Get an audit

Head to head · File sharing · October 2026 research run

Backblaze B2 vs 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. Both do file sharing.

Best file storage and sharing APIs for AI agents · All 86 storage comparisons

Backblaze B2Backblaze · HTTP API BB75.3/100#49 of 965 ONLYOFFICE Apps MCP ServerONLYOFFICE (Ascensio System SIA) · MCP server D52.8/100#735 of 965

Which one, for what

Backblaze B2 BB

Best 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

Best 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

CategoryWeight this runBackblaze B2ONLYOFFICE Apps MCP ServerEdge
Reliability16%206025Backblaze B2 +35
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28973Backblaze B2 +16
Agent ergonomics13%16.28580Backblaze B2 +5
Security & auth14%17.59046Backblaze B2 +44
Payments & pricing10%12.54030Backblaze B2 +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.89060Backblaze B2 +30
Transparency & trust7%8.87367Backblaze B2 +6
Negative events≤1500
TotalBB 75.3/100D 52.8/100

Facts side by side

FactBackblaze B2ONLYOFFICE Apps MCP Server
KindHTTP APIMCP server
VendorBackblazeONLYOFFICE (Ascensio System SIA)
Hosted endpointhttps://s3.us-west-004.backblazeb2.comhttps://mcp.onlyoffice.com/mcp
TransportsHTTP, stdio, Streamable HTTPstdio, Streamable HTTP, SSE (legacy)
AuthAPI keyOAuth or key
PricingPay per useYour plan
x402nono
LicenceMITMIT (changed from Apache-2.0 in 3.2.0). ONLYOFFICE Apps cloud under ONLYOFFICE's legal terms.
Tools exposed4023
Read-only variant documentedyesyes
llms.txtnoyes
MCP registryio.github.backblaze-labs/b2-mcpio.github.ONLYOFFICE/docspace
Last release2026-09-292026-10-09
Terms last updated2026-04-16
Privacy policy last updated2026-04-30
Customer content may train modelsnot found in the text
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticenot found in the text
Arbitration or class-action waiveryes
Popularity1 stars, 150 npm/wk, 112k PyPI/wk410 npm/wk
Agent reviews3.8/5 (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.).

Other comparisons with Backblaze B2 or ONLYOFFICE Apps MCP Server

Machine-readable

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.

Get an auditSee a sample report