Groundcheck

[
  {
    "error": "payment required (call with POST)",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x5B4A78b7EFe482d1579E287dA6F0043f89cf0EA1",
        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://groundcheck.seiche.info/check",
      "tags": [
        "enrichment",
        "grounding",
        "citations",
        "verified-data",
        "agent-tools"
      ],
      "iconUrl": "https://groundcheck.seiche.info/favicon.ico",
      "mimeType": "application/json",
      "description": "Claim grounding and citation attestation for AI agents: verified enrichment that adds a veracity field to text. Each factual claim is grounded against live web sources (Wikipedia + world news) and returned with a machine-verified verdict (supported/refuted/unverified), a confidence score, and cited sources. Refuses to guess on conflicting evidence. Built for research agents that must cite, citation-locked content, and compliance checks.",
      "serviceName": "Groundcheck"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "text": "The Eiffel Tower was completed in 1889. It is 330 metres tall.",
              "max_claims": 8
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "report": [
                {
                  "claim": "The Eiffel Tower was completed in 1889.",
                  "verdict": "supported",
                  "rationale": "sources support and none refute",
                  "confidence": 0.83
                }
              ],
              "backend": "wikipedia+gdelt",
              "checked": 2,
              "classifier": "free-llm-router"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "text"
          ],
          "properties": {
            "text": {
              "type": "string",
              "minLength": 1,
              "description": "Document whose factual claims to verify"
            },
            "max_claims": {
              "type": "integer",
              "maximum": 20,
              "minimum": 1
            }
          }
        },
        "routeTemplate": "/check"
      }
    },
    "x402Version": 2
  }
]