File checksum API: fetch any public file URL (up to 50MB) and return its SHA-256/SHA-512/SHA-1/MD5 hex digest — verify a download matches its published checksum BEFORE trusting it. Supply-chain safety for agents installing packages, models, and binaries. File is hashed in memory and discarded.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.005000 USDC | 0x8503...9432 |