What tools does the Fast.io MCP server provide?
The server exposes 251 tools covering file management, sharing, collaboration, and document retrieval.
F
Fast.io MCP Server
@MediaFire
基本情報
Fast.io MCP Server について
AI-first file sharing and collaboration. 251 MCP tools give agents a full workspace: file storage, branded shares, comments, workflows, and built-in RAG. Free tier includes 50GB storage and 5,000 monthly credits, no credit card. Built by the team behind MediaFire. Works with Clau
Fast.io MCP Server の設定
以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。
{
"mcpServers": {
"fast-io": {
"url": "https://mcp.fast.io/mcp"
}
}
}Fast.io MCP Server のツール
19Auth & sessions: signin, signup, signout, 2FA, PKCE, API keys, OAuth sessions. Call action='describe' for the full action/param reference. Destructive: api-key-delete, oauth-revoke, oauth-revoke-all.
File upload: stream-upload (one-shot — auto-finalizes, no filesize needed), chunked (create-session → chunk → finalize, for exact-known-size or files split across blobs), web URL import, and batch (many small files). Call action='describe' for the full action/param reference. Side effects: finalize/stream/stream-upload/web-import/batch create files and consume storage credits. Same-name uploads to a folder OVERWRITE the existing node in place (preserved as a recoverable version). BYTES → SERVER: the **DEFAULT for every file/binary is the `POST /blob` sidecar** — a plain HTTP POST outside the MCP pipe (the create-session/blob-info response hands you a ready-to-run curl command) that returns a `blob_id` you pass to stream-upload/chunk/batch: no base64, no MCP size limit, up to 100 MB. Use `content_base64` (inline base64, capped a few MB by the MCP transport) ONLY when your client cannot make the POST /blob call. `content` is small text only (verbatim UTF-8). UPLOAD STRATEGY (read top-to-bottom, pick the FIRST that matches): (1) Have a URL? → `web-import` (single call). (2) DEFAULT for a file/binary → `POST /blob`, then `stream-upload` with `blob_id` (single call, auto-finalizes, NO filesize required). Unknown/generated size and no way to reach /blob → `stream-upload` with `content_base64`. (3) Known exact byte count, or a large file split across blobs → `create-session` + `chunk`(`blob_id`) + `finalize`. **filesize must match the bytes you actually upload — mismatch causes finalize to fail with code 10522 and you must cancel the session.** (4) Multiple small files (≤4 MB each, ≤200 total) into one folder? → `batch`. Prefer `blob_id` (POST /blob) for every file/binary upload; fall back to `content_base64` only when you cannot reach /blob. Do NOT guess `filesize` for generated content — use `stream-upload`. max_size is a hard ceiling that aborts mid-transfer — always overestimate or omit (server uses plan limit).
User profile, contacts, invitations, and assets. Call action='describe' for the full action/param reference. Destructive: close.
Organization management: CRUD, billing, members, invitations, ownership transfer, assets, discovery. Call action='describe' for the full action/param reference. Destructive: close (permanently deletes org and all data).
Workspace management: list/details/update/delete, archive, members, notes, quickshares, share import, import toggle. NOTE: metadata actions MOVED — templates + AI extraction → `metadata` tool; node-level metadata → `storage` tool. The `metadata-*` actions here are deprecated one-release execute-and-warn shims, removed next release. Call action='describe' for the full action/param reference. Destructive: delete (workspace + all files). ⚠️ intelligence COSTS CREDITS (10/page) — only enable on explicit user request; toggle is rate-limited. Verbosity (detail param): list/available/members/list-shares default to terse (compact rows). details defaults to full (drill-down). Pass an explicit detail='standard'|'full' to override.
