{"method":"POST","priceUsd":0.001,"network":"eip155:8453","description":"Compute SHA256 hash or SHA-512, SHA-1 and MD5 checksums for UTF-8 text and return hex plus Base64 digests. Use for SHA256 hashing, checksum verification, integrity checks, content fingerprints, cache keys, deduplication and agent pipelines.","example":{"text":"hello world","algo":"sha256"}}