{"x402Version":2,"name":"SML ClaimGate","provider":{"name":"Script Master Labs LLC","url":"https://scriptmasterlabs.com"},"enabled":true,"network":"eip155:8453","asset":"USDC","assetAddress":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","description":"Fact-check a claim against live web sources: verbatim-quote evidence, coherence-gated verdict, sealed receipt. Public MCP server; the paid fact check is coherence-gated and every verdict is sealed as an auditable receipt.","transport":"MCP streamable HTTP (JSON-RPC 2.0, POST)","mcp":"https://claimgate.onrender.com/mcp","llms":"https://claimgate.onrender.com/llms.txt","payment":{"scheme":"exact","challengeHeader":"PAYMENT-REQUIRED","requestHeader":"PAYMENT-SIGNATURE","responseHeader":"PAYMENT-RESPONSE","payTo":"0xc29185fa176357612f3194735753e520e91adc46","facilitator":"payai"},"resources":[{"method":"POST","url":"https://claimgate.onrender.com/mcp","tool":"fact_check_claim","title":"Fact Check Claim","priceUsd":"0.25","description":"PAID tool ($0.25 USDC via x402, Base). Fact-check a claim against live web sources: the claim is decomposed into sub-claims, sources are fetched live, Jev jurors judge per-source-family entailment with verbatim-quote evidence that must pass an anti-hallucination substring gate, and the verdict is coherence-gated (coherence = |sum(w*d)| / sum(w) over source families, weights 3/2/1 by source class) and sealed as a stored receipt. Send the x402 PAYMENT-SIGNATURE header on the /mcp request; without payment the call returns the canonical x402 challenge (HTTP 402, amount 250000 = $0.25 USDC, payTo of the canonical SML receiver). If the jury is not configured the call fails before any payment is requested, so nobody pays for a check that cannot run.","call":{"jsonrpc":"2.0","method":"tools/call","params":{"name":"fact_check_claim"}}},{"method":"POST","url":"https://claimgate.onrender.com/fact-check","tool":null,"title":"Fact Check Claim (HTTP)","priceUsd":"0.25","description":"Plain-HTTP twin of fact_check_claim: POST {claim, sources?, sub_claims?} with an x402 PAYMENT-SIGNATURE header; returns the sealed receipt JSON with a PAYMENT-RESPONSE header.","call":{"method":"POST","path":"/fact-check","body":{"claim":"ScriptMasterLabs' Verdict Protocol charges $0.25 per decision on Base.","sources":["https://scriptmasterlabs.com/verdict-protocol"]}}}],"free_tools":[{"name":"fact_check_preview","title":"Fact Check Preview","description":"Free preview: decompose a claim into sub-claims, fetch the sources live (or search for them), classify each source and group sources into independent families, and show exactly what a paid fact_check_claim would check. No verdict, no jury calls, no payment."},{"name":"fact_check_status","title":"Fact Check Status","description":"Check whether ClaimGate is live, whether the Jev jury is configured, which x402 facilitator is selected, how many receipts are stored, and the paid-check price."},{"name":"fact_check_methodology","title":"Fact Check Methodology","description":"The full public ClaimGate methodology: coherence formula, source-class weights, verdict thresholds, the anti-hallucination verbatim-quote gate, family independence rules, and honest limits. calibrated:false — thresholds are stated, not fitted."},{"name":"fact_check_receipt","title":"Fact Check Receipt","description":"Fetch a stored ClaimGate receipt by receipt_id (the sealed record of a paid fact check: sub-claims, sources, per-family verdicts with validated verbatim quotes, coherence, verdict, and payment)."}]}