Shared Organic Keyword Competitors

Find domains that rank for the same organic keywords as a target domain. Call it via REST API or MCP to automate SEO research in your app or AI agent.

CostRecent 20 credits / call

Try online

POST · https://api.nexscope.ai/seo/domainCompetitorsMCP · nexscope_seo_domain_competitors

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Competitors & Traffic

What this API does

Find domains that rank for the same organic keywords as a target domain. The request accepts language, limit, market, target. Its documented result includes inputTarget, averagePosition, domain, sharedKeywordCount, language, market, maximumRankGroup, ordering.

Shared Organic Keyword Competitors API use cases

Compare competitor visibility

To compare competitor visibility, a search marketer submits language and limit to Shared Organic Keyword Competitors. The returned inputTarget, averagePosition, domain help identify websites competing for relevant search visibility.

Identify pages for further research

A search marketer uses Shared Organic Keyword Competitors with language and limit to identify pages for further research. The returned inputTarget, averagePosition, domain help shortlist pages or queries for a deeper comparison.

Prepare a website performance review

For this workflow, a search marketer calls Shared Organic Keyword Competitors with language and limit to prepare a website performance review. The result helps assemble evidence for a website performance discussion.

Shared Organic Keyword Competitors API FAQ

What does the Shared Organic Keyword Competitors API return?

Find domains that rank for the same organic keywords as a target domain. The documented output includes inputTarget, averagePosition, domain, sharedKeywordCount, language, market, maximumRankGroup, ordering. It corresponds to the supplied language, limit, market, target. Optional fields can be absent; a missing value should not be interpreted as a measured zero. Example values illustrate the response shape, rather than live account results.

How many credits does the Shared Organic Keyword Competitors API cost?

The current documented cost is Recent 20 credits / call. This is the same cost shown at the top of this page. If a range or estimate is displayed, the final charge depends on the request. Review your available credits and the pricing page before calling the API, and check API usage records for the actual charge.

How do I call the Shared Organic Keyword Competitors API from my app or an MCP client?

Send a POST request to https://api.nexscope.ai/seo/domainCompetitors with your API key as a Bearer token and the JSON inputs shown in API integration. In a compatible MCP client such as Claude or Cursor, connect Nexscope and call nexscope_seo_domain_competitors. Use the MCP arguments shown in the MCP guide, or switch Online test to MCP to review its request before adding it to your app.

View plans and credits Connect this API with MCP

Try this API

Endpoint

https://api.nexscope.ai/seo/domainCompetitors

MCP method

nexscope_seo_domain_competitors

Step 1 of 3 · Authenticate

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 .

Step 2 of 3 · Send a request

POSThttps://api.nexscope.ai/seo/domainCompetitors

Run an API

Send a JSON request body using the parameters described below.

Example request

Replace YOUR_API_KEY, then run this command in your terminal.

curl -X POST 'https://api.nexscope.ai/seo/domainCompetitors' \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "language": "en",
  "limit": 10,
  "market": "US",
  "target": "nexscope.ai"
}'

Step 3 of 3 · Inspect the result

Check the response

Read code for the request status and data for the result. Open the parameter and response reference for the full field definitions.

HTTP status codes

Code	Description
200	Default HTTP response for both success and many business errors. Only outer JSON code 0 indicates success or asynchronous acceptance; inspect data for the result.
429	Execution admission rate limit; honor Retry-After when present.
503	Execution admission is temporarily unavailable; honor Retry-After when present.
Opt-in	X-Nexscope-Http-Status: semantic maps controller-handled business errors to HTTP status on run and task routes. Pre-authentication failures, such as a missing API key (code 11209), may still return HTTP 200 before this mapping. Always check the outer JSON code; malformed requests and infrastructure failures may also return non-200 HTTP responses.

