# Fastio (slim)

> Fastio is hosted file storage with workspaces, share links and document search for teams and AI agents, from VividEngine, LLC. Agents reach it through a REST API, a hosted MCP server and an open-source CLI.

- Full: https://www.anchorterminal.com/tools/fast-io.md (~7,500 tokens) · this version ~1,680 tokens · JSON https://www.anchorterminal.com/tools/fast-io.json · canonical https://www.anchorterminal.com/tools/fast-io
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-10

**C · 55.2/100 · rank #663 of 950 · #12 in File storage & sharing · not agent-ready · confidence medium**


Assessment: OAuth with PKCE, scoped API keys with read, write and admin modes, and separate read and write MCP tools limit what an agent can touch. There is no free tier, the 30-day trial needs a card, and no status page, SLA, OpenAPI file or public changelog was found.

## Facts

- Kind: HTTP API · vendor: VividEngine, LLC · category: File storage & sharing · legal entity: VividEngine, LLC (doing business as Fast Technologies) · provenance 51/100
- Endpoint: `https://mcp.fast.io/mcp/tools` (HTTP, Streamable HTTP, stdio)
- Auth: OAuth or key · pricing: Paid · x402: no · licence: Proprietary service under Fast's terms of service. The CLI, which includes a local MCP server, is Apache-2.0
- Probe metrics: not measured yet (probes haven't run)
- Surfaces: REST API at https://api.fast.io/current/ (version 1.0, form-encoded requests, JSON responses), hosted MCP server over Streamable HTTP, and the `fastio` CLI with a local stdio MCP server
- MCP endpoints: `https://mcp.fast.io/mcp/tools` (35 named tools), `/mcp/code` (8 tools), `/mcp/operations` (one tool per operation). The earlier `/mcp` and `/sse` addresses still work
- Credentials: OAuth 2.0 with PKCE and dynamic client registration, or API keys scoped by entity with `r`, `rw` or `rwa` access and optional expiry
- Plans: Starter $9.99 a month or $99 a year, Business $49.99 or $499, Enterprise $199.99 or $1,999. 250 GB, 5 TB and 25 TB of storage, and 3, 10 and 30 seats
- Credits: Storage 150 a GB, bandwidth 400 a GB, AI chat 1 per 100 tokens, document indexing 10 a page, file conversion 25 each. Overage $0.0001 a credit
- Rate limits: Reported in `x-ve-limit-avail`, `x-ve-limit-max` and `x-ve-limit-expires` headers. 429 with error code 10368. No numbers published
- Uploads: Single request under 4 MB, chunked above, 3 chunks in parallel, CRC-32C recommended, maximum file size 25, 50 or 100 GB by plan
- Sharing: Send, Receive and Exchange shares with password, expiry and download controls, and single-file links with optional `expires`
- Audit: Activity log on every plan, kept 30, 180 or 365 days. CSV or JSONL export and a signed SIEM stream on Enterprise
- Deletion: Grace periods of 15 days for shares, 30 for workspaces, 60 for organisations and 90 for user accounts, 180 days where an organisation had a subscription
- Certifications: Google CASA Assurance Level 1. No SOC 2 report. The data centre provider holds SOC 2 Type II and ISO 27001 per the Trust Centre
- CLI: `@vividengine/fastio-cli` 0.2.93 (8 October 2026), Rust, Apache-2.0, for macOS, Linux and Windows
- Prices: Starter plan $9.99 per month (plan); Business plan $49.99 per month (plan); Enterprise plan $199.99 per month (plan); Additional storage $0.015 per GB per month; Additional bandwidth $0.04 per GB of traffic; Credit overage $0.0001 per credit

- Scores: Reliability 33, Performance pending, Schema & documentation 65, Agent ergonomics 73, Security & auth 74, Payments & pricing 30, Task success pending, Maintenance & community 70, Transparency & trust 61 · negative events -2 · total over the 7 assessed categories
- Why: Reliability, No status page or incident history found on fast.io, the docs or the Trust Centre (0 + 5 for no readable history). · Schema & documentation, No OpenAPI file. · Agent ergonomics, 35 tools in named mode, 39 with import and signing (5). · Security & auth, OAuth 2.0 with PKCE (S256), dynamic client registration and consent to scopes, or revocable API keys scoped by entity and access mode with o… · Payments & pricing, No x402, MPP or L402. HTTP 402 signals a missing plan or spent credits and carries no payment terms (0). · Maintenance & community, CLI v0.2.93 on 8 October 2026 and MCP guide 2.92 on 7 October (30). · Transparency & trust, Closed service under clear terms dated 2 October 2026. The CLI is Apache-2.0 (18).
- Sources: 21, open questions: 9, both in the full twin
- Capabilities: storage.drive, storage.share, knowledge.search
- JSON: https://www.anchorterminal.com/api/v1/tools/fast-io.json
- Verify (for the vendor): the badge `https://www.anchorterminal.com/badges/fast-io.svg` or a link to https://www.anchorterminal.com/tools/fast-io from a page on fast.io or one of its subdomains, or the README of github.com/MediaFire/fastio_cli, then `POST https://www.anchorterminal.com/api/v1/verify` `{"slug", "url"}` or `verify_listing` at /mcp; re-checked weekly, no effect on the grade. Snippets in the full twin.

## Before you call it

1. Connect to `https://mcp.fast.io/mcp/tools` for named tools or `https://mcp.fast.io/mcp/code` for the 8-tool code mode. The URL fixes the tool set for the session
2. Call `action="describe"` on a tool before first use. Parameters live there, not in the tool list
3. To update a file, upload again with the same parent folder and filename. Deleting first loses the version history
4. On 429 wait until `x-ve-limit-expires` or the `Retry-After` value. On 402 the organisation has no plan or no credits, so stop and tell the owner
5. Ask the owner for a key scoped to one workspace with `r` or `rw`. A key made without scopes carries `user:*:rw` across the account

## Connect

```bash
npm install -g @vividengine/fastio-cli
```
Full config and headless snippets are in the full page. Through letme (picks today, calling later): https://letme.dev/fast-io

## Similar tools

| Tool | Grade | Score | Shared capabilities | Slim |
| --- | --- | --- | --- | --- |
| Google Drive API + MCP | A | 79.6 | storage.drive, storage.share | https://www.anchorterminal.com/tools/google-drive-api.min.md |
| Box API + MCP | B | 69.4 | storage.drive, storage.share | https://www.anchorterminal.com/tools/box-api.min.md |
| Dropbox API + MCP | B | 68.2 | storage.drive, storage.share | https://www.anchorterminal.com/tools/dropbox-api.min.md |
| OneDrive and SharePoint files (Microsoft Graph) | B | 65.3 | storage.drive, storage.share | https://www.anchorterminal.com/tools/onedrive-sharepoint.min.md |
| Amazon S3 | BB | 77.9 | storage.share | https://www.anchorterminal.com/tools/amazon-s3.min.md |


## Panel reviews (0, desk reviews from public material, no calls made)