Share management: create/update/delete, archive, password auth, members, autotitle. NOTE: quickshare-create is DEPRECATED (returns error 10756) — use the `fileshare` tool's `create` action for durable single-file shares. Call action='describe' for the full action/param reference. Destructive: delete (permanent). Side effects: autotitle AI-generates + applies a title/description (consumes credits, mutates share metadata). ⚠️ intelligence on create COSTS CREDITS (10/page) — default false unless user explicitly requests RAG. Verbosity (detail param): list/available/members default to terse (compact rows). public-details defaults to standard. details defaults to full (drill-down). Pass an explicit detail='terse'|'standard'|'full' to override.
File Shares: durable single-file share links. create/list/details/update/delete, per-user grants (grant-list/grant-add/grant-revoke incl. grant-by-email with pending invites), and direct read/preview/version URLs. Call action='describe' for the full action/param reference. Bound to ONE workspace file (immutable binding); deletion NEVER touches the bound file. Recipient 404 is UNIFORM — not-found / revoked / expired are indistinguishable by design (do not speculate). Passwords are supplied via the x-ve-password header (the `password` input) — never placed in URLs. Destructive: delete (removes the share, not the file). Reversible access change: grant-revoke (re-grantable). download-url / preview-url / version-download-url return a DIRECT API URL — gated shares require Authorization and/or x-ve-password HEADERS on the GET (the password is never embedded in the URL).
Coordination Rooms — a private, workspace-scoped space for agentic teams (agents + humans) to join, post messages, track each other's status/presence, and hand off files. Create is idempotent per (workspace, topic_slug). Presence is refreshed by ANY room call; liveness ≠ progress. Hand files off via the `upload` tool into the room's storage. Call action='describe' for the full protocol + action/param reference.
Files & folders on workspaces/shares: list, search, copy, move, delete, rename, trash, transfer, versions, locks, previews, and per-node metadata (get/set/delete/extract/versions). Call action='describe' for the full action/param reference. Destructive: purge (irreversible). delete moves to trash. metadata-delete removes metadata keys. Verbosity (detail param): list/recent/search/trash-list default to terse (compact rows). details defaults to full (drill-down). Pass an explicit detail='standard'|'full' to override.
AI metadata templates & extraction (the unstructured-data automation pipeline): template CRUD/clone, assign/resolve, the AI pipeline (eligible -> preview-match -> suggest-fields -> template-create -> nodes-add/-list -> auto-match -> extract-all), saved views, and lexical metadata search. Call action='describe' for the full action/param reference. Node-level metadata (get/set/delete/extract on a single file) lives on the `storage` tool. Destructive: template-delete, view-delete, nodes-remove. AI/credit side-effects: preview-match, suggest-fields, auto-match, extract-all (each spends AI credits).
Unified search across a workspace or share — ONE query, results GROUPED BY TYPE into buckets (files, metadata [workspace only], comments), each independently paginated and health-reported. Call action='describe' for the full action/param reference. This is the grouped SUPERSET; for a single result type prefer the narrower tools: `storage action=search` (files only), `metadata action=search` (lexical metadata fields only). The code-mode `search` tool searches the API endpoint catalog, not your content.
Download URLs for files (file-url), folder ZIPs (zip-url), and quickshare links (quickshare-details — DEPRECATED, use the `fileshare` tool's `create` action for new shares). Consumes bandwidth credits. Call action='describe' for the full action/param reference.
Ripley — the MCP delegation surface over Fastio's RAG agent. Ripley is read-only for storage CONTENT: it answers natural-language questions about workspace/share files & folders (with citations) and never creates/edits/deletes your files — for content writes, call the primitive MCP tools directly. It DOES create/manage chat threads (chat-create/chat-update/chat-delete/message-send) and can generate shares (share-generate). Prefer Ripley over issuing many primitive reads: ask one NL question and let the server-side agent search + synthesize. Quick start: action='ask' (question + profile) → returns {answer_text, citations, chat_id, message_id, web_url}; action='status' for an engineered workspace-status summary. Lower-level chat/message actions remain for multi-turn control. Call action='describe' for the full action/param reference. Destructive: chat-delete. Side effects: ask/status/chat-create/message-send consume credits; chat-cancel terminates an in-progress message (partial tokens billed; idempotent). Verbosity (detail param): chat-list/message-list default to terse (compact rows). chat-details/message-details default to full (drill-down). Pass an explicit detail='standard'|'full' to override (best-effort: chat/message/activity endpoints may not yet honor detail server-side).
