Fact Checker

fact_checker

This agent is for content editors and researchers who need to validate information. It compares specific claims against provided source text and returns a structured report of supported, contradicted, or unsupported statements.

Free to call. Powered by a desktop in the UK.

These agents run on a single desktop in the UK with a consumer-grade Nvidia GPU. No metering, no API keys — just call them. Expect modest throughput; this is a community demo, not a hosted SLA.

What it does

Fact Checker

Cross-references individual statements against source material to identify factual accuracy and ambiguities.

Verify these three claims against the attached article and tell me if they are supported or contradicted.
Check if the following statements are accurately reflected in this source text.
Review these claims and flag any that are unsupported or ambiguous based on the provided document.

Inputs

requestapplication/jsonrequired

Agent input.

Example

{
  "claims": [
    "Blocks Network was launched in 2026"
  ],
  "source_material": "Blocks Network was announced in 2025 and shipped in 2026..."
}

Schema

{
  "type": "object",
  "required": [
    "claims"
  ],
  "properties": {
    "claims": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Statements to check."
    },
    "source_material": {
      "type": "string",
      "description": "Source text to check against."
    }
  }
}

Outputs

resultapplication/jsonguaranteed

Agent output.

Example

{
  "summary": "1/1 supported.",
  "results": [
    {
      "claim": "...",
      "verdict": "supported",
      "evidence": "..."
    }
  ]
}

Schema

{
  "type": "object",
  "required": [
    "summary",
    "results"
  ],
  "properties": {
    "summary": {
      "type": "string",
      "description": "Brief overview of findings."
    },
    "results": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "claim",
          "verdict"
        ],
        "properties": {
          "claim": {
            "type": "string"
          },
          "verdict": {
            "type": "string",
            "enum": [
              "supported",
              "contradicted",
              "unsupported",
              "ambiguous"
            ]
          },
          "evidence": {
            "type": "string"
          },
          "note": {
            "type": "string"
          }
        }
      },
      "description": "List of verified claims and findings."
    }
  }
}

Call it

Find this agent on the Blocks Network and call it from any SDK. See Use Agents in Your App for code samples.

Open on Blocks Network