SumOffice — real Word and Excel for agents MCP server
online · 100% uptimecom.sumoffice/office·v0.3.1Real Word and Excel for agents: open your .docx/.xlsm, read, propose, apply, get it back intact.
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If you have run it, two minutes of your experience saves the next person an afternoon.
SumOffice — real Word and Excel for agents tools (21, 1 write)
write = sends, deletes, buys or postsdocument_applyFreeApply 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.
document_commentsFreeComments (author, text, anchor, resolved) and tracked changes — up to 50.
document_describeFreeName, pages, paragraphs, words, number of comments and tracked changes, whether track changes is on. For documents; call first.
document_export_pdfFreeLay 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.
document_findFreeParagraphs containing the text (case-insensitive), with snippets around the match.
document_openFreeOpen one of the demo files by name: documents footnotes, comments, forms, rtl, wild-horse, workshop, offer, tools; 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.
document_open_fileFreeOpen 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.
document_propose_replacementFreePropose 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.
document_readFreeParagraph 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.
document_save_copywrite actionFreeWrite 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.
macro_listFreeList VBA modules and runnable macros (entry points) in this workbook with their route and blockers. Runs nothing.
macro_planFreePlan a macro run without running it: route, whether the engine can run it natively, blockers, instruction budget.
macro_read_sourceFreeRead the source text of one procedure (module + procedure name from macro_list). Read-only; runs nothing.
query_explainFreeExplain one Power Query query by name: its steps in order, where it loads, its connection. Reads only; refreshes nothing.
query_listFreeList Power Query queries in this workbook: names, step chain, load target, connections. Reads only; refreshes nothing.
sheet_applyFreeApply 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.
sheet_describeFreeWorkbook 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.
sheet_findFreeFind 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.
sheet_propose_editsFreePropose 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.
sheet_readFreeRead 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.
workbook_inspectFreeMap 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'.
Public scan report
scanner v0.1.10 · 2026-10-16 · same rubric, same numbers if you re-run it
- –Code scanpackage could not be scannedn/a
- Live reliabilityremote reachable in 1516ms20/20
- Tool poisoning21 tool descriptions checked15/15
- Auth qualityopen endpoint exposes 1 write-action tools with no auth3/15
- Maintenancelast push 25 days ago15/15
- Maintainer identityendpoint served from the registry-verified namespace domain8/10
Findings (1)
- highWrite-action tools reachable without authentication
auth.open-write
How SumOffice — real Word and Excel for agents compares
Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 81/100
- higher than 62% of 48,243 servers
- Tools
- 21
- the typical server has 7
- Tools that change things
- 5%
- typical: 0%. Fewer write tools means less an agent can break
- Uptime
- 100%
- of our recent checks; the typical remote server answers 100%
- Response time
- 345 ms
- faster than 47% of 30,027 servers
What its tools let an agent do: 20 read · 1 change
Release history: 2 versions in the registry since 2026-09-20, latest 2026-09-21, typically one every 1 day.
Install SumOffice — real Word and Excel for agents in Claude Code, Cursor or VS Code
claude mcp add --transport http office https://view.sumoffice.com/mcp
What the publisher says
From the SumOffice — real Word and Excel for agents repository's README, as published. We do not edit it. Read it on GitHub
SumOffice MCP server — real Word and Excel for agents
One server, two ways to run it. The agent opens your .docx / .xlsx / .xlsm, reads it, proposes a change, you approve, the file comes back intact — Excel and Word open the result without a repair dialog. Macros (VBA) and Power Query travel with the file.
Registry name: com.sumoffice/office · page with proof: https://sumoffice.com/mcp · image: docker.io/hissih/sumoffice-mcp
Remote — nothing to install
https://view.sumoffice.com/mcp (streamable HTTP).
claude mcp add --transport http sumoffice https://view.sumoffice.com/mcpClients without HTTP support: npx -y mcp-remote https://view.sumoffice.com/mcp (see examples/).
Local over stdio — local file paths
docker run -i --rm -v "$PWD:/work" hissih/sumoffice-mcpThe server runs on your machine and accepts path in documentopenfile (paths under /work). The file itself is opened in a private, short-lived editor session on the SumOffice server and deleted after the session; nothing in the file is executed.
Tools
propose never writes: it returns a diff for the person or the client to approve; apply applies exactly that proposal. Every step is listed in the response, so the agent cannot change a file silently.
Examples
- examples/claude-desktop.json — Claude Desktop (claudedesktopconfig.json), local stdio via Docker.
- examples/cursor-mcp.json — Cursor (.cursor/mcp.json), remote HTTP.
- examples/claude-code.sh — Claude Code, both variants.
- examples/docker-compose.yml — the local server as a compose service with a mounted folder.
What it does not do yet
- One editor session per document at a time; a second agent on the same file gets read-only.
- Power Query definitions are preserved, not refreshed, in the server session.
- Macros are read and routed (which will run natively, which stay in Excel); they are not executed by the MCP server.
Limits and privacy
Free, no account. Remote: per-address daily quota; files are deleted after the session or 24 hours at most, never used for anything else. Details: https://sumoffice.com/app-privacy.html
Licence
This repository (documentation, manifest, examples) is MIT. The server image is free for evaluation and for use with the public endpoint; production use inside an organisation is licensed per application — https://sumoffice.com/download#server. Questions: hello@sumoffice.com
Nothing above is checked by us. What we check is on the safety report.
Grade history
- 2026-10-16restoreC → Bscore 81: Write-action tools reachable without authentication
SumOffice — real Word and Excel for agents: common questions
- Is SumOffice — real Word and Excel for agents MCP server safe?
- Mostly: it is graded B (81/100). Read the SumOffice — real Word and Excel for agents safety report
- How do I install SumOffice — real Word and Excel for agents?
- It runs remotely at view.sumoffice.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
- Does SumOffice — real Word and Excel for agents need an API key?
- Not as far as the registry entry and our scan can tell: no credentials are declared or required.
- Is SumOffice — real Word and Excel for agents maintained?
- The last commit was 45 days ago (2026-09-21). The latest release is v0.3.1.
- Is SumOffice — real Word and Excel for agents up?
- 100% of our last 28 checks got an answer. We check remote servers about four times a day.
- How does SumOffice — real Word and Excel for agents compare with other MCP servers?
- safety score 81/100 (higher than 62% of 48,243 servers); tools 21 (the typical server has 7); tools that change things 5% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.