Backlink Checker MCP: Referring Domains and Anchors

A backlink summary (rank, backlinks, referring domains, broken links, spam score) and the strongest backlinks with anchor text and follow status, plus referring domains and anchor text counts for any domain or URL.


Endpoint	`https://crakseo.com/mcp/backlinks`
Intended registry name	`com.crakseo/backlinks`
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 auditing a site’s link profile, vetting a link partner or comparing link profiles against competitors.

Connect

Claude Code

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

Use crakseo-backlinks as the server name and https://crakseo.com/mcp/backlinks 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
`check_backlinks`	Check backlinks	TBD (placeholder)
`get_referring_domains`	Referring domains	TBD (placeholder)
`get_backlink_anchors`	Backlink anchor texts	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.

`check_backlinks`

Check backlinks. Backlink checker: total backlinks, referring domains, domain rank, spam score and the strongest backlinks (one per domain) for any domain or URL. 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
`target`	`string`	Yes	Domain (example.com) or full page URL (https://example.com/page) to analyze.
`limit`	`integer`	No	How many top backlinks to list, 1 to 100. Default `25`.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "check_backlinks",
    "arguments": {
      "target": "example.com",
      "limit": 1
    }
  }
}

{
  "result": {
    "target": "example.com",
    "summary": {
      "rank": 0,
      "backlinks": 0,
      "referringDomains": 0,
      "referringMainDomains": 0,
      "brokenBacklinks": 0,
      "spamScore": 0
    },
    "backlinks": [
      {
        "from": "https://referrer.example/post",
        "to": "https://example.com/",
        "anchor": "example anchor",
        "dofollow": true,
        "domainRank": 0,
        "firstSeen": "2026-01-15"
      }
    ]
  },
  "billing": {
    "channel": "credits",
    "chargedMicros": 0,
    "chargedUsd": 0,
    "cacheHit": false,
    "balanceMicros": 0
  }
}

`get_referring_domains`

Referring domains. Referring domains: the domains linking to a domain or URL, with their rank, backlink count, spam score and first-seen date, strongest first. 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
`target`	`string`	Yes	Domain (example.com) or full page URL (https://example.com/page) to analyze.
`limit`	`integer`	No	How many referring domains to list, 1 to 500. Default `100`.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_referring_domains",
    "arguments": {
      "target": "example.com",
      "limit": 1
    }
  }
}

{
  "result": {
    "target": "example.com",
    "totalCount": 0,
    "domains": [
      {
        "domain": "referrer.example",
        "rank": 0,
        "backlinks": 0,
        "spamScore": 0,
        "firstSeen": "2026-01-15"
      }
    ]
  },
  "billing": {
    "channel": "credits",
    "chargedMicros": 0,
    "chargedUsd": 0,
    "cacheHit": false,
    "balanceMicros": 0
  }
}

`get_backlink_anchors`

Backlink anchor texts. Backlink anchor texts: the anchors used in links to a domain or URL, with backlink and referring-domain counts per anchor. 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
`target`	`string`	Yes	Domain (example.com) or full page URL (https://example.com/page) to analyze.
`limit`	`integer`	No	How many anchors to list, 1 to 500. Default `100`.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_backlink_anchors",
    "arguments": {
      "target": "example.com",
      "limit": 1
    }
  }
}

{
  "result": {
    "target": "example.com",
    "totalCount": 0,
    "anchors": [
      {
        "anchor": "example anchor",
        "backlinks": 0,
        "referringDomains": 0
      }
    ]
  },
  "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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Backlink Checker MCP: Referring Domains and Anchors

When to use

Connect

Verify without spending

Tools

`check_backlinks`

`get_referring_domains`

`get_backlink_anchors`

`get_api_credit_balance`

Errors

​When to use

​Connect

​Verify without spending

​Tools

​check_backlinks

​get_referring_domains

​get_backlink_anchors

​get_api_credit_balance

​Errors

When to use

Connect

Verify without spending

Tools

`check_backlinks`

`get_referring_domains`

`get_backlink_anchors`

`get_api_credit_balance`

Errors