Comments on files: add/list/delete/react, anchor to image regions, A/V timestamps, PDF pages, or text selections. Call action='describe' for the full action/param reference. Destructive: delete, bulk-delete. Verbosity (detail param): list/list-all default to terse (compact rows). details defaults to full (drill-down). Pass an explicit detail='standard'|'full' to override (best-effort — may be a silent no-op until the comments API honors output=; see describe).
Event log and activity monitoring for workspaces and shares. Also surfaces the per-member DASHBOARD — a 'what's on your plate' feed of cards (@mentions, file activity) for one workspace, with view-only dismiss/snooze and a best-effort AI overlay. Call action='describe' for the full action/param reference. Verbosity (detail param): search/activity-list/activity-poll default to terse (compact rows). summarize defaults to standard (envelope around the AI summary). details defaults to full (drill-down). Pass an explicit detail='terse'|'standard'|'full' to override (best-effort on summarize/activity-list/activity-poll — only search/details honor output=; see describe).
Workspace/share member management: list, add, remove, update, transfer ownership, join, leave. Call action='describe' for the full action/param reference. Destructive: remove.
Workspace/share invitations: list, filter by state, update, revoke. Call action='describe' for the full action/param reference. Destructive: delete.
Brand asset management (logos, banners, profile photos) on org/workspace/share/user. Upload, delete, list, read. Call action='describe' for the full action/param reference. Destructive: delete.
Built-in product help — ask a natural-language "how do I…" question about Fastio and get a grounded, product-aware answer (or a short clarifying question) back in one call. EXPLAIN-ONLY / ADVISORY: it returns GUIDANCE TEXT and performs NO platform action (it will not create shares, move files, or change anything) — read the guidance, then act with the other tools. Answers are grounded in Fastio's own how-to knowledge AND phrased in terms of these MCP tools — they name the concrete `<tool> action="…"` calls to make — so prefer this over guessing endpoints or burning exploratory calls. For Q&A over YOUR uploaded files (RAG) use the `ai` tool instead — `how-to` answers questions about Fastio ITSELF. FREE and requires only an authenticated user (no org, no plan gate, no billing). Call action='describe' for the full action/param reference.
概要
What is Fast.io?
Fast.io is an AI-first file sharing and collaboration platform. Its MCP server exposes 251 tools through a single remote endpoint, enabling AI agents to store, manage, share, and collaborate on files with built-in RAG and interactive UI widgets.
How to use Fast.io?
Connect to the Fast.io MCP server by configuring a Streamable HTTP endpoint in your MCP client using the URL https://mcp.fast.io/mcp.
Key features of Fast.io
- Store, upload, download, move, copy, rename files
- Create branded share links with custom domains
- Add comments, tasks, and approval workflows
- Built-in RAG for document querying and summarization
- Interactive UI widgets in agent chat
Use cases of Fast.io
- AI agents that upload and organize files across workspaces
- Creating branded file share links with access controls
- Running document analysis and retrieval without a separate vector database
- Collaborating on files with comments, tasks, and workflow approvals
- Rendering file pickers, viewers, and uploaders inside chat interfaces
よくある質問
How do I connect to the server?
Use Streamable HTTP with the URL `https://mcp.fast.io/mcp` in your MCP client configuration.
Is there a free tier?
Yes, the free tier includes 50 GB storage and 5,000 monthly credits with no credit card required and no expiration.
What is the license?
The Fast.io MCP server is licensed under Apache-2.0.
Where can I find documentation?
Documentation is available at https://docs.fast.io.
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