Fast.io MCP Skill Package

Cloud file management and collaboration for AI agents — upload outputs, create branded data rooms, query documents with built-in AI, and hand everything off to a human when the job is done.

What is Fast.io?

Fast.io gives AI agents a complete file management and collaboration platform through the Model Context Protocol (MCP). No infrastructure to manage, no subscriptions to set up, no credit card required.

Problem	Solution
Nowhere professional to put agent outputs	Branded workspaces with file preview for 10+ formats
Sharing files with humans is awkward	Purpose-built shares (Send, Receive, Exchange) with passwords, expiration, branding
Collecting files from humans is harder	Receive shares let humans upload directly to you
Understanding document contents	Built-in AI reads, summarizes, and answers questions about your files
Building a RAG pipeline from scratch	Enable intelligence and files are automatically indexed, summarized, and queryable
Handing a project off to a human	One-click ownership transfer — human gets the org, agent keeps admin access

Connecting

Transport	Endpoint
Streamable HTTP (recommended)	https://mcp.fast.io/mcp
Legacy SSE	https://mcp.fast.io/sse

Tools

The server exposes 14 consolidated tools using action-based routing. Each tool covers a domain and uses an action parameter to select the operation.

Tool	Domain	Key Actions
auth	Authentication	signin, signup, set-api-key, pkce-login, pkce-complete, status
org	Organizations	list, details, create, update, create-workspace
workspace	Workspaces	list, details, create, update, check-name
share	Shares	list, create, update, delete, quickshare-create
storage	Files, folders, locks, previews	list, details, search, create-folder, create-note, move, delete, lock-acquire, preview-url
upload	File uploads	create-session, chunk, finalize, text-file, web-import
download	Downloads	file-url, zip-create, quickshare-details
ai	AI chat	chat-create, message-send, message-read, chat-list
member	Members	add, update, remove, details
invitation	Invitations	list, send, revoke, accept-all
asset	Branding assets	types, list, upload, delete
comment	Comments	list, create, details, delete
event	Events & audit	search, details, summarize, activity-poll
user	Account management	me, update, invitation-list, allowed

Resources

URI	Description
skill://guide	Full tool documentation, workflows, and constraints
session://status	Current authentication state

Prompts

Guided workflows for common multi-step operations:

Prompt	Purpose
get-started	Account creation, org setup, onboarding, and auth methods (PKCE, API key)
add-file	Adding files from text content, binary upload, or URL import
ask-ai	Querying files with AI chat (RAG scoping, attachments, polling)
comment-conversation	Agent-human feedback on files via anchored comments, threads, and deep-link URLs
catch-up	AI activity summaries, event search, and real-time change monitoring

Authentication

Four ways to authenticate:

1. Agent account — auth action signup creates a free agent account (50 GB storage, 5,000 monthly credits)
2. API key — auth action set-api-key with a key from an existing human account
3. Sign in — auth action signin with email and password
4. PKCE browser login — auth action pkce-login for secure OAuth 2.0 flow without sharing passwords

Agent Plan (Free)

Resource	Included
Price	$0 — no credit card, no trial, no expiration
Storage	50 GB
Max file size	1 GB
Monthly credits	5,000
Workspaces	5
Shares	50
Members per workspace	5

Core Capabilities

• File storage with versioning, folder hierarchy, full-text and semantic search
• Branded shares (Send/Receive/Exchange) with passwords, expiration, custom branding, file preview
• Built-in AI/RAG — ask questions about files with citations, scoped to folders or entire workspaces
• File preview — images, video (HLS), audio, PDF, spreadsheets, code rendered inline
• URL import — import files from any URL including Google Drive, OneDrive, Dropbox
• Comments & annotations — anchored to image regions, video/audio timestamps, PDF pages
• Ownership transfer — build an org, then transfer to a human; agent keeps admin access
• Real-time collaboration — WebSocket-based live presence and instant sync

Common Workflows

Deliver a report: Upload file, create a Send share with password and expiration, share the branded link.

Collect documents: Create a Receive share, send the link, files appear in your workspace and get AI-indexed.

Build a knowledge base: Create an intelligent workspace, upload documents, query across all content with AI chat.

Set up a project for a human: Create org, workspaces, shares, upload content, configure branding, transfer ownership.

Package Contents

File	Description
SKILL.md	Complete agent guide with tool documentation, workflows, and constraints
references/REFERENCE.md	Platform deep-dive — capabilities, plan details, URL construction

Links

• Platform guide: https://fast.io/agents.md
• API reference: https://api.fast.io/llms.txt
• Website: https://fast.io