AI Developer Tools

YAFL

An agent-first file transfer tool that enables secure, encrypted file sharing between AI agents via MCP calls without human involvement.

What is YAFL?

YAFL is a secure file transfer layer designed for AI agents, allowing them to exchange files using MCP commands with end-to-end encryption and automatic expiration.

YAFL vs Similar AI Tools

Pricing ModelFree, FreemiumFreeFreeFree
Free Credits
Key Features
  • End-to-end encryption with AES-256-GCM
  • Agent-to-agent file transfer over MCP
  • File uploads up to 100 MB
  • Seven breakable boxes covering OWASP Agentic Top-10 vulnerabilities
  • Three guided simulations for cascading failures, human-agent trust, and rogue agents
  • Network-isolated Docker containers for safe execution
  • Code-to-runtime reasoning across cloud, Git, and Kubernetes
  • Action-gate enforces read-only policy on every API call
  • Sandboxed JavaScript execution for concurrent research
  • Append-only, SHA-256-addressed event history through Jaybase
  • AES-256-GCM encryption for stored node payloads
  • Unified RBAC for ledger, notes, snapshots, and audit reads
Pros
  • End-to-end encryption
  • No server-side plaintext
  • Covers full OWASP Agentic Top-10 in a realistic manner
  • Docker isolation prevents accidental damage
  • Read-only by construction prevents accidental writes
  • Evidence-backed verification cross-checks every finding
  • Opinionated and secure accounting CLI with immutable audit trail
  • Designed for AI agent integration with JSON output
Cons
  • Limited to 100 MB on free tier
  • Links expire after 24 hours (may be too short for some)
  • Requires Docker and technical setup
  • Not for production use; only for lab environments
  • Requires an LLM API key, incurring token costs
  • Limited to read-only operations, cannot remediate
  • Pre-1.0, limited feature set
  • No native QuickBooks import (agents must normalize data)
Best For
  • AI agent developers
  • DevOps teams automating file transfers between agents
  • Security researchers focusing on AI agent vulnerabilities
  • Developers building MCP-based applications
  • Security engineers
  • DevOps teams
  • Small teams needing secure, auditable accounting with AI agent support
  • Developers integrating automated bookkeeping workflows

How to use YAFL?

  1. 1Install the MCP server via npx: npx @yafldev/mcp
  2. 2Configure your AI agent's MCP host with the provided JSON.
  3. 3Call upload_file from your local agent to upload a file and get a short link.
  4. 4Pass the link to another agent (or human) who calls download_file to retrieve and decrypt the file.

YAFL Key Features

  • End-to-end encryption with AES-256-GCM
  • Agent-to-agent file transfer over MCP
  • File uploads up to 100 MB
  • Links expire after 24 hours
  • No plaintext storage on server
  • API key per agent with easy revocation

YAFL Use Cases

  • AI agent handoff of files between environments
  • Securely transferring logs, outputs, or artifacts between agents
  • Replacing SSH/scp for agent-based workflows

YAFL Pricing & Free Credits

YAFL currently operates on a Free, Freemium model.

Free TierFree Credits

Free Tier

$0

100 MB, 24h links, MCP and browser upload/download

Paid Plans

Paid Tier (Coming Soon)

TBD

Larger files, custom expiry, audit logs

Free Tier

$0

100 MB, 24h links, MCP and browser upload/download

Paid Tier (Coming Soon)

TBD

Larger files, custom expiry, audit logs

YAFL Pros & Cons

Pros

  • End-to-end encryption
  • No server-side plaintext
  • Simple MCP integration for agents
  • Automatic expiration and cleanup

Cons

  • Limited to 100 MB on free tier
  • Links expire after 24 hours (may be too short for some)
  • Still in early stage, paid features not yet available

What is YAFL best for?

  • AI agent developers
  • DevOps teams automating file transfers between agents
  • Anyone needing secure agent-to-agent file handoff

YAFL FAQ

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