Metrics for specific keywords

You are wiring up the agntdata "SEO" API to use this endpoint: Metrics for specific keywords.

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_keyword_overview
   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/keyword-overview
     Header: Authorization: Bearer <YOUR_AGNTDATA_API_KEY>
   Required parameters:
    - keywords (array, required) — The exact keywords to look up (1-700). Cost scales with the number of keywords.
   Optional parameters:
    - location_code (integer, optional) — Geo target as a location code. Default 2840 (United States).
    - language_code (string, optional) — Two-letter language code. Default 'en'.

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_keyword_overview), 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/keyword_overview.md

{
  "name": "keyword_overview",
  "description": "Returns full metrics for the exact keywords you pass: search volume, CPC and competition (keyword_info), keyword difficulty (keyword_properties.keyword_difficulty), trend history and SERP characteristics. Use this when you already know the keywords and need their numbers; use keyword_ideas when you need to discover keywords.",
  "parameters": {
    "type": "object",
    "properties": {
      "keywords": {
        "type": "array",
        "items": {
          "type": "string"
        },
        "maxItems": 700,
        "description": "The exact keywords to look up (1-700). Cost scales with the number of keywords."
      },
      "location_code": {
        "type": "integer",
        "description": "Geo target as a location code. Default 2840 (United States).",
        "default": 2840
      },
      "language_code": {
        "type": "string",
        "description": "Two-letter language code. Default 'en'.",
        "default": "en"
      }
    },
    "required": [
      "keywords"
    ]
  }
}