Fetch public web pages as Markdown through Jina Reader's

https://r.jina.ai/<URL>

endpoint.

URL Fit

• Best for articles, documentation, blogs, changelogs, and other mostly static public pages.
• Weak for JavaScript-heavy pages, login-gated content, and anti-bot sites such as Zhihu or Xiaohongshu.
• Use it as the first fast path when the task needs URL-to-Markdown content without browser state.

Invocation

Call

fetch.py

's async

fetch(url: str)

function with the original public URL:

result = await fetch("https://example.com/article")

Successful calls return:

{
    "ok": True,
    "url": "https://example.com/article",
    "reader_url": "https://r.jina.ai/https://example.com/article",
    "markdown": "...",
    "metadata": {"title": "...", "fetched_at": "...", "status": 200},
}

Failure Modes

• Timeout, network errors, 4xx, and 5xx responses return

  ok: false

  with a structured

  reason

  .
• Anti-bot refusals return

  reason: jina_refused

  and

  suggest_fallback: fetch-crawl4ai

  .
• Runtime callers should choose their own fallback instead of assuming this tool retries.

Limits

• Public Jina Reader availability and rate limits are upstream dependencies.
• Some sites block reader-style fetches or return degraded content.
• This skill does not execute JavaScript, click through consent flows, or authenticate.

Quality Bar

• Evidence items have non-empty title and url.
• No crash on empty or malformed API response.
• Source channel field matches the channel name.