View parameters & response Try online

All categories/ Competitors & Traffic

POSThttps://api.nexscope.ai/seo/domainCompetitors

Run this API

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

Open tester

Endpoint

Method	`POST`
Path	`https://api.nexscope.ai/seo/domainCompetitors`
Auth	`Bearer API key`
Content-Type	`application/json`

Request parameters

Name	Type	Required	Description
`language`	`string`	optional	Language value used by this API operation. Constant: en Default: en
`limit`	`integer`	optional	Limit value used by this API operation. Default: 10 Minimum: 1 Maximum: 20
`market`	`string`	optional	Market value used by this API operation. Constant: US Default: US
`target`	`string`	required	Target value used by this API operation. Minimum length: 1 Maximum length: 254

Code example

{
  "language": "en",
  "limit": 10,
  "market": "US",
  "target": "nexscope.ai"
}

Response example

Example response envelope from the documented SEO API contract.

{
  "code": 0,
  "cost": "-1",
  "data": {
    "callId": "synthetic-call",
    "completedAt": null,
    "coverage": {
      "missing": [
        {
          "field": "synthetic",
          "reason": "UPSTREAM_FIELD_MISSING"
        }
      ],
      "status": "PARTIAL"
    },
    "requestedAt": "123",
    "result": {
      "inputTarget": "synthetic",
      "items": [
        {
          "averagePosition": 1.25,
          "domain": "synthetic",
          "missing": [
            {
              "field": "synthetic",
              "reason": "synthetic"
            }
          ],
          "sharedKeywordCount": 9007199254740992
        }
      ],
      "language": "synthetic",
      "market": "synthetic",
      "maximumRankGroup": 1,
      "missing": [
        {
          "field": "synthetic",
          "reason": "synthetic"
        }
      ],
      "ordering": "synthetic",
      "requestedLimit": 1,
      "returnedCount": 1,
      "searchType": "synthetic",
      "target": "synthetic"
    },
    "schemaVersion": "synthetic",
    "source": "synthetic",
    "status": "PARTIAL",
    "usage": {
      "billingStatus": "UNAPPROVED",
      "chargedCredits": "0"
    }
  },
  "msg": null,
  "time": "2026-01-01 00:00:00",
  "traceId": "synthetic-trace",
  "ts": "9007199254740993"
}

