{"x402Versions":[1,2],"service":"groundcheck","description":"Verification layer for agentic commerce — claim grounding, citation attestation, and signed delivery receipts that bind an x402 payment to what the paid service actually delivered. Free single-claim grounding; machine-payable document attestation, claim extraction, and third-party delivery verification, every answer offline-verifiable.","tags":["enrichment","grounding","citations","attested","machine-verified","verified-data","research","agent-tools","claim-verification","delivery-verification","delivery-receipts","agentic-commerce","payment-accountability"],"payTo":"0x5B4A78b7EFe482d1579E287dA6F0043f89cf0EA1","network":{"name":"base","caip2":"eip155:8453"},"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","freePerDay":3,"resources":[{"path":"/attest-delivery","method":"POST","priceUSD":0.05,"accepts":[{"scheme":"exact","network":"eip155:8453","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","amount":"50000","payTo":"0x5B4A78b7EFe482d1579E287dA6F0043f89cf0EA1","maxTimeoutSeconds":60,"extra":{"name":"USD Coin","version":"2"}}]},{"path":"/check","method":"POST","priceUSD":0.02,"accepts":[{"scheme":"exact","network":"eip155:8453","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","amount":"20000","payTo":"0x5B4A78b7EFe482d1579E287dA6F0043f89cf0EA1","maxTimeoutSeconds":60,"extra":{"name":"USD Coin","version":"2"}}]},{"path":"/extract","method":"POST","priceUSD":0.005,"accepts":[{"scheme":"exact","network":"eip155:8453","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","amount":"5000","payTo":"0x5B4A78b7EFe482d1579E287dA6F0043f89cf0EA1","maxTimeoutSeconds":60,"extra":{"name":"USD Coin","version":"2"}}]},{"path":"/resolve","method":"POST","priceUSD":0.005,"accepts":[{"scheme":"exact","network":"eip155:8453","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","amount":"5000","payTo":"0x5B4A78b7EFe482d1579E287dA6F0043f89cf0EA1","maxTimeoutSeconds":60,"extra":{"name":"USD Coin","version":"2"}}]}],"alwaysFree":["/verify","/search","/health"]}