Mercado Libre Product Research

Mercado Libre Product Research: product Selection API

Mercado Libre Product Research: product Selection API.

MCP tool name

nexscope_data_mercado_product_selection

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-mercado-product-selection-1",
  "method": "tools/call",
  "params": {
    "name": "nexscope_data_mercado_product_selection",
    "arguments": {
      "arguments": {
        "searchText": "Auriculares",
        "siteId": "MLM"
      },
      "toolName": "categorySearch"
    }
  }
}

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
`toolName`	`string`	required	One of 24 Meike multi-tool names, see table below. Example: {}
`arguments`	`object`	required	The parameter object of the corresponding tool must be a JSON object and cannot be an array, string or number; the backend will remove `uId`, `uid`, `memberId` and crop empty values. Example: {}

Response fields

Treat structuredContent as the programmatic API response payload.

Name	Type	Required	Description
`code`	`string`	optional	Nexscope encapsulation layer status; `"200"` on success. May be omitted in case of business error. Example: {}
`msg`	`string`	optional	Encapsulation layer message; `"ok"` on success. Example: {}
`errcode`	`integer`	optional	Gateway status code; if successful, it is `200`, if there is a business error, it is non-`200`. Example: {}
`errmsg`	`string`	optional	Gateway error or status message. Example: {}
`type`	`string`	optional	Currently usually `rawMcpToolResult`. Example: {}
`toolName`	`string`	optional	The name of the tool actually called. Example: {}
`charged`	`boolean`	optional	Is there a fee for this tool? Example: {}
`data`	`string/object/array`	optional	Business data unpacked from the MCP text content; most tools return a string. Example: {}
`rawResponse`	`object`	optional	MCP `tools/call` Raw result; the current gateway usually returns an empty object. Example: {}
`contentText`	`string`	optional	MCP text content The spliced original text. Example: {}
`textParsedAsJson`	`boolean`	optional	Whether `contentText` is successfully parsed into JSON; it may also be `true` when the text is wrapped in a JSON string. Example: {}
`total`	`integer`	optional	Returned when the number of records can be inferred by the backend; omitted when it cannot be inferred, and `null` is not returned. Example: {}
`costToken`	`integer`	optional	The token cost of this call; the free tool is `0`, and the paid tool is currently `16000`. Example: {}
`costTime`	`integer`	optional	The backend takes time in milliseconds. Example: {}

Examples

Example arguments

{
  "arguments": {
    "searchText": "Auriculares",
    "siteId": "MLM"
  },
  "toolName": "categorySearch"
}

Example structuredContent

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