Claude、Cursor、その他のMCPクライアント向けのWebページリーダーMCPサーバー

import os

import httpx
from mcp.server.fastmcp import FastMCP

API = "https://webreaderapi.com/api/v1/read"
KEY = os.environ["WEBREADER_API_KEY"]
mcp = FastMCP("webreaderapi")


@mcp.tool()
def read_url(url: str, max_chars: int = 20000) -> str:
    """Read a public web page and return its main content as Markdown.

    Use it when the user gives a link or when a page must be read to answer.
    max_chars caps the length of the returned text (1,000 to 500,000).
    """
    params = {"url": url, "max_chars": max(1000, min(int(max_chars), 500000))}
    try:
        resp = httpx.get(API, params=params, headers={"Authorization": "Bearer " + KEY}, timeout=75)
    except httpx.HTTPError as exc:
        return "Network error while reading the page: " + str(exc)
    body = resp.json()
    if resp.status_code != 200:
        err = body.get("error", {})
        return "Could not read the page: " + err.get("code", str(resp.status_code)) + ". " + err.get("message", "")
    title = body.get("title") or url
    return "# " + title + "\nSource: " + body.get("final_url", url) + "\n\n" + body.get("markdown", "")


if __name__ == "__main__":
    mcp.run()

python -m venv .venv
. .venv/bin/activate
pip install "mcp[cli]" httpx
WEBREADER_API_KEY="your-key" python webreader_mcp.py

{
  "mcpServers": {
    "webreaderapi": {
      "command": "/home/you/webreader/.venv/bin/python",
      "args": ["/home/you/webreader/webreader_mcp.py"],
      "env": { "WEBREADER_API_KEY": "your-key" }
    }
  }
}