AI is confident.
You should be too.
Let Resur reassure you.
Fact verification for professionals who can’t be wrong.
Resur is an MCP server—it works wherever you already use AI
Models & assistants
- ChatGPT
- Claude
- Gemini
- Perplexity
Coding tools & IDEs
- Antigravity
- Claude Code
- Codex
- Cursor
- Gemini CLI
- GitHub Copilot
- VS Code
- Windsurf
How it works
Every claim, traced to a source, and verified.
Resur reads what an AI wrote, breaks it into individual claims, and traces each one back to an authoritative source—labeling it verified, unverified, or contradicted, with the evidence shown. The check runs independently of the model that produced the text; Resur never asks an AI to grade its own work.
The input—what the AI said
“Nvidia became the first company to reach a $1 trillion market capitalization, crossing the mark in May 2023. It was founded in 1993, and its CEO Jensen Huang holds a master’s degree in electrical engineering from Stanford University.”
- Break into claims
- Search sources
- Judge evidence
- Verdict
1Nvidia was the first company to reach a $1 trillion market capitalization.
Meaning verifiedContradicted“Apple has hit the $1 trillion mark, becoming the first publicly traded company in the U.S. to reach 13 figures in terms of market value.”
More detail
- Source
- cbsnews.com · Apple becomes the first $1 trillion U.S. company
- Method
- Meaning verified
- Date
- 2018-08-02
- Why
- Apple was the first U.S. company to reach $1 trillion, on August 2, 2018—nearly five years before Nvidia—so Nvidia was not the first to that milestone.
2Nvidia crossed the $1 trillion market-cap mark in May 2023.
Meaning verifiedVerified“Nvidia is the latest company whose market capitalization crossed the $1 trillion mark, as its stock jumped more than 4% in early trading Tuesday, before losing a little ground.”
More detail
- Source
- fortune.com · Nvidia’s market cap tops $1 trillion
- Method
- Meaning verified
- Date
- 2023-05-30
- Why
- Fortune reported Nvidia’s market capitalization crossing $1 trillion on May 30, 2023—within May 2023 as claimed.
3Nvidia was founded in 1993.
Meaning verifiedVerified“Headquartered in Santa Clara, California, NVIDIA was incorporated in California in April 1993 and reincorporated in Delaware in April 1998.”
More detail
- Source
- sec.gov · NVIDIA Corporation Form 10-K (Item 1, Business)
- Method
- Meaning verified
- Date
- 2026-02-25
- Why
- NVIDIA’s own SEC 10-K states the company was incorporated in California in April 1993—the founding year the claim asserts.
4Jensen Huang holds a master’s degree in electrical engineering from Stanford University.
Meaning verifiedVerified“Born in Taiwan, Jensen Huang studied at Oregon State University before receiving his master’s degree in electrical engineering at Stanford in 1992.”
More detail
- Source
- engineering.stanford.edu · Jensen Huang (Stanford Engineering Heroes)
- Method
- Meaning verified
- Date
- 2018
- Why
- Stanford Engineering’s own site states Huang received his master’s in electrical engineering at Stanford (in 1992)—the degree the claim asserts.
Illustrative example. Facts shown are real and were verified against the sources linked above.
What Resur does
Claim
One factual statement, pulled from the AI’s answer.
Authoritative source
Resur finds where that fact really lives.
Check
The claim is matched against the evidence.
Verdict + evidence
Verified, unverified, or contradicted—shown.
A verdict with evidence, not a score
Every claim is labeled verified, unverified, or contradicted, with the exact source it was checked against and a link straight to the record. No matching source, no “verified.”
Catches hallucinations
When a claim has no authoritative backing, Resur says so—instead of letting a confident-sounding assertion pass unchecked.
Source-quality aware
Resur weighs whether a claim is verified, requiring primary and authoritative sources over low-quality ones—and keeps looking when the first source is weak.
Runs where you work
One MCP connector adds verification to any MCP-supporting AI client, right where you’re working.
Who it's for
Built for work where a wrong fact has a cost.
Lawyers
Since Mata v. Avianca, a fabricated citation means sanctions—Resur flags a case with no real source before it reaches the brief.
Consultants
One wrong number in a client deck can cost the engagement—Resur checks every figure against an authoritative source first.
Financial analysts
Analysts and bankers build pitch and client decks where every figure has to be right—Resur verifies the numbers against primary sources before you present.
Researchers & academics
A citation has to actually exist and say what you claim—Resur traces each one back to the source it cites.
Journalists & fact-checkers
A deadline is no excuse for an error—Resur checks each claim against authoritative reporting and records.
Healthcare & life sciences
A misread study or wrong figure carries real consequences—Resur verifies each fact against the primary literature.
Pricing
Simple pricing.
Free
20 verifications / month—no card required.
Get early access- Per-claim verdicts with evidence, inside Claude
- Source-quality–aware verification
- Every source shown—cited by you or found by Resur
Professional
Most popular- Everything in Free
- Generous monthly verification credits
- Usage dashboard, history, and API keys
- Pay-as-you-go after your monthly credits
Firm
For teams and firms—volume credits, shared billing, and seat management.
Get early access- Everything in Professional
- Single sign-on (SAML / SSO)
- Centralized admin & billing
- Pooled credits, seat & credit management
- Priority support
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Questions