Server data from the Official MCP Registry
Verify claims with web evidence. Returns sources and verdict. x402 micropayment.
About
Verify claims with web evidence. Returns sources and verdict. x402 micropayment.
Remote endpoints: sse: https://fact-checker.api.klymax402.com/mcp
Security Report
Valid MCP server (1 strong, 0 medium validity signals). 5 known CVEs in dependencies Imported from the Official MCP Registry. Trust signals: trusted author (116/119 approved).
1 tool verified · Open access · 5 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Connect
Remote Plugin
No local installation needed. Your AI client connects to the remote endpoint directly.
Add this to your MCP configuration to connect:
{
"mcpServers": {
"io-github-br0ski777-fact-checker": {
"url": "https://fact-checker.api.klymax402.com/mcp"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
Fact Checker API
Fact-check claims by searching the web and returning relevant evidence snippets. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.
Quickstart -- MCP
Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):
{
"mcpServers": {
"fact-checker": {
"url": "https://fact-checker.api.klymax402.com/mcp"
}
}
}
Quickstart -- HTTP (x402)
curl -X POST "https://fact-checker.api.klymax402.com/api/check" \
-H "Content-Type: application/json" \
-d '{"claim":"..."}'
# -> 402 Payment Required, with an x402 payment challenge in the response body
Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.
Tools
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
research_check_fact | POST | /api/check | $0.012 | Fact-check a claim by searching for evidence online |
research_check_fact
Use this when you need to verify a factual claim, check if a statement is true, or find evidence supporting or contradicting a claim. Accepts a claim text and returns relevant web snippets, source URLs, and a confidence assessment. Do NOT use for general web scraping — use web_scrape_to_markdown instead. Do NOT use for SEO analysis — use seo_audit_page instead. Do NOT use for sentiment analysis — use sentiment_analyzer instead.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
claim | string | yes | The factual claim to verify (e.g., 'The Eiffel Tower is 330 meters tall') |
max_sources | number | no | Maximum number of sources to return (default: 5, max: 10) |
Example agent prompts
- "Verify a factual claim, check if a statement is true, or find evidence supporting or contradicting a claim"
Payment
- Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (
eip155:8453) - Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
Part of klymax402
100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
License
MIT
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