SumOffice MCP server

• Registry namecom.sumoffice/officeverified in the MCP registry

The registry name sits under sumoffice.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-25
• Tools21
• Server calls itselfsumoffice-document
• Server version0.3.0
• Protocol version2025-06-18

On 2026-10-25 the server answered initialize and tools/list without a sign-in. First answer in 464 ms.

• Whether its tools do the product's job has not been judged yet.
• Checked on 2 of the 7 days it takes to judge reliability.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

• INITE MCP scoreafter a weeka score needs 7 daily checks: 2 so far
• Answeredmeasuring2 of the 7 daily checks it takes to print a share
• Median first answer490 ms
• Space in an agent's context≈ 2,531 tokensthe definitions of all its tools (21), which an agent carries on every turn
• Tool definitionsC · 73 of 100
• Typed results0 of 21 toolsdeclared outputSchema: results come typed, read once

• Parameters without a description: in 13 of 21
• Not saying whether it only reads or can destroy: 21 of 21

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

• document_open

  Open 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…

• document_open_file

  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…

• document_describe

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

• document_read

  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.

• document_find

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

• document_comments

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

• document_propose_replacement

  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…

• document_apply

  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…

• sheet_describe

  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.

• sheet_read

  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…

• sheet_find

  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…

• macro_list

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

• macro_read_source

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

• macro_plan

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

• query_list

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

• query_explain

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

• workbook_inspect

  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…

• sheet_propose_edits

  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…

• sheet_apply

  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…

• document_save_copy

  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…

• document_export_pdf

  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.