Keyword Research MCP: Search Volume, CPC, Keyword Difficulty

Monthly search volume, CPC, competition, keyword difficulty and intent for any keyword and country, keyword ideas from seed terms, and the keywords a competitor ranks for that you don’t.


Endpoint	`https://crakseo.com/mcp/keyword-research`
Intended registry name	`com.crakseo/keyword-research`
Transport	Streamable HTTP
Sign-in	OAuth, or an API key as a bearer token
Scopes	`seo-data:read`
Billing	Pay as you go (API credits)

When to use

Use when planning content, sizing demand for a niche or choosing which keywords to target.

Connect

Claude Code

claude mcp add --transport http crakseo-keyword-research https://crakseo.com/mcp/keyword-research

Use crakseo-keyword-research as the server name and https://crakseo.com/mcp/keyword-research as the URL. Run /mcp in Claude Code to authenticate. For OAuth, scoped API keys and a free test, follow Connect and test. Other clients: ChatGPT, Cursor, Codex, VS Code, Cline, Gemini CLI, Grok and Muse. A remote connection does not require a marketplace listing. Registry names are distribution identifiers, not a claim of directory approval.

Verify without spending

Use CrakSEO get_api_credit_balance to report my balance and dataCallsEnabled. Do not buy credits or make a paid call.

Tools

Tool	What it does	Price per call
`get_keyword_search_volume`	Keyword search volume, CPC and difficulty	TBD (placeholder)
`find_keyword_ideas`	Find keyword ideas	TBD (placeholder)
`get_keyword_difficulty`	Keyword difficulty	TBD (placeholder)
`find_competitor_keywords`	Find competitor keywords (keyword gap)	TBD (placeholder)
`get_api_credit_balance`	API credit balance	Free

Tool names, titles and parameters on this page match the server’s tools/list response, which stays authoritative. Example values are placeholders, not real measurements. Prices marked TBD are set at launch on API credits.

`get_keyword_search_volume`

Keyword search volume, CPC and difficulty. Keyword search volume, CPC and difficulty for up to 200 keywords in any country: monthly Google searches, cost per click, competition, keyword difficulty, intent and the last 12 months trend. Costs API credits per call.

Price per call: TBD (placeholder)
Annotations: read-only, idempotent
Limits: Results are cached for 24 hours. Failed calls are free.

Parameter	Type	Required	Description
`keywords`	`string[]`	Yes	Up to 200 keywords.
`country`	`string`	No	Two-letter country code of the search market, for example US, GB, DE or IN. Default `US`.
`language`	`string`	No	Language code of the search market, for example en, de or pt-BR. Default `en`.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_keyword_search_volume",
    "arguments": {
      "keywords": [
        "seo mcp"
      ],
      "country": "US"
    }
  }
}

{
  "result": {
    "keywords": [
      {
        "keyword": "seo mcp",
        "searchVolume": 0,
        "cpc": 0,
        "competition": 0,
        "keywordDifficulty": 0,
        "intent": "commercial",
        "trend": [
          {
            "month": "2026-09",
            "searchVolume": 0
          }
        ]
      }
    ]
  },
  "billing": {
    "channel": "credits",
    "chargedMicros": 0,
    "chargedUsd": 0,
    "cacheHit": false,
    "balanceMicros": 0
  }
}

`find_keyword_ideas`

Find keyword ideas. Keyword ideas: related keywords for up to 20 seed keywords with search volume, CPC, difficulty and intent, sorted by search volume. Costs API credits per call.

Price per call: TBD (placeholder)
Annotations: read-only, idempotent
Limits: Results are cached for 24 hours. Failed calls are free.

Parameter	Type	Required	Description
`seeds`	`string[]`	Yes	Up to 20 seed keywords that describe the topic.
`country`	`string`	No	Two-letter country code of the search market, for example US, GB, DE or IN. Default `US`.
`language`	`string`	No	Language code of the search market, for example en, de or pt-BR. Default `en`.
`limit`	`integer`	No	How many ideas to return, 10 to 500. Default `100`.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "find_keyword_ideas",
    "arguments": {
      "seeds": [
        "trail running shoes"
      ],
      "country": "US",
      "limit": 10
    }
  }
}

{
  "result": {
    "ideas": [
      {
        "keyword": "trail running shoes for women",
        "searchVolume": 0,
        "cpc": 0,
        "competition": 0,
        "keywordDifficulty": 0,
        "intent": "commercial"
      }
    ]
  },
  "billing": {
    "channel": "credits",
    "chargedMicros": 0,
    "chargedUsd": 0,
    "cacheHit": false,
    "balanceMicros": 0
  }
}

`get_keyword_difficulty`

Keyword difficulty. Keyword difficulty: how hard it is to rank organically in Google for up to 500 keywords, scored 0 to 100. Costs API credits per call.

Price per call: TBD (placeholder)
Annotations: read-only, idempotent
Limits: Results are cached for 24 hours. Failed calls are free.

