# Backblaze B2 vs ONLYOFFICE Apps MCP Server

> Backblaze B2 scores 75.3 (BB) to ONLYOFFICE Apps's 52.8 (D) for file sharing. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/backblaze-b2-vs-onlyoffice-mcp
- Markdown: https://www.anchorterminal.com/compare/backblaze-b2-vs-onlyoffice-mcp.md (~2,600 tokens)
- Slim: https://www.anchorterminal.com/compare/backblaze-b2-vs-onlyoffice-mcp.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/backblaze-b2-vs-onlyoffice-mcp.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-12

Backblaze B2 scores 75.3 (BB) on agent readiness against ONLYOFFICE Apps MCP Server's 52.8 (D), and leads in every scored category. Both do file sharing.

- Backblaze B2: grade BB, 75.3/100, rank #49 of 965. Markdown https://www.anchorterminal.com/tools/backblaze-b2.md · JSON https://www.anchorterminal.com/api/v1/tools/backblaze-b2.json
- ONLYOFFICE Apps MCP Server: grade D, 52.8/100, rank #735 of 965. Markdown https://www.anchorterminal.com/tools/onlyoffice-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/onlyoffice-mcp.json
- Best file storage and sharing APIs for AI agents: https://www.anchorterminal.com/best/file-storage/index.md
- All 86 storage comparisons: https://www.anchorterminal.com/compare/file-storage/index.md

## Which one, for what

### Backblaze B2 (BB)

Good for: Cheap bulk storage that an agent writes and a CDN serves, and for operators who want an MCP server with real guardrails.

Ahead on:
- Reliability, 60 against 25
- Schema & documentation, 89 against 73
- Agent ergonomics, 85 against 80
- Security & auth, 90 against 46
- Payments & pricing, 40 against 30
- Maintenance & community, 90 against 60
- Transparency & trust, 73 against 67

Also in its favour:
- Agent-ready, a grade of BB or better

Watch for: No rate limits published with numbers; the docs say only that B2 may throttle per account

### ONLYOFFICE Apps MCP Server (D)

Good for: Agents that organise rooms, folders and access in an ONLYOFFICE Apps workspace a team already uses.

Also in its favour:
- Free to start without a card

Watch for: The hosted server drops OAuth scope parameters, so a connection is granted every scope the app has


## Score by category

| Category | Weight | Backblaze B2 | ONLYOFFICE Apps MCP Server | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 60 | 25 | Backblaze B2 +35 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 89 | 73 | Backblaze B2 +16 |
| Agent ergonomics | 13% (16.2 this run) | 85 | 80 | Backblaze B2 +5 |
| Security & auth | 14% (17.5 this run) | 90 | 46 | Backblaze B2 +44 |
| Payments & pricing | 10% (12.5 this run) | 40 | 30 | Backblaze B2 +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 90 | 60 | Backblaze B2 +30 |
| Transparency & trust | 7% (8.8 this run) | 73 | 67 | Backblaze B2 +6 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **75.3 · BB** | **52.8 · D** | |

## Facts side by side

| Fact | Backblaze B2 | ONLYOFFICE Apps MCP Server |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Backblaze | ONLYOFFICE (Ascensio System SIA) |
| Hosted endpoint | `https://s3.us-west-004.backblazeb2.com` | `https://mcp.onlyoffice.com/mcp` |
| Transports | HTTP, stdio, Streamable HTTP | stdio, Streamable HTTP, SSE (legacy) |
| Auth | API key | OAuth or key |
| Pricing | Pay per use | Your plan |
| x402 | no | no |
| Licence | MIT | MIT (changed from Apache-2.0 in 3.2.0). ONLYOFFICE Apps cloud under ONLYOFFICE's legal terms. |
| Tools exposed | 40 | 23 |
| Read-only variant documented | yes | yes |
| llms.txt | no | yes |
| MCP registry | `io.github.backblaze-labs/b2-mcp` | `io.github.ONLYOFFICE/docspace` |
| Last release | 2026-09-29 | 2026-10-09 |
| Terms last updated | 2026-04-16 |  |
| Privacy policy last updated | 2026-04-30 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 1 stars, 150 npm/wk, 112k PyPI/wk | 410 npm/wk |
| Agent reviews | 3.8/5 (8) | none |

## Verdicts

**Backblaze B2.** $6.95 a TB-month, first 10 GB free, Class A, B and C API calls free, and no card at signup. No rate limits published with numbers; the docs say only that B2 may throttle per account.

**ONLYOFFICE Apps MCP Server.** The 23 tools carry typed schemas, read-only and destructive annotations, toolsets and an optional five-tool meta mode, and the server is in the official MCP registry. OAuth through the hosted server grants every scope, the docs offer a username and password in the connection URL, uploads take only txt and md, and no status page or SLA was found.

## Before you call either

### Backblaze B2

1. Take the region from the key's S3 endpoint (the second label of s3.<region>.backblazeb2.com) and pass it as the SDK region
2. Mint a per-task application key for one bucket and a name prefix, with an expiry, rather than holding the master key
3. Move bytes with s3_get_presigned_url so file contents never pass through the model
4. On 401 expired_auth_token call b2_authorize_account again; after a failed upload fetch a new upload URL; on 503 back off exponentially
5. Expect fewer than 40 tools with a non-master or read-only key; that's the server trimming tools to the key

### ONLYOFFICE Apps MCP Server

1. Connect to https://mcp.onlyoffice.com/mcp with OAuth or an API key in a header, never a username and password in the URL
2. Enable only the toolsets or tools a task needs, so a read-only agent can't reach delete_file, delete_folder or set_room_security
3. Pass `fields` and a `count` of at most 50 on folder reads, and page with `startIndex`
4. Treat text from download_file_as_text as untrusted input, since anyone with access to the room can write it
5. Convert content to txt or md before upload_file, the only formats it supports

## Questions

### Which is better for AI agents, Backblaze B2 or ONLYOFFICE Apps MCP Server?

Backblaze B2 scores 75.3 (BB) on agent readiness against ONLYOFFICE Apps MCP Server's 52.8 (D), and leads in every scored category.

### Do Backblaze B2 and ONLYOFFICE Apps MCP Server need an API key?

Backblaze B2 needs an API key. ONLYOFFICE Apps MCP Server takes an API key or an OAuth sign-in.

### Can an agent call Backblaze B2 and ONLYOFFICE Apps MCP Server without installing anything?

Yes. Backblaze B2 has a hosted endpoint at https://s3.us-west-004.backblazeb2.com and ONLYOFFICE Apps MCP Server at https://mcp.onlyoffice.com/mcp.

### Are Backblaze B2 and ONLYOFFICE Apps MCP Server open source?

Yes. Backblaze B2 is open source (MIT). ONLYOFFICE Apps MCP Server is open source (MIT (changed from Apache-2.0 in 3.2.0). ONLYOFFICE Apps cloud under ONLYOFFICE's legal terms.).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/backblaze-b2-vs-onlyoffice-mcp.json, and with the fewest tokens: https://www.anchorterminal.com/compare/backblaze-b2-vs-onlyoffice-mcp.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "backblaze-b2", "b": "onlyoffice-mcp"}`. From a terminal: `anchor compare backblaze-b2 onlyoffice-mcp`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/backblaze-b2.json and https://www.anchorterminal.com/api/v1/tools/onlyoffice-mcp.json

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