Response fields

Name	Type	Required	Description
`code`	`integer`	required	0 is a successful envelope; inspect data.status separately. Allowed: 0, 42008, 42009
`cost`	`string`	required	Elapsed processing milliseconds; not price. -1 for non-web context.
`data`	`object`	required	Data value used by this API operation.
`data.callId`	`string \| null`	optional	Call id value used by this API operation.
`data.completedAt`	`string \| integer \| null`	optional	Completed at value used by this API operation.
`data.coverage`	`object`	optional	Coverage value used by this API operation.
`data.coverage.missing`	`array`	optional	Missing value used by this API operation.
`data.coverage.missing[]`	`object`	required	Item in data coverage missing.
`data.coverage.missing[].field`	`string`	optional	Field value used by this API operation.
`data.coverage.missing[].reason`	`string`	optional	Reason value used by this API operation.
`data.coverage.status`	`string`	optional	Status value used by this API operation.
`data.requestedAt`	`string \| integer \| null`	optional	Requested at value used by this API operation.
`data.result`	`object \| null`	required	Result value used by this API operation.
`data.result.inputTarget`	`string`	required	Input target value used by this API operation.
`data.result.items`	`array`	required	Items value used by this API operation. Minimum items: 0 Maximum items: 20
`data.result.items[]`	`object`	required	Item in data result items.
`data.result.items[].averagePosition`	`number \| null`	required	Average position value used by this API operation. Minimum: 0
`data.result.items[].domain`	`string`	required	Domain value used by this API operation. Minimum length: 1
`data.result.items[].missing`	`array`	required	Missing value used by this API operation. Minimum items: 0
`data.result.items[].missing[]`	`object`	required	Item in data result items[] missing.
`data.result.items[].missing[].field`	`string`	required	Field value used by this API operation.
`data.result.items[].missing[].reason`	`string`	required	Reason value used by this API operation. Allowed: UPSTREAM_FIELD_MISSING, UPSTREAM_FIELD_INVALID, DUPLICATE_UPSTREAM_ITEM
`data.result.items[].sharedKeywordCount`	`integer \| null`	required	Shared keyword count value used by this API operation. Minimum: 0
`data.result.language`	`string`	required	Language value used by this API operation. Constant: en
`data.result.market`	`string`	required	Market value used by this API operation. Constant: US
`data.result.maximumRankGroup`	`integer`	required	Maximum rank group value used by this API operation. Constant: 100
`data.result.missing`	`array`	required	Missing value used by this API operation. Minimum items: 0
`data.result.missing[]`	`object`	required	Item in data result missing.
`data.result.missing[].field`	`string`	required	Field value used by this API operation.
`data.result.missing[].reason`	`string`	required	Reason value used by this API operation. Allowed: UPSTREAM_FIELD_MISSING, UPSTREAM_FIELD_INVALID, DUPLICATE_UPSTREAM_ITEM
`data.result.ordering`	`string`	required	Ordering value used by this API operation. Constant: target_intersection_organic_count_desc
`data.result.requestedLimit`	`integer`	required	Requested limit value used by this API operation. Minimum: 1 Maximum: 20
`data.result.returnedCount`	`integer`	required	Returned count value used by this API operation. Minimum: 0 Maximum: 20
`data.result.searchType`	`string`	required	Search type value used by this API operation. Constant: organic
`data.result.target`	`string`	required	Target value used by this API operation.
`data.schemaVersion`	`string \| null`	optional	Schema version value used by this API operation.
`data.source`	`string \| null`	optional	Source value used by this API operation.
`data.status`	`string`	optional	Status value used by this API operation. Allowed: SUCCESS, PARTIAL, EMPTY, PROCESSING, UNKNOWN, FAILED
`data.usage`	`object \| null`	optional	Usage value used by this API operation.
`data.usage.billingStatus`	`string \| null`	optional	Billing status value used by this API operation.
`data.usage.chargedCredits`	`string \| integer \| null`	optional	Charged credits value used by this API operation.
`msg`	`string \| null`	required	Available upstream msg/errmsg/message is preferred for success and failure; Chinese is translated to English. Missing successful message is null. Platform-only errors and task states use platform English. Message text never determines success or retry.
`time`	`string`	required	yyyy-MM-dd HH:mm:ss
`traceId`	`string \| null`	required	Trace id value used by this API operation.
`ts`	`string`	required	Epoch milliseconds; global long serializer.

Accepted processing response

code 0 confirms acceptance. Use data.callId to query the same request; processing is not completion.

Name	Type	Required	Description
`code`	`integer`	required	0 is a successful envelope; inspect data.status separately. Constant: 0
`cost`	`string`	required	Elapsed processing milliseconds; not price. -1 for non-web context.
`data`	`object`	required	Data value used by this API operation.
`data.callId`	`string \| null`	required	Call id value used by this API operation.
`data.reason`	`string`	required	Reason value used by this API operation. Constant: IN_PROGRESS
`data.retryable`	`boolean`	optional	Retryable value used by this API operation.
`data.status`	`string`	required	Status value used by this API operation. Constant: PROCESSING
`data.taskId`	`string \| null`	optional	Task id value used by this API operation.
`msg`	`string \| null`	required	Available upstream msg/errmsg/message is preferred for success and failure; Chinese is translated to English. Missing successful message is null. Platform-only errors and task states use platform English. Message text never determines success or retry.
`time`	`string`	required	yyyy-MM-dd HH:mm:ss
`traceId`	`string \| null`	required	Trace id value used by this API operation.
`ts`	`string`	required	Epoch milliseconds; global long serializer.

Error response

Name	Type	Required	Description
`code`	`integer`	required	0 is a successful envelope; inspect data.status separately.
`cost`	`string`	required	Elapsed processing milliseconds; not price. -1 for non-web context.
`data`	`object`	required	Data value used by this API operation.
`data.callId`	`string \| null`	required	Call id value used by this API operation.
`data.reason`	`string \| null`	required	Reason value used by this API operation.
`data.retryable`	`boolean`	optional	Retryable value used by this API operation.
`data.status`	`string \| null`	required	Status value used by this API operation.
`data.taskId`	`string \| null`	optional	Task id value used by this API operation.
`msg`	`string \| null`	required	Available upstream msg/errmsg/message is preferred for success and failure; Chinese is translated to English. Missing successful message is null. Platform-only errors and task states use platform English. Message text never determines success or retry.
`time`	`string`	required	yyyy-MM-dd HH:mm:ss
`traceId`	`string \| null`	required	Trace id value used by this API operation.
`ts`	`string`	required	Epoch milliseconds; global long serializer.