Parameter	Type	Required	Description
`keywords`	`string[]`	Yes	Up to 500 keywords.
`country`	`string`	No	Two-letter country code of the search market, for example US, GB, DE or IN. Default `US`.
`language`	`string`	No	Language code of the search market, for example en, de or pt-BR. Default `en`.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_keyword_difficulty",
    "arguments": {
      "keywords": [
        "serp api"
      ],
      "country": "US"
    }
  }
}

{
  "result": {
    "keywords": [
      {
        "keyword": "serp api",
        "keywordDifficulty": 0
      }
    ]
  },
  "billing": {
    "channel": "credits",
    "chargedMicros": 0,
    "chargedUsd": 0,
    "cacheHit": false,
    "balanceMicros": 0
  }
}

`find_competitor_keywords`

Find competitor keywords (keyword gap). Competitor keywords: keywords a competitor domain ranks for in Google that your domain does not, with search volume, difficulty and the competitor’s position. Costs API credits per call.

Price per call: TBD (placeholder)
Annotations: read-only, idempotent
Limits: Results are cached for 24 hours. Failed calls are free.

Parameter	Type	Required	Description
`competitor`	`string`	Yes	Competitor domain, for example competitor.com.
`yourDomain`	`string`	Yes	Your domain, for example example.com.
`country`	`string`	No	Two-letter country code of the search market, for example US, GB, DE or IN. Default `US`.
`language`	`string`	No	Language code of the search market, for example en, de or pt-BR. Default `en`.
`limit`	`integer`	No	How many keywords to return, 10 to 1000. Default `100`.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "find_competitor_keywords",
    "arguments": {
      "competitor": "competitor.example",
      "yourDomain": "example.com",
      "limit": 10
    }
  }
}

{
  "result": {
    "competitor": "competitor.example",
    "yourDomain": "example.com",
    "keywords": [
      {
        "keyword": "example keyword",
        "searchVolume": 0,
        "keywordDifficulty": 0,
        "competitorPosition": 4,
        "competitorUrl": "https://competitor.example/page"
      }
    ]
  },
  "billing": {
    "channel": "credits",
    "chargedMicros": 0,
    "chargedUsd": 0,
    "cacheHit": false,
    "balanceMicros": 0
  }
}

`get_api_credit_balance`

API credit balance. API credit balance: prepaid credits left for SEO data calls, amount spent, whether spending is suspended, and the per-call pricing rule. Free; no supplier call.

Price per call: Free
Annotations: read-only, idempotent
Limits: Free; reads the wallet only.

Parameter	Type	Required	Description

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_api_credit_balance",
    "arguments": {}
  }
}

{
  "availableMicros": 0,
  "availableUsd": 0,
  "spentMicros": 0,
  "frozen": false,
  "dataCallsEnabled": true,
  "pricing": {
    "creditMarkup": 0,
    "minimumPerCallUsd": 0
  }
}

Errors

Code	Meaning	What to do
`insufficient_credits`	The API credits wallet can’t cover the call’s maximum price.	Add credits at https://crakseo.com/app/indexing/credits, then retry the same call. The failed call isn’t charged.
`forbidden`	The connection doesn’t have the scope this tool needs, for example `seo-data:read` or `console:write`.	Reconnect and grant the scope named in the message, or use an API key that has it.
`not_connected`	Google Search Console or Bing Webmaster Tools isn’t connected, or no connected property covers the URL.	Open the connect link in the message and sign in with the account that owns the property.
`invalid_input`	A parameter is missing or out of range.	Read the message, which names the field, fix the argument and retry.
`confirmation_required`	A paid indexing submission doesn’t have the account owner’s approval for this exact quote.	`submit_indexing_urls` returns `status: "needs_confirmation"` with a `confirmationUrl`. Send the owner there to approve, then retry with the same `quoteId` and `idempotencyKey`. The agent can’t approve spend.
`wallet_frozen`	API credit spending is suspended on this account after a refund or dispute.	Contact support@crakseo.com.
`budget_exceeded`	The account’s daily API credit spending limit, or the service’s daily data budget, is used up.	Retry tomorrow.
`disabled`	SEO data calls aren’t switched on for this deployment yet.	Use the free Search Console and URL indexing tools meanwhile. `get_api_credit_balance` reports `dataCallsEnabled`.
`supplier_unavailable`	The data supplier couldn’t be reached or is rate limiting.	Retry later. Failed data calls are free.
`supplier_unknown`	The data supplier didn’t answer in time or sent an unreadable response.	Retry later. Failed data calls are free.
`supplier_error`	The data supplier refused the request or returned no data.	Check the arguments (for example the location name) and retry. Failed data calls are free.

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Keyword Research MCP: Search Volume, CPC, Keyword Difficulty

When to use

Connect

Verify without spending

Tools

`get_keyword_search_volume`

`find_keyword_ideas`

`get_keyword_difficulty`

`find_competitor_keywords`

`get_api_credit_balance`

Errors

​When to use

​Connect

​Verify without spending

​Tools

​get_keyword_search_volume

​find_keyword_ideas

​get_keyword_difficulty

​find_competitor_keywords

​get_api_credit_balance

​Errors

When to use

Connect

Verify without spending

Tools

`get_keyword_search_volume`

`find_keyword_ideas`

`get_keyword_difficulty`

`find_competitor_keywords`

`get_api_credit_balance`

Errors