Backlink profile summary

You are wiring up the agntdata "SEO" API to use this endpoint: Backlink profile summary.

1. CONNECT over MCP (preferred). Add the superagnt MCP server, then let the client
   run OAuth on first tool call — no token to paste:
     claude mcp add --scope user --transport http superagnt https://mcp.superagnt.com/mcp
     claude mcp login superagnt
   MCP endpoint: https://mcp.superagnt.com/mcp
   After connecting, the tool you want is named exactly:
     data_seo_backlinks_summary
   Call agnt_tools_search or agnt_tools_list_enabled to confirm it is available.

2. REST fallback (if you are not using MCP):
     POST https://api.agntdata.dev/backlinks-summary
     Header: Authorization: Bearer <YOUR_AGNTDATA_API_KEY>
   Required parameters:
    - target (string, required) — Domain, subdomain or full page URL. Domains without protocol; pages with protocol.
   Optional parameters:
    - include_subdomains (boolean, optional) — Count links to subdomains too. Default true.
    - exclude_internal_backlinks (boolean, optional) — Ignore links from the target to itself. Default true.

3. COST & KEY. This endpoint is priced per call in credits, and each successful response reports its own cost in its meta.costCents field. Only successful calls are charged.
   Get an agntdata API key at https://app.agntdata.dev.

4. TEST. Connect the server (or set the key), discover the tool
   (data_seo_backlinks_summary), run one minimal call with just the required parameters,
   and report back the shape of the JSON response (top-level fields).

Reference (machine-readable variant): https://superagnt.com/docs/apis/seo/endpoints/backlinks_summary.md

{
  "name": "backlinks_summary",
  "description": "Returns a domain or page's backlink profile at a glance: total backlinks, referring domains, domain rank, spam score, broken links, and anchor/TLD distributions (flat object at result[0], no items array). The `rank` here is the target domain's own backlink-authority rank — a different metric from the per-referring-domain `rank` in backlink_gap/referring_domains rows, so the same domain can carry different numbers in each. Use it to qualify a site's authority in one cheap call before deeper link analysis.",
  "parameters": {
    "type": "object",
    "properties": {
      "target": {
        "type": "string",
        "description": "Domain, subdomain or full page URL. Domains without protocol; pages with protocol."
      },
      "include_subdomains": {
        "type": "boolean",
        "default": true,
        "description": "Count links to subdomains too. Default true."
      },
      "exclude_internal_backlinks": {
        "type": "boolean",
        "default": true,
        "description": "Ignore links from the target to itself. Default true."
      }
    },
    "required": [
      "target"
    ]
  }
}