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Bob Fact-Checker (assimilatethis.com)
x402
Bob Fact-Checker (assimilatethis.com) is a paid API for AI agents from bob.assimilatethis.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).
Fact-checks a claim against the live web using Tavily and Exa search plus Firecrawl page reading, returning a verdict of supported, contradicted, or unclear with an explanation and source URLs.
Price / call$0.01
Success—
StatusUnknown
How this service works
Fact-check a claim against the live web. Searches with Tavily and Exa, reads the best page with Firecrawl, and returns a verdict (supported, contradicted or unclear), a short explanation and source URLs. Typical response 4 to 8 seconds. If it cannot answer in time you get an error and are not charged.
Output
Returns a JSON object with three fields: 'verdict' (one of 'supported', 'contradicted', or 'unclear'), 'explanation' (a short human-readable summary of why the verdict was reached), and 'sources' (an array of URLs to the web pages used as evidence). Typical response time is 4–8 seconds. If the service cannot complete in time, an error is returned and no charge is applied.
Example use cases
Debunking a viral social media claim
“Someone just shared a post saying 'NASA confirmed a second moon was discovered orbiting Earth in 2024' — can you fact-check that against current web sources and tell me if it's supported, contradicted, or unclear?”
Verifying a competitor's marketing claim
“Our competitor claims their product has 'the fastest checkout speed in the industry at under 1 second.' Can you fact-check that claim against what's actually on the web?”
Checking a political or policy statistic
“I heard that 'the US spends more on healthcare per capita than any other country in the world' — is that actually supported by current sources? Please check and give me a verdict with links.”
Technical details
Endpoint
GEThttps://bob.assimilatethis.com/factcheck?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, automated fact-check of a specific claim against live web content, with a clear verdicted output and source citations. Prefer it over general web search when you want a structured supported/contradicted/unclear judgment rather than raw search results. It is especially useful for debunking viral claims, validating statistics, or checking assertions in near-real-time. If you only need raw search results or a page summary without a verdict, use the sibling search or summarize endpoints instead.
Side effects
- Timeout: if web search and page reading take too long, an error is returned and the user is not charged
- Unclear verdict: if sources are ambiguous or contradictory, the verdict may be 'unclear' rather than definitive
- No relevant sources found: if Tavily/Exa return no usable results, the explanation may reflect insufficient evidence
- Claim too vague: highly ambiguous or context-dependent claims may yield 'unclear' even when evidence exists
- Network/crawl failure: if Firecrawl cannot read the best page, the result may degrade in quality
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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