Amazon Research JS

Amazon Keyword Expansion

Find related Amazon keywords and compare search demand. Call the Amazon Keyword Expansion API via REST or MCP from 88 credits per call.

MCP tool name

nexscope_amazon_keyword_expansion

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": "amazon-keyword-expansion-1",
  "method": "tools/call",
  "params": {
    "name": "nexscope_amazon_keyword_expansion",
    "arguments": {
      "marketplace": "us",
      "needCount": 10,
      "searchTerms": "phone case"
    }
  }
}

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 marketplace code. Options: us, uk, de, in, ca, fr, it, es, mx, jp. Default us Example: us
`searchTerms`	`string`	required	Seed keyword (single keyword string) Example: phone case
`needCount`	`integer`	optional	Total number of results returned Example: 10
`sort`	`string`	optional	Sort field, default -monthly_search_volume_exact (exact search volume descending) Example: {}
`minMonthlySearchVolumeExact`	`integer`	optional	Minimum exact search volume Example: 1
`maxMonthlySearchVolumeExact`	`integer`	optional	Maximum exact search volume Example: 1
`minMonthlySearchVolumeBroad`	`integer`	optional	Minimum broad search volume Example: 1
`maxMonthlySearchVolumeBroad`	`integer`	optional	Maximum broad search volume Example: 1
`minWordCount`	`integer`	optional	Minimum word count for keywords (for filtering long-tail keywords) Example: 1
`maxWordCount`	`integer`	optional	Maximum word count for keywords Example: 1
`minOrganicProductCount`	`integer`	optional	Minimum organic product count Example: 1
`maxOrganicProductCount`	`integer`	optional	Maximum organic product count Example: 1

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	Keyword name Example: {}
`country`	`string`	optional	market code Example: {}
`monthlySearchVolumeExact`	`integer`	optional	Average monthly exact match search volume Example: {}
`monthlySearchVolumeBroad`	`integer`	optional	Average monthly broad match search volume Example: {}
`monthlyTrend`	`number`	optional	Monthly search volume percentage change Example: {}
`quarterlyTrend`	`number`	optional	Quarterly search volume percentage change Example: {}
`dominantCategory`	`string`	optional	Category with the highest proportion in search results Example: {}
`relevancyScore`	`integer`	optional	Relevance score to seed word Example: {}
`easeOfRankingScore`	`integer`	optional	Ease of ranking score (the higher, the easier it is to rank) Example: {}
`organicProductCount`	`integer`	optional	Number of naturally ranked products Example: {}
`sponsoredProductCount`	`integer`	optional	Advertising product quantity Example: {}
`ppcBidExact`	`number`	optional	Exact match PPC recommended bid (USD) Example: {}
`ppcBidBroad`	`number`	optional	Broad match PPC recommended bid (USD) Example: {}
`spBrandAdBid`	`number`	optional	Sponsored Brand Ad Recommended Bid (USD) Example: {}
`recommendedPromotions`	`integer`	optional	Recommended promotional gift quantity Example: {}

Examples

Example arguments

{
  "marketplace": "us",
  "needCount": 10,
  "searchTerms": "phone case"
}

Example structuredContent

{}