fact_check
Fact-check a statement using Jina AI's grounding engine
LABSCO SUMMARY
The three web primitives an agent keeps reaching for, without three separate integrations.
read_webpage and search_web are the daily pair, and the switches that decide whether output is usable — images, links, generated alt text, cache bypass — are exposed rather than assumed on your behalf. fact_check is the outlier: it takes a statement rather than a query, which makes it right for checking a claim you already have in hand and wrong for open-ended research.
What it is
A three-tool front end for Jina AI: page extraction, web search, and statement grounding.
What you get
- A URL turned into content shaped for a model, with links and images kept or dropped and generated alt text on request
- no_cache on the page read, for when you need the page as it stands right now rather than as it was
- Web search returning a chosen count of results in the return_format you ask for
- A statement checked against Jina's grounding engine, with deepdive for a longer pass
Requirements
JINA_API_KEY. All three tools call Jina's API, so the key is the only thing between the server and an answer — there is nothing local to install and nothing to configure per site.
Setup effort
One command plus a key — npx -y jina-ai-mcp-server, then supply credentials
USE CASES
01
Getting a documentation page into the conversation without the navigation
Read the URL into model-shaped content, keeping links when you intend to follow them and dropping images when they only cost tokens; bypass the cache when the page changed minutes ago.
02
Researching something released after the model was trained
Search for the handful of pages that matter, then read the two that look right in full — search gives you the addresses, the reader gives you the substance.
03
Checking a claim before you repeat it
Put the statement itself — not a search query — through the grounding engine, and turn on the deeper pass when the claim is the load-bearing one in what you are writing.
3 tools
Counted once with only startup setup. Other versions, modes or optional credentials may expose a different list.
read_webpage
Extract content from a webpage in a format optimized for LLMs
search_web
Search the web using Jina AI's search API
BEFORE YOU INSTALL
What to know first
Tools you get
3 tools when we connected.
Requires
- npx on PATH
- JINA_API_KEY in your environment
Where it runs
The documented client runs the server on your machine.
CONTEXT COST
Light Standing cost
Rated by the size of the 3 tool definitions that ride along on every turn, not by how many there are
INSTALLATION
Connect your client
Server setup
TERMINAL
npx -y jina-ai-mcp-serverMCP Clients
Claude Desktop
CLAUDE DESKTOP · JSON
{
"mcpServers": {
"jina-ai-mcp-server": {
"command": "npx",
"args": [
"-y",
"jina-ai-mcp-server"
],
"env": {
"JINA_API_KEY": "<YOUR_KEY>"
}
}
}
}
