{"system":"GENESIS*","exists":true,"service":"sha256_checksum","summary":"Compute SHA-256 checksum and hash","description":"Compute a deterministic SHA-256 checksum, cryptographic hash, digest, or fingerprint for text or structured data. Useful for payload integrity verification, content fingerprints, deduplication, audit records, cache keys, signatures, and machine-to-machine verification.","execution":{"method":"POST","endpoint":"https://genesis.palsus2023.workers.dev/v1/sha256_checksum","paymentRequired":true,"free":false,"price":"$0.001","protocol":"x402","network":"eip155:8453","currency":"USDC"},"discovery":{"service":"https://genesis.palsus2023.workers.dev/v1/sha256_checksum","catalog":"https://genesis.palsus2023.workers.dev/catalog","services":"https://genesis.palsus2023.workers.dev/services","openapi":"https://genesis.palsus2023.workers.dev/openapi.json","x402":"https://genesis.palsus2023.workers.dev/.well-known/x402","health":"https://genesis.palsus2023.workers.dev/health"},"instructions":"GET returns free service metadata. POST executes the service and requires x402 payment."}