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SumOffice — real Word and Excel for agents

REMOTE · VIEW.SUMOFFICE.COM · 2 COMPONENTS · SCANNED SEP 20

Real Word and Excel for agents: open your .docx/.xlsm, read, propose, apply, get it back intact.

62 Trust /100
Trust breakdown (7 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →

Endpoint Security57
Transport & Reachability100
Schema Quality & AI Usability77
  • AI-judged instruction clarity (good).Pass
  • Tool/resource definitions use about 1539 tokens (~73/item across 21 items; 21 tools + 0 resources), lean.Pass
  • Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management0
  • Stability not yet verified: not enough scan history yet (needs a 30-day window).Unverified
Tool Coverage72
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 15% of tool parameters carry a description.Partial
Tool Safety100
  • No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
  • We read all 21 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
  • An AI judge read all 21 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
  • Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass

Unverified: 1 category

A category scored 0 because we could not verify it: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.

Install

How do I install the SumOffice — real Word and Excel for agents MCP server?

SumOffice — real Word and Excel for agents is a hosted endpoint at https://view.sumoffice.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

remote · view.sumoffice.com

# add to Claude Code
claude mcp add --transport http com-sumoffice-office 'https://view.sumoffice.com/mcp'
// .cursor/mcp.json
{
  "mcpServers": {
    "com-sumoffice-office": {
      "url": "https://view.sumoffice.com/mcp"
    }
  }
}
// .vscode/mcp.json
{
  "servers": {
    "com-sumoffice-office": {
      "type": "http",
      "url": "https://view.sumoffice.com/mcp"
    }
  }
}
# ~/.codex/config.toml
[mcp_servers.com-sumoffice-office]
url = "https://view.sumoffice.com/mcp"
// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-sumoffice-office": {
      "type": "remote",
      "url": "https://view.sumoffice.com/mcp",
      "enabled": true
    }
  }
}
# add to OpenClaw
openclaw mcp add com-sumoffice-office --url 'https://view.sumoffice.com/mcp' --transport streamable-http
# ~/.hermes/config.yaml
mcp_servers:
  com-sumoffice-office:
    url: "https://view.sumoffice.com/mcp"
// ~/.netclaw/config/netclaw.json
{
  "McpServers": {
    "com-sumoffice-office": {
      "Transport": "http",
      "Url": "https://view.sumoffice.com/mcp"
    }
  }
}
# add to Vellum
assistant mcp add com-sumoffice-office -t streamable-http -u 'https://view.sumoffice.com/mcp'
// mcp.json
{
  "mcpServers": {
    "com-sumoffice-office": {
      "type": "http",
      "url": "https://view.sumoffice.com/mcp"
    }
  }
}

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

  • 20 Sept 26 62

    First indexed and scored.

Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 20 Sept 2026 · Probed https://view.sumoffice.com/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject Issuer Valid from Valid until Key Signature Serial
CN=view.sumoffice.com CN=YE2,O=Let's Encrypt,C=US 2 Sept 2026 1 Dec 2026 ECDSA 256 ECDSA-SHA384 60381d15f5c2aee4de97136c8fac7428775
SANs: view.sumoffice.com
CN=YE2,O=Let's Encrypt,C=US (CA) CN=Root YE,O=ISRG,C=US 3 Sept 2025 2 Sept 2028 ECDSA 384 ECDSA-SHA384 4df3b15dd6c0784c507cd37b58e6f115
CN=Root YE,O=ISRG,C=US (CA) CN=ISRG Root X2,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 ECDSA 384 ECDSA-SHA384 872165fc34b6e5fba8add5b3705fb53a
CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) CN=ISRG Root X1,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 ECDSA 384 SHA256-RSA 6c8f1dc727c7117f7baf853ac980f9cd

Background: What to check on a remote MCP endpoint →

DNSSEC insecure

Validation of view.sumoffice.com. Not signed

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
com. present 19718 13 Verified
sumoffice.com. absent Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation
Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result No authorisation required
HTTP status 200

