Search & Trend Intelligence

SEO Keyword Expansion

Deduplicated suggestions and related keywords with source relationships. Calls are idempotent by user, slug and UUID key. Free owner-only result retrieval: GET /api/skill-api/v1/skills/seo-keyword-expand/calls/{callId} or nexscope_seo_call_result. Successful results remain available in owner call history. Seven-day source-freshness rules apply only to dependent requests. Missing values are not zero. Examples describe structure only and are not measured results.

MCP tool name

nexscope_seo_keyword_expand

Legacy MCP endpoint

/api/skill-api/v1/mcp

JSON-RPC method

tools/call

Authentication

Send the user API key as a bearer token on every MCP JSON-RPC request.

Authorization: Bearer nk-xxxxxxxxxxxxxxxxx

If authentication is missing or invalid, ask the user to open API Access and copy a valid key before calling this tool.

Call this MCP tool

Use tools/call with the MCP tool name below. The arguments object should match the table on this page.

{
  "jsonrpc": "2.0",
  "id": "seo-keyword-expand-1",
  "method": "tools/call",
  "params": {
    "name": "nexscope_seo_keyword_expand",
    "arguments": {
      "language": "en",
      "market": "US",
      "keyword": "hiking bottle"
    }
  }
}

Legacy endpoint

POST /api/skill-api/v1/mcp

Canonical detail URL

https://www.nexscope.ai/mcp-map/seo-keyword-expand

Response fields

Treat structuredContent as the programmatic API response payload.

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`	`any`	required	Data value used by this API operation.

One of option 1 — requires callId, status, result

Name	Type	Required	Description
`data`	`object`	required	Data value used by this API operation.
`data.callId`	`string`	required	Call id value used by this API operation.
`data.schemaVersion`	`string`	optional	Schema version value used by this API operation.

Examples

Example arguments

{
  "language": "en",
  "market": "US",
  "keyword": "hiking bottle"
}

Example structuredContent

{
  "data": {
    "retryable": false,
    "status": "PROCESSING",
    "callId": "00000000-0000-4000-8000-000000000001",
    "reason": "IN_PROGRESS"
  },
  "code": 0,
  "msg": null,
  "ts": "0",
  "time": "2026-01-01 00:00:00",
  "cost": "-1",
  "traceId": null
}

Any of option 1

Name	Type	Required	Description
`data.result`	`object`	required	Result value used by this API operation.
`data.result.seed`	`string \| null`	optional	Seed value used by this API operation.
`data.result.market`	`string \| null`	optional	Market value used by this API operation.
`data.result.language`	`string \| null`	optional	Language value used by this API operation.
`data.result.requestedLimit`	`integer \| null`	optional	Requested limit value used by this API operation.
`data.result.returnedCount`	`integer \| null`	optional	Returned count value used by this API operation.
`data.result.items`	`array`	optional	Items value used by this API operation.
`data.result.items[]`	`object`	required	Item in data result items.
`data.result.items[].keyword`	`string \| null`	optional	Keyword value used by this API operation.
`data.result.items[].relations`	`array`	optional	Relations value used by this API operation.
`data.result.items[].relations[]`	`object`	required	Item in data result items[] relations.
`data.result.items[].relations[].source`	`string \| null`	optional	Source value used by this API operation.
`data.result.items[].relations[].seed`	`string \| null`	optional	Seed value used by this API operation.
`data.result.items[].relations[].depth`	`integer \| null`	optional	Depth value used by this API operation.
`data.result.items[].searchVolume`	`integer \| null`	optional	Search volume value used by this API operation.
`data.result.items[].keywordDifficulty`	`number \| null`	optional	Keyword difficulty value used by this API operation.
`data.result.items[].missing`	`array`	optional	Missing value used by this API operation.
`data.result.items[].missing[]`	`object`	required	Item in data result items[] missing.
`data.result.items[].missing[].field`	`string \| null`	optional	Field value used by this API operation.
`data.result.items[].missing[].reason`	`string \| null`	optional	Reason value used by this API operation.
`data.result.sources`	`array`	optional	Sources value used by this API operation.
`data.result.sources[]`	`object`	required	Item in data result sources.
`data.result.sources[].source`	`string \| null`	optional	Source value used by this API operation.
`data.result.sources[].status`	`string \| null`	optional	Status value used by this API operation.
`data.result.sources[].returnedCount`	`integer \| null`	optional	Returned count value used by this API operation.
`data.result.sources[].missingReason`	`string \| null`	optional	Missing reason value used by this API operation.

Any of option 2

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

One of option 2 — requires callId, status, reason, retryable

Name	Type	Required	Description
`data`	`object`	required	Data value used by this API operation.
`data.reason`	`string`	required	Reason value used by this API operation.
`data.taskId`	`string \| null`	optional	Task id value used by this API operation.
`data.retryable`	`boolean`	required	Retryable value used by this API operation.
`data.status`	`string`	required	Status value used by this API operation.
`data.callId`	`string \| null`	required	Call id value used by this API operation.

SEO Keyword Expansion

SEO Keyword Expansion

Authentication

Call this MCP tool

Arguments

Response fields

Any of option 1

One of option 1 — requires callId, status, result

Examples

Example arguments

Example structuredContent

Related MCP tools

Any of option 1

Any of option 2

One of option 2 — requires callId, status, reason, retryable

Any of option 2