Jina Reader
Jina Reader (r.jina.ai) converts web pages to clean markdown. Use it as a fallback when WebFetch fails due to bot protection, Cloudflare, captchas, or other blocking.
When to Use
WebFetchreturns 403, 406, or other access-denied status codes- Response content is a Cloudflare challenge page, captcha, or "please enable JavaScript"
- Response body is empty or nonsensical despite a 200 status
- User explicitly requests Jina Reader
How to Use
Prepend https://r.jina.ai/ to the target URL:
https://r.jina.ai/https://example.com/page
Call this with WebFetch:
WebFetch url="https://r.jina.ai/https://example.com/page"
The response is the page content converted to clean markdown.
Headers
For better results, pass these headers via WebFetch:
Accept: text/markdown— ensures markdown outputX-No-Cache: true— bypass Jina's cache for fresh content
Limitations
- Jina Reader has rate limits on free usage
- Some pages with heavy JS rendering may still return incomplete content
- Very long pages may be truncated
Workflow
- Try
WebFetchwith the original URL first - If blocked, retry via
https://r.jina.ai/<original-url> - If Jina also fails, inform the user and suggest they open the page manually