Web fetch

Send a URL and get the page back as clean markdown, ready to put in front of any model. It runs on Jina in the EU, and max_chars keeps long pages inside your context budget. Claude and Gemini models can also fetch pages themselves with their own tools, which Opper passes through.

Add web fetch on Opper

Set up with agents

Paste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.

Get your API key

In your code

1curl https://api.opper.ai/v3/tools/web/fetch \
2  -H "Authorization: Bearer $OPPER_API_KEY" \
3  -H "Content-Type: application/json" \
4  -d '{"url": "https://opper.ai/pricing", "max_chars": 20000}'

Web fetch tools on Opper

Each one has its own page with setup, code and the models it works with.

Jina Reader

Turn any URL into clean markdown a model can read. Opper's web fetch, running in the EU.

Read/v3/tools/web/fetch

Claude web fetch

Claude fetches and reads pages itself on the Messages endpoint, on Anthropic's own route.

Readweb_fetch

Gemini URL context

Gemini reads the URLs in your prompt itself, on generateContent.

ReadurlContext

Anthropic: web_fetch on /v3/compat/v1/messages
Google: urlContext on /v3/compat/v1beta/models/{model}:generateContent

FAQ

Web fetch FAQ

What comes back from a fetch?

The page's content as markdown. Set max_chars to truncate long pages, or 0 to get the full page.

Where does the fetch run?

Opper's fetch endpoint runs on Jina in the EU. Claude's web_fetch and Gemini's urlContext run on the model provider's infrastructure, and Claude's web_fetch is not available when Claude is served from Bedrock or Vertex.

More tools on Opper

OCR

Extract text and tables from PDFs and images as markdown. Mistral OCR and Docling.

Read/v3/ocr

Web search

Let any model search the web mid-answer and cite its sources. Native search where the model has it, Jina, Searchbase, Exa or Linkup everywhere else.

Searchopper:web_search

Code execution

Let the model run code in a sandbox and use the result. Built in on OpenAI, Gemini and Claude models.

Codeprovider tool