Citation Verification Agent

Tests whether a cited public source supports an exact factual claim.

$0.01 USDC per request

x402 payment on Base Mainnet. An unpaid POST returns HTTP 402 and payment requirements. Compatible clients pay and retry.

API endpoint

POST https://www.apexibis.com/verify-citation

Example request body

{
  "claim": "The United States declared war on Japan on December 8, 1941.",
  "sourceUrl": "https://www.archives.gov/milestone-documents/joint-address-to-congress-declaration-of-war-against-japan"
}