Bid (USD) Example: {}
`spBrandAdBid`	`float`	optional	SP Brand Ad Recommended Bid (USD) Example: {}
`recommendedPromotions`	`integer`	optional	Recommended promotion amount Example: {}
`primaryAsin`	`string`	optional	The highest ranking ASIN for this keyword Example: {}
`relativeOrganicPosition`	`float`	optional	Query the relative natural ranking position of an ASIN Example: {}
`relativeSponsoredPosition`	`float`	optional	Query the relative ad ranking position of ASIN Example: {}
`organicRankingAsinsCount`	`integer`	optional	Number of query ASINs with natural rankings Example: {}
`sponsoredRankingAsinsCount`	`integer`	optional	Number of query ASINs with ad ranking Example: {}
`avgCompetitorOrganicRank`	`float`	optional	Query the average organic position of an ASIN Example: {}
`avgCompetitorSponsoredRank`	`float`	optional	Query the average ad position for an ASIN Example: {}
`variationLowestOrganicRank`	`integer`	optional	Best organic position among variations Example: {}
`variationLowestSponsoredRank`	`integer`	optional	Best ad position among variations Example: {}
`competitorOrganicRank`	`array`	optional	Natural ranking for each ASIN, element `{asin, organicRank}` Example: {}
`competitorSponsoredRank`	`array`	optional	Ad rank for each ASIN, element `{asin, sponsoredRank}` Example: {}
`updatedAt`	`string`	optional	Data last updated time Example: {}
`asin`	`string`	optional	ASIN Example: {}
`organicRank`	`integer`	optional	The ASIN’s organic search ranking Example: {}
`asin`	`string`	optional	ASIN Example: {}
`sponsoredRank`	`integer`	optional	Ad Rank for this ASIN Example: {}

Examples

Example arguments

{
  "asins": [
    "B0DXXXXXXX"
  ],
  "marketplace": "us",
  "needCount": 50,
  "sort": "-monthly_search_volume_exact"
}

Example structuredContent

{
  "code": 0,
  "cost": "-1",
  "data": {},
  "msg": null,
  "time": "2026-01-01 00:00:00",
  "traceId": null,
  "ts": "0"
}