# Azure Blob Storage vs ONLYOFFICE Apps MCP Server

> Azure Blob Storage scores 75.7 (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/azure-blob-storage-vs-onlyoffice-mcp
- Markdown: https://www.anchorterminal.com/compare/azure-blob-storage-vs-onlyoffice-mcp.md (~2,800 tokens)
- Slim: https://www.anchorterminal.com/compare/azure-blob-storage-vs-onlyoffice-mcp.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/azure-blob-storage-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

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.

- Azure Blob Storage: grade BB, 75.7/100, rank #41 of 965. Markdown https://www.anchorterminal.com/tools/azure-blob-storage.md · JSON https://www.anchorterminal.com/api/v1/tools/azure-blob-storage.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

### Azure Blob Storage (BB)

Good 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)

Good 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

| Category | Weight | Azure Blob Storage | ONLYOFFICE Apps MCP Server | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 88 | 25 | Azure Blob Storage +63 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 85 | 73 | Azure Blob Storage +12 |
| Agent ergonomics | 13% (16.2 this run) | 84 | 80 | Azure Blob Storage +4 |
| Security & auth | 14% (17.5 this run) | 81 | 46 | Azure Blob Storage +35 |
| Payments & pricing | 10% (12.5 this run) | 20 | 30 | ONLYOFFICE Apps MCP Server +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 80 | 60 | Azure Blob Storage +20 |
| Transparency & trust | 7% (8.8 this run) | 80 | 67 | Azure Blob Storage +13 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **75.7 · BB** | **52.8 · D** | |

## Facts side by side

| Fact | Azure Blob Storage | ONLYOFFICE Apps MCP Server |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Microsoft | ONLYOFFICE (Ascensio System SIA) |
| Hosted endpoint | `https://<account>.blob.core.windows.net` | `https://mcp.onlyoffice.com/mcp` |
| Transports | HTTP | stdio, Streamable HTTP, SSE (legacy) |
| Auth | OAuth or key | OAuth or key |
| Pricing | Pay per use | Your plan |
| x402 | no | no |
| Licence | Proprietary service under Microsoft's Product Terms. The Azure SDK client libraries are MIT | MIT (changed from Apache-2.0 in 3.2.0). ONLYOFFICE Apps cloud under ONLYOFFICE's legal terms. |
| Tools exposed | none | 23 |
| Read-only variant documented | no | yes |
| llms.txt | no | yes |
| MCP registry | not listed | `io.github.ONLYOFFICE/docspace` |
| Last release | 2026-09-30 | 2026-10-09 |
| Terms last updated | no date given |  |
| Privacy policy last updated | 2026-09-01 |  |
| Customer content may train models | yes |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 12.5M npm/wk, 22.6M PyPI/wk | 410 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.).


## For agents

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

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