Amazon Keyword Expansion API

REST API and MCP service documentation generated from server-side API definitions. Responses use the shared code, msg, and data envelope.

API selector

Keyword & Search Demand

API overview

Expand seed keywords across 10 Amazon marketplaces with search volume, trends, PPC bids, ranking difficulty, and related metrics.

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Endpoint

https://api.nexscope.ai/api/skill-api/v1/skills/amazon-keyword-expansion/run

MCP method

nexscope_amazon_keyword_expansion

Authentication

All run endpoints require a user API key. Send it as a bearer token in the Authorization header.

Authorization: Bearer nk-xxxxxxxxxxxxxxxxx

Missing or invalid API keys return an authentication error. Manage keys from .

POSThttps://api.nexscope.ai/api/skill-api/v1/skills/amazon-keyword-expansion/run

Run an API

Request parameters documented by ecommerce.amazon-keyword-expansion.

Slug	`amazon-keyword-expansion`
Headers	`Authorization: Bearer nk-...` `Content-Type: application/json`
Request body	API-specific JSON object.
Response body	Platform envelope: code, msg, data, ts, time, cost, traceId. Inspect data.status for asynchronous completion.

Status codes

Code	Description
200	HTTP request completed. Check JSON code; only 0 indicates business success or acceptance.
400	Request JSON or required API parameters are invalid.
401	API key is missing, invalid, or cannot be matched to a user.
5xx	API execution or upstream service failed.

Example request

curl -X POST https://api.nexscope.ai/api/skill-api/v1/skills/amazon-keyword-expansion/run \
  -H "Authorization: Bearer nk-xxxxxxxxxxxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{   "marketplace": "us",   "searchTerms": "phone case",   "needCount": 10 }'

All categories/ Keyword & Search Demand

POSThttps://api.nexscope.ai/api/skill-api/v1/skills/amazon-keyword-expansion/run

Run this API

Send a JSON request to execute this API and receive the documented response payload.

Try the free keyword tool Open tester

Endpoint

Method	`POST`
Path	`https://api.nexscope.ai/api/skill-api/v1/skills/amazon-keyword-expansion/run`
Auth	`Bearer API key`
Content-Type	`application/json`

Request body

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)
`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

Request example

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

Response body

Name	Type	Required	Description
`data`	`any`	required	Data value used by this API operation.
`code`	`integer`	required	0 means accepted or successful; nonzero is a platform error.
`msg`	`string \| null`	required	Msg value used by this API operation.
`ts`	`string`	required	Epoch milliseconds.
`time`	`string`	required	Server local time: yyyy-MM-dd HH:mm:ss.
`cost`	`string`	required	Elapsed milliseconds, never credits; -1 outside web requests.
`traceId`	`string \| null`	required	Trace id value used by this API operation.

Any of option 1

Name	Type	Required	Description
`data`	`object`	required	Data value used by this API operation.
`data.costToken`	`integer`	optional	Tokens consumed Example: 1
`data.keywordInfoList`	`array`	optional	Keyword information list Example: []
`data.keywordInfoList[].name`	`string`	optional	Keyword name Example: null
`data.keywordInfoList[].country`	`string`	optional	Marketplace code Example: null
`data.keywordInfoList[].monthlySearchVolumeExact`	`integer`	optional	Monthly average exact match search volume Example: 1
`data.keywordInfoList[].monthlySearchVolumeBroad`	`integer`	optional	Monthly average broad match search volume Example: 1
`data.keywordInfoList[].monthlyTrend`	`number`	optional	Monthly search volume change percentage Example: 1
`data.keywordInfoList[].quarterlyTrend`	`number`	optional	Quarterly search volume change percentage Example: 1
`data.keywordInfoList[].dominantCategory`	`string`	optional	Category with the highest share in search results Example: null
`data.keywordInfoList[].relevancyScore`	`integer`	optional	Relative relevance score to the seed keyword. Higher values indicate a closer match; the upstream provider does not document a fixed 0-100 range Example: 1
`data.keywordInfoList[].easeOfRankingScore`	`integer`	optional	Ease of ranking score (higher means easier to rank) Example: 1
`data.keywordInfoList[].organicProductCount`	`integer`	optional	Number of organic ranking products Example: 1
`data.keywordInfoList[].sponsoredProductCount`	`integer`	optional	Number of sponsored products Example: 1
`data.keywordInfoList[].ppcBidExact`	`number`	optional	Exact match PPC suggested bid (USD) Example: 1
`data.keywordInfoList[].ppcBidBroad`	`number`	optional	Broad match PPC suggested bid (USD) Example: 1
`data.keywordInfoList[].spBrandAdBid`	`number`	optional	Sponsored Brand ad suggested bid (USD) Example: 1
`data.keywordInfoList[].recommendedPromotions`	`integer`	optional	Number of recommended promotion giveaways Example: 1
`data.type`	`string`	optional	Provider-specific render or payload type. Example: null
`data.title`	`string`	optional	Provider-specific response title. Example: null
`data.sourceType`	`string`	optional	Provider-specific source platform type. Example: null
`data.sourceTool`	`string`	optional	Provider-specific source tool name. Example: null
`data.costTime`	`integer`	optional	Execution time reported by the upstream provider. Example: null
`data.page`	`integer`	optional	Current page returned by the upstream provider. Example: null
`data.pageSize`	`integer`	optional	Page size returned by the upstream provider. Example: null
`data.pageItemCount`	`integer`	optional	Item count on the current page returned by the upstream provider. Example: null
`data.totalPage`	`integer`	optional	Total page count returned by the upstream provider. Example: null
`data.dataSnapshotMonth`	`string`	optional	Data snapshot month returned by the upstream provider. Example: null

