exhibit402-mcp

Description

Pay with x402 (USDC on Base) to certify what a URL serves right now, and to re-verify existing certificates. **certify_url** ($1.00 fullpage / $0.50 viewport): two independent observers capture the URL at one frozen timestamp. Matching captures are tier CERTIFIED, differing ones are WITNESSED with a pixel-agreement percent and diff map. Evidence is stored permanently on Arweave and an ERC-721 certificate is minted on Base to the paying wallet. **verify_certificate** ($0.02): re-verifies any exhibit402 certificate by token id, Arweave manifest tx id, or job id, recomputing hashes from the actual stored bytes against the manifest and the on-chain record. Requires a wallet holding USDC on Base (chain eip155:8453); payment settles via EIP-3009 so the wallet needs no ETH for gas.

Community Metrics

Categories

• mcp

Tags

• mcp
• smithery

Capabilities

• local

Information