"Understanding File Structures" matching MCP connectors:

Zero-install remote MCP server for proof-of-existence file attestation.

Privacy-preserving file proofs on Solana. Files are hashed locally. Currently free, no API key.

Keyless x402 compliance on Base: $0.001 OFAC wallet screen, $0.05 pack, $0.95 company file.

Proof primitive for AI agents on MultiversX. Anchor file hashes on-chain as verifiable proofs.