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Head to head · File sharing · October 2026 research run

Azure Blob Storage vs ONLYOFFICE Apps MCP Server

Azure Blob Storage scores 75.7 (BB) on agent readiness against ONLYOFFICE Apps MCP Server's 52.8 (D), and leads in 6 of 7 scored categories. ONLYOFFICE Apps MCP Server leads on payments & pricing. Both do file sharing.

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

Azure Blob StorageMicrosoft · HTTP API BB75.7/100#41 of 965 ONLYOFFICE Apps MCP ServerONLYOFFICE (Ascensio System SIA) · MCP server D52.8/100#735 of 965

Which one, for what

Azure Blob Storage BB

Best for Agents and runtimes already on Azure, where a managed identity writes to one container with no stored key, and jobs that need tiers, immutability or geo-redundant copies.

Ahead on

  • Reliability, 88 against 25
  • Schema & documentation, 85 against 73
  • Security & auth, 81 against 46
  • Maintenance & community, 80 against 60
  • Transparency & trust, 80 against 67

Also in its favour

  • Agent-ready, a grade of BB or better

Watch for

Shared Key authorisation with the account's access keys is allowed until the owner sets AllowSharedKeyAccess to false

ONLYOFFICE Apps MCP Server D

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

Ahead on

  • Payments & pricing, 30 against 20

Also in its favour

  • Runs on your own machine
  • Free to start without a card
  • Open source

Watch for

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

Score by category

CategoryWeight this runAzure Blob StorageONLYOFFICE Apps MCP ServerEdge
Reliability16%208825Azure Blob Storage +63
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28573Azure Blob Storage +12
Agent ergonomics13%16.28480Azure Blob Storage +4
Security & auth14%17.58146Azure Blob Storage +35
Payments & pricing10%12.52030ONLYOFFICE Apps MCP Server +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88060Azure Blob Storage +20
Transparency & trust7%8.88067Azure Blob Storage +13
Negative events≤1500
TotalBB 75.7/100D 52.8/100

Facts side by side

FactAzure Blob StorageONLYOFFICE Apps MCP Server
KindHTTP APIMCP server
VendorMicrosoftONLYOFFICE (Ascensio System SIA)
Hosted endpointhttps://<account>.blob.core.windows.nethttps://mcp.onlyoffice.com/mcp
TransportsHTTPstdio, Streamable HTTP, SSE (legacy)
AuthOAuth or keyOAuth or key
PricingPay per useYour plan
x402nono
LicenceProprietary service under Microsoft's Product Terms. The Azure SDK client libraries are MITMIT (changed from Apache-2.0 in 3.2.0). ONLYOFFICE Apps cloud under ONLYOFFICE's legal terms.
Tools exposednone23
Read-only variant documentednoyes
llms.txtnoyes
MCP registrynot listedio.github.ONLYOFFICE/docspace
Last release2026-09-302026-10-09
Terms last updatedno date given
Privacy policy last updated2026-09-01
Customer content may train modelsyes
Terms restrict automated accessyes
Terms restrict benchmarkingyes
Terms or service can change without noticenot found in the text
Arbitration or class-action waivernot found in the text
Popularity12.5M npm/wk, 22.6M PyPI/wk410 npm/wk

Verdicts

Azure Blob Storage

Microsoft Entra ID roles can be scoped to one container, and a user delegation signature hands out a link that expires within seven days. Account keys with full access stay enabled until the owner turns them off, request logs are off until configured, and an Azure account needs a person, a phone number and a payment card.

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

Azure Blob Storage

  1. Request an Entra ID token for https://storage.azure.com/ and send it as a Bearer header with x-ms-version and x-ms-date. Put Blob also needs x-ms-blob-type: BlockBlob
  2. Ask for a Storage Blob Data role on the one container. Role changes can take up to 10 minutes to apply
  3. To share a file, call Get User Delegation Key, then sign a SAS with sp=r, spr=https and a short expiry. Treat the URL as a secret
  4. Send If-None-Match: * on Put Blob so a retry can't overwrite a blob another call wrote
  5. On 503 ServerBusy back off exponentially. After 500 OperationTimedOut check the blob's state before retrying, since the write may have succeeded

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, Azure Blob Storage or ONLYOFFICE Apps MCP Server?

Azure Blob Storage scores 75.7 (BB) on agent readiness against ONLYOFFICE Apps MCP Server's 52.8 (D), and leads in 6 of 7 scored categories. ONLYOFFICE Apps MCP Server leads on payments & pricing.

Do Azure Blob Storage and ONLYOFFICE Apps MCP Server need an API key?

Both take an API key or an OAuth sign-in.

Can an agent call Azure Blob Storage and ONLYOFFICE Apps MCP Server without installing anything?

Yes. Azure Blob Storage has a hosted endpoint at https://<account>.blob.core.windows.net and ONLYOFFICE Apps MCP Server at https://mcp.onlyoffice.com/mcp.

Are Azure Blob Storage and ONLYOFFICE Apps MCP Server open source?

No open-source release is listed for Azure Blob Storage. 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.).

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