Any of option 2

Name	Type	Required	Description
`data`	`null`	required	Data value used by this API operation.

Response example

Platform response envelope. code 0 indicates success or acceptance; data contains the business result.

{
  "data": {
    "costToken": 1,
    "keywordInfoList": [
      {
        "monthlySearchVolumeExact": 1,
        "monthlySearchVolumeBroad": 1,
        "monthlyTrend": 1,
        "quarterlyTrend": 1,
        "relevancyScore": 1,
        "easeOfRankingScore": 1,
        "organicProductCount": 1,
        "sponsoredProductCount": 1,
        "ppcBidExact": 1,
        "ppcBidBroad": 1,
        "spBrandAdBid": 1,
        "recommendedPromotions": 1
      }
    ]
  },
  "code": 0,
  "msg": null,
  "ts": "0",
  "time": "2026-01-01 00:00:00",
  "cost": "-1",
  "traceId": null
}

Responses

Code	Description
200	HTTP request completed. Check JSON code; only 0 indicates business success or acceptance.
400	Request JSON or required API parameters are invalid.
401	API key is missing, invalid, or cannot be matched to a user.
5xx	API execution or upstream service failed.

Data source, freshness, and limitations

Source, freshness, coverage, rate limits, and estimation notes are not specified in this API definition unless they appear in the request or response field documentation above. Do not assume official marketplace data or real-time freshness when it is not explicitly documented.

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Amazon Keyword Overview API

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Amazon Keyword Search History API

Track exact Amazon keyword search volume in seven-day periods across 10 marketplaces, including the US, UK, Germany, and Japan.

MCP

Use the MCP endpoint when an agent needs to discover and call API tools with JSON-RPC.

GET /api/skill-api/v1/mcp

POST /api/skill-api/v1/mcp
Authorization: Bearer nk-xxxxxxxxxxxxxxxxx
Content-Type: application/json

Call a tool

{
  "jsonrpc": "2.0",
  "id": "tool-call-1",
  "method": "tools/call",
  "params": {
    "name": "nexscope_amazon_keyword_expansion",
    "arguments": {
      "marketplace": "us",
      "searchTerms": "phone case",
      "needCount": 10
    }
  }
}

Online test

Execute the current API with your API key and JSON payload.

88 credits / callAPI usage records

Try it

Send a real request with the same contract shown in the reference.

Endpoint

https://api.nexscope.ai/api/skill-api/v1/skills/amazon-keyword-expansion/run

MCP method

nexscope_amazon_keyword_expansion

API key*

JSON payload*

cURL

curl -X POST \
  https://api.nexscope.ai/api/skill-api/v1/skills/amazon-keyword-expansion/run \
  -H "Authorization: Bearer nk-..." \
  -H "Content-Type: application/json" \
  -d '{ "marketplace": "us", "searchTerms": "phone case", "needCount": 10 }'

Response

No response yet. Run the request to see the response here.