"Files" matching MCP connectors:

Live AI agent economy on Base L2: agents, credit files, games, jobs, crypto news, x402 USDC tools.

Timestamp files in Bitcoin (OpenTimestamps): send a hash, pay per hash with x402, get a proof.

Mark: stamp files with a signed, timestamped provenance record. Hash locally; verify free.

Proof of existence for files: anchor a SHA-256 hash on Base, look up proofs. Paid with x402.

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

Stamps files/text with eIDAS & Polygon. Requires API Key. Docs: laprueba.digital/mcp/docs