Retrieve a processing result

A response with PROCESSING and a callId means the result is still being prepared. Use the result query below with the returned identifier. This lookup reads the stored result and does not spend credits.

curl -X GET https://api.nexscope.ai/seo/domainCompetitors/calls/{callId} \
  -H "Authorization: Bearer nk-xxxxxxxxxxxxxxxxx"

Responses

Code	Description
200	Default HTTP response for both success and many business errors. Only outer JSON code 0 indicates success or asynchronous acceptance; inspect data for the result.
429	Execution admission rate limit; honor Retry-After when present.
503	Execution admission is temporarily unavailable; honor Retry-After when present.
Opt-in	X-Nexscope-Http-Status: semantic maps controller-handled business errors to HTTP status on run and task routes. Pre-authentication failures, such as a missing API key (code 11209), may still return HTTP 200 before this mapping. Always check the outer JSON code; malformed requests and infrastructure failures may also return non-200 HTTP responses.

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.

Step 1 of 2 · Connect your MCP client

MCP

V2 recommended

Connect remote agents through the standard MCP 2025-11-25 Streamable HTTP endpoint. Use OAuth 2.1 Authorization Code with PKCE, or an API key for compatibility.

POST https://api.nexscope.ai/mcp
MCP-Protocol-Version: 2025-11-25
Content-Type: application/json

Authentication

OAuth clients request the mcp:tools scope. The endpoint's 401 response advertises protected-resource metadata for authorization discovery.

Step 2 of 2 · Call the tool

Call a tool

{
  "jsonrpc": "2.0",
  "id": "tool-call-1",
  "method": "tools/call",
  "params": {
    "name": "nexscope_seo_domain_competitors",
    "arguments": {
      "language": "en",
      "limit": 10,
      "market": "US",
      "target": "nexscope.ai"
    }
  }
}

Legacy MCP v1

Existing API-key clients can continue using the compatibility endpoint. New integrations should use MCP v2.

GET / POST /mcp/legacy

Online test

Execute the current API with your API key and JSON payload. Online tests use this site's configured API environment; the Endpoint and copyable examples use the public integration address.

Uses your signed-in Nexscope session

SEO API Lab

Shared Organic Keyword Competitors

Find domains that rank for the same organic keywords as a target domain. Call it via REST API or MCP to automate SEO research in your app or AI agent.

Live request

Estimated 19 credits / callAPI usage records

Language

Value sent as the “language” request parameter.

Limit

Value sent as the “limit” request parameter.

1–20

Market

Value sent as the “market” request parameter.

Target

Value sent as the “target” request parameter.

Up to 254 characters

Live calls may use Data credits.

Processing result

If a request is still processing, use the returned identifier to retrieve its stored result. The tester recognizes the identifier automatically, and result queries do not spend credits.

Live response

Results

Your live result will appear here.

Complete the request fields above and run the API. No sample response is substituted.

Test with an API key or MCP

Estimated 19 credits / callAPI usage records

Try it

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

Endpoint

/seo/domainCompetitors

Processing result endpoint

https://api.nexscope.ai/seo/domainCompetitors/calls/{resultId}

MCP method

nexscope_seo_domain_competitors

API key*

JSON payload*

cURL

curl -X POST \
  https://api.nexscope.ai/seo/domainCompetitors \
  -H "Authorization: Bearer nk-..." \
  -H "Content-Type: application/json" \
  -d '{ "language": "en", "limit": 10, "market": "US", "target": "nexscope.ai" }'

Response

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

Processing result

Use the identifier returned by Run request. The tester selects the correct result query automatically, and result queries do not spend credits.

Result identifier

Result response

No task result yet. Query the task to see the generated output here.

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