Corroborate MCP server

Corroborate is a small helper that checks how widely and independently a news claim is being reported. You give it a claim, and it tells you whether many separate outlets are covering it or whether it is really just one story echoed everywhere. It is handy for anyone who reads or shares news and wants a quick, honest read on the coverage before trusting it.

What this MCP server does

You ask your AI something like whether a claim is being widely reported. Your AI passes the claim to this helper. The helper searches several public news engines at once, filters out articles that are not really about the claim, and groups near-identical headlines so that one wire story echoed by many outlets counts as one origin, not many. It then gives back a verdict, a confidence score from 0 to 1, and the list of sources it used. It also writes down its own caveats, like when a source engine was down or when it spotted heavy syndication.

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What you can do with it

• Check whether a news claim is independently reported or just one story echoed around
• Get a confidence score from 0 to 1 for how well a claim is corroborated
• See the list of sources behind a verdict, with outlet, domain, and date
• Spot when a story comes from a wire service like AP or Reuters
• Ask for raw source lists without a verdict when you want to judge yourself
• See honest notes about syndication, breaking-news cascades, or engine outages
• Filter sources by how many days back to look, up to 90

Try asking your AI

• “Is it true that NASA delayed the Artemis III landing? How independently is that being reported?”
• “Check how corroborated this claim is: Acme Corp acquires Widget Industries for 2 billion dollars”
• “Find recent sources about the Federal Reserve holding interest rates steady”
• “Give me a corroboration verdict and confidence score for this headline I just saw”

What it gives back to you

You get back a verdict word like CONFIRMED, SINGLE_SOURCE, or UNCORROBORATED, plus a number of independent sources and a confidence score between 0 and 1. It also lists the sources it found, each with headline, outlet, web address, and date. There is a notes field with honest caveats, and a coverage field that says full or degraded if a search engine was down. If you use the find_sources tool instead, you just get the source list with no verdict.

Before you start

Who it's for

Anyone who reads, writes, or shares news and wants a quick, honest read on how independently a claim is being reported, such as journalists, researchers, analysts, and curious office workers.