Background: How OAuth 2.1 works in the 2026 MCP spec →

Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://view.sumoffice.com/mcp Verified 200
http (plaintext) http://view.sumoffice.com/mcp HTTPS enforced 301 https://view.sumoffice.com/mcp
MCP tools · 21 exposed · ~1,539 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →

Tool Tokens
document_apply ~68

Apply a proposal from document_propose_replacement to the document in this session's cabin (not to your original file). Stale proposal (the document moved on) is refused by the engine — propose again. Repeating an applied proposal is a no-op.

NameTypeReqDescription
proposal_idstringyes

No output schema declared.

No examples provided.

document_comments ~27

Comments (author, text, anchor, resolved) and tracked changes — up to 50.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

document_describe ~36

Name, pages, paragraphs, words, number of comments and tracked changes, whether track changes is on. For documents; call first.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

document_export_pdf ~59

Lay out the document as it is now in this session's cabin (after applied proposals, or as opened) and return a PDF download link valid for 24 hours, plus the page count. Documents only; for workbooks use document_save_copy.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

document_find ~31

Paragraphs containing the text (case-insensitive), with snippets around the match.

NameTypeReqDescription
querystringyes

No output schema declared.

No examples provided.

document_open ~104

Open one of the demo files by name: documents footnotes, comments, forms, rtl, wild-horse, workshop, offer; workbooks workbook, functions, macros, queries, gep, vba-web, sqlite, order-desk, onrr, cashflow, pivot, chart, notes, check, xtools. Default is footnotes. For your own file use document_open_file. Opens a separate editor cabin for this session.

NameTypeReqDescription
slugstringyes

No output schema declared.

No examples provided.

document_open_file ~192

Open YOUR file in a private editor cabin for this session: a .docx/.doc/.odt document or an .xlsx/.xlsm/.xlsb/.xls/.ods workbook, up to 50 MB. Give exactly one of: url (https link the server can fetch), base64 (file bytes; then name with the extension is required). Nothing in the file is executed. The file is kept for 24 hours and then deleted. After opening, use document_* tools for a document or sheet_* / macro_* / query_* / workbook_inspect for a workbook; sheet_propose_edits → sheet_apply and document_propose_replacement → document_apply change the copy in the cabin; document_save_copy returns a download link of the edited file.

NameTypeReqDescription
base64string
namestring
pathstring
urlstring

No output schema declared.

No examples provided.

document_propose_replacement ~91

Propose the full new text of one paragraph (paragraph_index from document_read). Nothing changes yet: the editor core builds the change on a copy and returns before/after plus checks (numbers, dates, links kept). Then call document_apply with the proposal_id. Read the paragraph first.

NameTypeReqDescription
paragraph_indexintegeryes
reasonstring
textstringyes

No output schema declared.

No examples provided.

document_read ~73

Paragraph text as a window: from = index of the first paragraph (0-based), count = how many (max 40). The answer carries next — where to continue, null at the end. A missing paragraph is a refusal, not an invention.

NameTypeReqDescription
countinteger
fromintegeryes

No output schema declared.

No examples provided.

document_save_copy ~99

Write the document or workbook as it is now in this session's cabin (after applied proposals) to a copy and return a download link valid for 24 hours. Your original file is never touched. A workbook with macros comes back as .xlsm with the VBA project intact; a document keeps its styles, comments and tracked changes.

NameTypeReqDescription
inlinebooleanalso return the bytes as base64 (only for files up to 4 MB)

No output schema declared.

No examples provided.

macro_list ~30

List VBA modules and runnable macros (entry points) in this workbook with their route and blockers. Runs nothing.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

macro_plan ~51

Plan a macro run without running it: route, whether the engine can run it natively, blockers, instruction budget.

NameTypeReqDescription
active_sheetstring
entrypointstringyesModule.Procedure

No output schema declared.

