claimgate

endpoint

https://claimgate.onrender.com/mcp

protocol

streamable-http ·2025-06-18

authentication

none observed

public key

none — nobody has proven they own this listing · is it yours? claim it

karma

0 · newcomer

Is claimgate live?

Yes — it answered the hub's last check (checked 58m ago). It answered 100% of checks over the last 30 days.

Is claimgate free to use?

Yes — the hub reached it with no key and no payment.

What tools does claimgate have?

5 tools: fact_check_receipt, fact_check_claim, fact_check_preview, fact_check_methodology, fact_check_status.

Is claimgate safe to connect?

The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

• fact_check_methodology open 58m ago

  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.

  mcp-tool

  12345

  {
    "type": "object",
    "properties": {},
    "additionalProperties": false
  }

  arguments 5 lines copy
• fact_check_status open 58m ago

  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.

  mcp-tool

  12345

  {
    "type": "object",
    "properties": {},
    "additionalProperties": false
  }

  arguments 5 lines copy
• fact_check_receipt unknown never probed

  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).

  mcp-tool

  123456789101112131415

  {
    "type": "object",
    "required": [
      "receipt_id"
    ],
    "properties": {
      "receipt_id": {
        "type": "string",
        "maxLength": 128,
        "minLength": 4,
        "description": "Receipt id returned by fact_check_claim, e.g. cg_..._........"
      }
    },
    "additionalProperties": false
  }

  arguments 15 lines copy
• fact_check_claim unknown never probed

  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.

  mcp-tool

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  {
    "type": "object",
    "required": [
      "claim"
    ],
    "properties": {
      "claim": {
        "type": "string",
        "maxLength": 2000,
        "minLength": 10,
        "description": "The claim to fact-check, as a single statement or a short paragraph."
      },
      "sources": {
        "type": "array",
        "items": {
          "type": "string",
          "maxLength": 2048
        },
        "maxItems": 8,
        "description": "Optional public HTTPS source URLs to check against (max 8). When omitted or fewer than 2 are usable, ClaimGate searches the live web."
      },
      "sub_claims": {
        "type": "array",
        "items": {
          "type": "string",
          "maxLength": 2000,
          "minLength": 8
        },
        "maxItems": 4,
        "description": "Optional caller-provided decomposition of the claim into sub-claims (max 4). When omitted, the claim text is split into sentences."
      }
    },
    "additionalProperties": false
  }

  arguments 34 lines copy
• fact_check_preview unknown 58m ago

  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.

  mcp-tool

  123456789101112131415161718192021222324

  {
    "type": "object",
    "required": [
      "claim"
    ],
    "properties": {
      "claim": {
        "type": "string",
        "maxLength": 2000,
        "minLength": 10,
        "description": "The claim to fact-check, as a single statement or a short paragraph."
      },
      "sources": {
        "type": "array",
        "items": {
          "type": "string",
          "maxLength": 2048
        },
        "maxItems": 8,
        "description": "Optional public HTTPS source URLs to check against (max 8). When omitted or fewer than 2 are usable, ClaimGate searches the live web."
      }
    },
    "additionalProperties": false
  }

  arguments 24 lines copy

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.