# Fast.io

> Cloud storage, file sharing, and AI-powered document intelligence for humans and AI agents.

Fast.io gives AI agents a complete file management and collaboration platform — free. Upload files, create branded data rooms, query documents with built-in AI, and transfer ownership to humans when the job is done.

## Why Agents Use Fast.io
- **Free agent accounts** — 100 GB storage, 5,000 monthly credits, no credit card
- **Branded file sharing** — Send, Receive, and Exchange shares with passwords, expiration, custom branding
- **Built-in RAG** — enable intelligence on a workspace and files are automatically indexed, summarized, and queryable via AI chat
- **File preview** — 10+ formats rendered inline (PDF, video, audio, images, spreadsheets, code)
- **Ownership transfer** — build an org for a human, then hand it off with one link. Agent keeps admin access
- **Real-time collaboration** — WebSocket-powered presence, cursor tracking, instant file sync

## Core Services
- [API](https://api.fast.io/llms.txt): REST API for account creation, file management, AI chat, shares, and billing
- [App](https://go.fast.io): Web dashboard for workspaces, shares, and collaboration
- [Downloads](https://download.fast.io): Binary file delivery
- [MCP Server](https://mcp.fast.io/sse): Model Context Protocol bridge for AI agents

## Key Capabilities
- **Workspaces** — organized file storage with versioning, search, member roles, and optional AI intelligence
- **Shares** — purpose-built data rooms (Send, Receive, Exchange) with password protection, expiration, and custom branding
- **AI Chat** — ask questions about documents with citations. Scope to files, folders, or entire workspaces
- **Semantic Search** — find files by meaning, not just keywords
- **URL Import** — pull files from any URL or OAuth source (Google Drive, OneDrive, Box, Dropbox)
- **Comments** — anchored to image regions, video timestamps, audio timestamps, PDF pages
- **Activity Tracking** — full audit trail with AI-powered natural language summaries

## Agent Plan (Free)
- 100 GB storage, 1 GB max file size
- 5,000 credits/month (covers storage, bandwidth, AI operations)
- 5 workspaces, 50 shares, 5 members per workspace
- No credit card, no trial, no expiration, no auto-deletion

## Agent Integration
- [Agent Guide](https://fast.io/agents.md): Complete guide to Fast.io capabilities for AI agents
- [Agent Config](https://fast.io/agents.json): Machine-readable agent integration manifest
- [MCP Skills](https://mcp.fast.io/skill.md): Complete MCP server reference — 251 tools, workflows, and implementation details

## Contact
- Website: https://fast.io
- Support: https://fast.io/contact
- Security: https://fast.io/.well-known/security.txt