SourceCheck News Fact Verification

Use this endpoint when you need to programmatically verify whether factual claims in a draft news article are backed by provided source documents, especially in automated publishing pipelines or editorial workflows where human fact-checking is being augmented by AI. Prefer this over general LLM fact-checking when you have explicit source texts you want the claims measured against.

• Missing article text or source documents returns an error
• Sources insufficient to verify claims results in inconclusive response
• Malformed A2A message payload causes request failure
• Payment of 0.16 USDC not provided results in 402 Payment Required
• Source texts too short or irrelevant to article topic yields low-confidence results