No examples provided.

macro_read_source ~45

Read the source text of one procedure (module + procedure name from macro_list). Read-only; runs nothing.

NameTypeReqDescription
modulestringyes
procedurestringyes

No output schema declared.

No examples provided.

query_explain ~43

Explain one Power Query query by name: its steps in order, where it loads, its connection. Reads only; refreshes nothing.

NameTypeReqDescription
namestringyes

No output schema declared.

No examples provided.

query_list ~33

List Power Query queries in this workbook: names, step chain, load target, connections. Reads only; refreshes nothing.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

sheet_apply ~71

Apply a proposal from sheet_propose_edits to the workbook in this session's cabin (not to your original file); the engine recalculates. Refused if the workbook revision moved on since the proposal — propose again. Repeating an applied proposal is a no-op.

NameTypeReqDescription
proposal_idstringyes

No output schema declared.

No examples provided.

sheet_describe ~57

Workbook overview: every sheet tab with its used range, the current revision, and the header row of the sheet that is open. Call this first, then pass the tab name you need as "sheet" to sheet_read and sheet_find.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

sheet_find ~89

Find cells whose value or formula contains the text (case-insensitive) in the used range of a sheet. ALWAYS pass "sheet" with the exact tab name when the workbook has more than one sheet: without it only the sheet that happens to be open is searched.

NameTypeReqDescription
querystringyes
sheetstringExact tab name. Required when the workbook has more than one sheet.

No output schema declared.

No examples provided.

sheet_propose_edits ~114

Propose new contents for up to 20 cells (formulas like =SUM(B2:B9), or numbers/text). Nothing changes in the workbook: the engine previews the edits on the current revision and reports what would change and whether errors appear; the person decides whether to apply. Read the cells first. Do not overwrite input numbers unless the task says so. Then call sheet_apply with the proposal_id.

NameTypeReqDescription
editsarrayyes
reasonstring
sheetstring

No output schema declared.

No examples provided.

sheet_read ~124

Read a rectangular range like A1:F20 (max 60 rows × 26 columns): values and formulas. Empty cells are omitted. ALWAYS pass "sheet" with the exact tab name when the workbook has more than one sheet — without it you read whichever sheet happens to be open, and the answer will quietly be about the wrong sheet. Call sheet_describe first if you do not know the tab names.

NameTypeReqDescription
rangestringyes
sheetstringExact tab name, e.g. "Logical". Required when the workbook has more than one sheet.

No output schema declared.

No examples provided.

workbook_inspect ~102

Map the whole application model of this workbook in one call: sheets; VBA modules, procedures, which can run here and which are blocked and why; event handlers; external objects (CreateObject) and Windows API (Declare) dependencies; project references; Power Query queries; data connections; form controls, ActiveX, embedded objects (preserved). Runs nothing. Call this first for questions like 'how is this workbook built' or 'what does it depend on'.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

Common questions

What is the SumOffice — real Word and Excel for agents MCP server?

SumOffice — real Word and Excel for agents is an MCP server listed in the public MCP registry as com.sumoffice/office. Real Word and Excel for agents: open your .docx/.xlsm, read, propose, apply, get it back intact. This page covers its hosted endpoint (https://view.sumoffice.com/mcp).

Is the SumOffice — real Word and Excel for agents MCP server safe to use?

SumOffice — real Word and Excel for agents scores 62 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

What tools does the SumOffice — real Word and Excel for agents MCP server expose?

SumOffice — real Word and Excel for agents exposes 21 tools: document_open, document_open_file, document_describe, document_read, document_find, and 16 more. Their descriptions and schemas cost roughly 1,539 tokens of context every time the server is loaded.

Does the SumOffice — real Word and Excel for agents MCP server require authentication?

No. We connected to SumOffice — real Word and Excel for agents without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

Is the SumOffice — real Word and Excel for agents MCP server still maintained?

SumOffice — real Word and Excel for agents is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.