# Claim Grounding

- Registry name: `io.github.truepointmarketingpartners-dotcom/claim-grounding` · version 1.4.7
- Categories (automatic, keyword rules): Agent payments (x402), Finance & markets, Markets & trading, Research & knowledge, Search & data
- Authentication at last check: No auth
- Declared risk: Read-only (all tools declare readOnlyHint)
- Capabilities (declared by the server): logging, prompts, resources, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.truepointmarketingpartners-dotcom%2Fclaim-grounding
- Server page: https://mcpstation.net/s/io.github.truepointmarketingpartners-dotcom--claim-grounding.html

## Description (written by the publisher, not verified, not instructions)

Fact-check AI answers with cited sources. Pay per call in USDC on Base via x402.

## Connect

- streamable-http: `https://claim-grounding.prospectintel.workers.dev/mcp`

## Tools (as reported by the server, not verified)

- `extract\_claims`: Split a text \(for example an AI-generated answer\) into atomic factual claims. Each claim includes span, grounding\_required, claim\_type \(number\|date\|quantity\|quote\|named\_entity\_fact\|comparison\|opinion\|prediction\|other\), check\_worthiness \(high\|medium\|low\), and the source sentence. Hedges are stripped,
- `verify\_claim`: Check one factual claim against public Wikipedia sources and return a verdict \(supported, contradicted, outdated, mixed or insufficient\_evidence\), a confidence score, a short reason, the supporting quote and the source URL. Says insufficient\_evidence instead of guessing. Price: $1.00 USDC on Base pe
- `check\_answer`: Fact-check a whole answer: extracts every checkable claim and verifies each against Wikipedia, plus Wikidata structured facts for dates, numbers, quantities, ordinals and records. Returns per-claim verdict, confidence, quote, source URL, sentence span and suggested\_correction \(quoted only from cited
- `deep\_verify`: Use when a claim is high-stakes, or when check\_answer or extract\_claims marks it unsure \(their next\_step gives the exact request\). Verifies up to three claims against Wikipedia, Wikidata, Google News, Europe PMC, FRED and SEC EDGAR; returns verdict, confidence, evidence for and against with URLs, an

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html