SCRIPTMASTERLABS — ClaimGate

com.scriptmasterlabsPublished by scriptmasterlabs.comv1.0.1Updated Nov 5, 2026

Fact-check claims against live web sources: verbatim evidence, coherence-gated verdict.

The publisher's own server: SCRIPTMASTERLABS — B20 Truth

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingKnowledge & Memory

Overview

AI-generated overview

ClaimGate fact-checks claims against live web sources, returning coherence-gated verdicts backed by verbatim quotes and sealed receipts.

What you can do
  • Preview a claim for free: decompose it into sub-claims, fetch and classify sources, group them into independent families
  • Run a paid fact check that adds jury votes, per-source verdicts and a final coherence-gated verdict
  • Inspect the public methodology: coherence formula, source-class weights, verdict thresholds and stated limits
  • Check service status: whether the jury is configured, which payment facilitator is selected, stored receipt count and price
  • Retrieve a stored receipt by ID with sub-claims, sources, verdicts, quotes and payment record
When to use it
Useful when an assistant needs to verify a factual claim before relying on it or passing it on, and when you want a documented, auditable verdict rather than a free-form opinion. The free preview is a reasonable first step to see what a paid check would cover.
Requirements
Remote streamable HTTP endpoint; no package or local runtime. No authentication, environment variables or headers are declared. Paid checks require payment in USDC on Base or Arc, USDC on Solana, XRP on XRPL, or XAH on Xahau, so a compatible wallet and funds are needed. Network access to the endpoint and to live web sources.
Before you install
fact_check_claim costs $0.25 per call in cryptocurrency, so an assistant could spend funds without a clear budget or approval step. Payment goes through an x402 facilitator and claims are sent to third-party web sources. Verdicts are explicitly not calibrated, and a claim no source addresses stays UNVERIFIABLE. Start with the free preview and set spending limits.

Installation

In SourceWeft

  1. Open SCRIPTMASTERLABS — ClaimGate in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.scriptmasterlabs%2Fclaimgate/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "scriptmasterlabs-claimgate": {
      "type": "http",
      "url": "https://claimgate.onrender.com/mcp"
    }
  }
}

Tools

5

fact_check_claim

Fact Check Claim

PAID tool ($0.25 USDC via x402 — pay in USDC on Base, USDC on Arc, USDC on Solana, XRP on XRPL at the live spot rate, or XAH on Xahau at the live spot rate). 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 with five accepts: Base USDC amount 250000 = $0.25, Solana USDC amount 250000, XRPL XRP in drops at the live spot rate, Arc USDC amount 250000, and Xahau XAH in drops at the live spot rate, each to that rail 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.

Parametersclaimrequiredsourcessub_claims

fact_check_preview

Fact Check Preview

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.

Parametersclaimrequiredsources

fact_check_status

Fact Check Status

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.

Takes no parameters.

fact_check_methodology

Fact Check Methodology

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.

Takes no parameters.

fact_check_receipt

Fact Check Receipt

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).

Parametersreceipt_idrequired

Version history

2
  1. v1.0.1LatestNov 5, 2026
  2. v1.0.0Nov 1, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.

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