Amazon Research JS

Amazon Research JS: sales estimates/query API

Amazon Research JS: sales estimates/query API.

MCP tool name

nexscope_data_js_sales_estimates_query

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-sales-estimates-query-1",
  "method": "tools/call",
  "params": {
    "name": "nexscope_data_js_sales_estimates_query",
    "arguments": {
      "asin": "B0CXXX1234",
      "endDate": "2026-03-31",
      "marketplace": "us",
      "startDate": "2026-03-01"
    }
  }
}

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
`asin`	`string`	required	Amazon ASIN to query Example: {}
`startDate`	`string`	required	Start date (format: YYYY-MM-DD) Example: {}
`endDate`	`string`	required	End date (format: YYYY-MM-DD); must be before the current date Example: {}

Response fields

Treat structuredContent as the programmatic API response payload.

Name	Type	Required	Description
`costToken`	`integer`	optional	Number of tokens consumed Example: {}
`salesEstimateList`	`array`	optional	Sales estimate result list Example: {}
`asin`	`string`	optional	Query ASIN Example: {}
`id`	`string`	optional	Data point identification Example: {}
`type`	`string`	optional	Resource type, fixed value `sales_estimate_result` Example: {}
`parentAsin`	`string`	optional	Parent ASIN (returned in variant scenarios) Example: {}
`isParent`	`boolean`	optional	Is it a parent product? Example: {}
`isVariant`	`boolean`	optional	Whether it is a variant product Example: {}
`isStandalone`	`boolean`	optional	Whether it is an independent product (non-variant) Example: {}
`variants`	`array`	optional	An array of variant ASINs under this parent Example: {}
`dailyEstimates`	`array`	optional	Array of daily estimated data Example: {}
`date`	`string`	optional	Data date (YYYY-MM-DD) Example: {}
`estimatedUnitsSold`	`integer`	optional	Estimated number of pieces sold on the day Example: {}
`lastKnownPrice`	`number`	optional	Last known price (USD) Example: {}

Examples

Example arguments

{
  "asin": "B0CXXX1234",
  "endDate": "2026-03-31",
  "marketplace": "us",
  "startDate": "2026-03-01"
}

Example structuredContent

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