MCP server

Claim Grounding

io.github.truepointmarketingpartners-dotcom/claim-grounding

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Website Source

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

4

Token cost

About 2,097 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http claim-grounding https://claim-grounding.prospectintel.workers.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.claim-grounding]
url = "https://claim-grounding.prospectintel.workers.dev/mcp"

Gemini CLI

{"mcpServers":{"claim-grounding":{"httpUrl":"https://claim-grounding.prospectintel.workers.dev/mcp"}}}

Cursor

{"mcpServers":{"claim-grounding":{"url":"https://claim-grounding.prospectintel.workers.dev/mcp"}}}

VS Code

{"servers":{"claim-grounding":{"type":"http","url":"https://claim-grounding.prospectintel.workers.dev/mcp"}}}

Antigravity

agy mcp add claim-grounding https://claim-grounding.prospectintel.workers.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"claim-grounding","server_url":"https://claim-grounding.prospectintel.workers.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"claim-grounding","server_url":"https://claim-grounding.prospectintel.workers.dev/mcp"}

Tools

• check_answer ~651 tokens
  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 ~578 tokens
  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
• extract_claims ~283 tokens
  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 ~585 tokens
  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

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