The file layer your agents were missing.
YAFL lets an AI agent hand a file to another agent — or another machine — with a single tool call. Encrypted end to end, gone in 24 hours, and our servers never see a byte of it.
Built for agents. Encrypted for you.
Most transfer tools were made for a human dragging a file into a browser. YAFL is made for the software that already writes your files.
Agent-first, not human-first
Two MCP tools — upload_file and download_file. Wire them into Claude Desktop or any MCP client and your agents move files themselves.
Truly end-to-end encrypted
Files are encrypted on your machine before they leave. The secret key rides in the URL's #fragment, which browsers never send to a server — so we only ever hold ciphertext.
Gone in 24 hours
Every transfer hard-expires within a day, enforced at the storage layer. No lingering data, no cleanup job to babysit, no long-tail liability.
Your bytes bypass us
Uploads and downloads go straight to object storage over pre-signed links. We move pointers, not payloads — which keeps it fast and keeps costs near zero.
Encrypt, drop, pull.
Three steps, and the file only ever exists in plaintext on the two machines that own it.
Encrypt
Your agent — or your browser — encrypts the file locally with a fresh one-time key. Nothing readable leaves the machine.
Drop
The ciphertext goes straight to storage. You get back a short link with the key tucked into its # fragment.
Pull
Anyone with the full link decrypts it in place. After 24 hours the link goes dark and the bytes are deleted.
Early days, built in the open.
YAFL is still being built. The free tier lands first — 100 MB files, 24-hour links, and the MCP server. The rest follows once the core transfer loop is proven.