# Fact-check a claim against the evidence. Web, news, research and the original source A fact-check traces a claim to its origin and weighs the evidence for and against it. With Agentik, your AI searches the web with Exa and the news with Serper, checks background facts on Wikipedia and research on OpenAlex, and finds archived copies of the original source in the Wayback Machine. - For: Journalists, editors, researchers and anyone checking a claim - Providers: 5 (Exa, Serper, Wikipedia, OpenAlex and Internet Archive), 5 tools - Example (One claim, one Exa search, one news search, one Wikipedia search, one OpenAlex search, 2 archive lookups): at most $0.07, computed from the live catalog - Updated: 2026-10-10 ## Each provider does one part No single provider covers this job. Through Agentik your AI calls each one for its part, from one connection and one prepaid balance. - **Exa** (1 tool, at most $0.06): Web pages about the claim, found by meaning, with their text. - **Serper** (1 tool, at most $0.01): News coverage of the claim. - **Wikipedia** (1 tool, free): Background facts on the people, places and numbers involved. - **OpenAlex** (1 tool, free): Research papers on the topic. - **Internet Archive** (1 tool, free): Archived copies of the original source. ## Give this to your agent ```text Use my connected Agentik MCP server for this job: fact-check a claim. Fact-check a claim. First ask me for the exact claim and where I saw it. Search the web for its origin and evidence with exa/search. Search the news with serper/news. Check background facts with wikipedia/search. Look for research on it with openalex/search-works. Find the original source’s archived copy with wayback/availability, in case it changed or disappeared. Finish with a verdict (true, mostly true, misleading, false or unproven), the evidence for and against with links, where the claim started, and what is still uncertain. Before running anything, inspect each tool with inspect_tool, ask me for any input you don’t have instead of inventing it, and tell me the total price. Wait for my go. At the end, tell me what Agentik charged. ``` ## You provide - The exact claim - Where you saw it ## What you get: a verdict with evidence for and against - A verdict with its reasoning - Evidence for and against, with links - Where the claim started - What is still uncertain ## How to fact-check a claim in Claude or ChatGPT Prices are the most each call can reserve for this example: One claim, one Exa search, one news search, one Wikipedia search, one OpenAlex search, 2 archive lookups. ### 1. Find the origin and evidence Exa searches the web for the claim’s origin and evidence, with the pages’ text, and Serper searches the news. - [Exa web search](/tools/exa/search.md) `exa/search` (Exa, 10 pages): at most $0.06 - [Google News search](/tools/serper/news.md) `serper/news` (Serper, 1 search): at most $0.01 ### 2. Check facts and research Wikipedia checks background facts, and OpenAlex finds research on the topic. - [Wikipedia search](/tools/wikipedia/search.md) `wikipedia/search` (Wikipedia, 1 search): free - [Scholarly works search](/tools/openalex/search-works.md) `openalex/search-works` (OpenAlex, 10 works): free ### 3. Find the original source The Wayback Machine finds archived copies of the original source, in case it changed or disappeared. - [Wayback Machine snapshot lookup](/tools/wayback/availability.md) `wayback/availability` (Internet Archive, 2 pages): free ### 4. Write the verdict Your AI writes a verdict with the evidence for and against, where the claim started and what is still uncertain. Example total: at most $0.07. Each call is billed for measured usage; unused reservations are released. ## Ask it your way - Is it true that 10,000 steps a day halves heart disease risk? - Where did this statistic come from, and is it accurate? - Has this article changed since it was first published? - Find the original study behind this headline. ## Why through Agentik - Web, news, Wikipedia, research and archives come from five providers through one connection. - Wikipedia, OpenAlex and the archive are free; a check costs a few cents. ## Good to know - Your AI separates what the sources say from its own reading. - A claim with no evidence either way is unproven, not false. ## When to use something else For professional fact-checking with editorial review, rely on a fact-checking organisation. This playbook gathers the evidence fast so you can judge. ## Fact-check a claim: questions ### Does it decide for me? It gives a verdict with its reasoning and separates what the sources say from its own reading. ### What if there is no evidence either way? The claim is unproven, not false, and the verdict says so. ### What does the example cost? At most $0.07, reserved before each call and settled at the measured usage. ## Keep going - [Verify a viral photo](/verify-viral-media.md): A viral image traced to its earliest copies by reverse image search and X’s full archive, its old pages in the Internet Archive, and the weather on the claimed day and place. - [Literature review](/literature-review.md): The most cited and most recent papers on a question from OpenAlex and Crossref, research found by meaning with Exa, and background from Wikipedia, in a review with citations. - [Expert finder](/expert-finder.md): Researchers and practitioners who published or spoke recently on your topic, their papers and podcast appearances, their X profiles and emails. - [Research tools for your agent](/tools/research.md) - [Knowledge tools for your agent](/tools/knowledge.md) - [News tools for your agent](/tools/news.md) [All playbooks](/playbooks.md) · [Connection guides](/docs/clients.md) · [Billing](/docs/billing.md) --- [HTML page](/fact-check) · [Agent index](/llms.txt)