McpStamp Spreadsheets

io.github.theluckystrike/excel-spreadsheet-xlsx-csvtheluckystrikestreamable-httpv0.23.0Scanned 7 hours ago

Read, filter, group and write XLSX, CSV, TSV and JSON data, and convert between the formats.

13 tools: 2 can delete or cancel things, 1 do something that can't be undone, 8 change things and 2 only read.

Reads private data · 4
Reads text others write · 1
Can send data out · 1
1 finding

Anlyon alternative

11 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →

Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

13 tools

Deletes or cancels 2Removes, cancels or revokes something.Claude Code: deny

sheet_loadUpload data to work on.No findings
Why it is in this group
- The description's first verb is "upload": a word for a change.
- The server marks it destructive (destructiveHint: true).
Description, as the server wrote it
Upload data to work on. This hosted endpoint has no filesystem, so instead of a file path you send the data once with sheet_load and then pass its name as `path` to sheet_info, sheet_read, sheet_query, sheet_stats, sheet_find, sheet_add_column, sheet_convert and sheet_write. Give exactly one of csv (raw text, comma or tab separated), xlsx_base64 (a base64-encoded .xlsx workbook) or url. url: fetch a public file instead of pasting base64 (recommended above about 10 KB): the url is fetched here with a 10 second timeout, at most 3 redirects, public http(s) hosts only, and a 2 MB cap, and a fetched file is stored as an .xlsx when it carries the PK zip header and as delimited text otherwise. Loaded sheets are kept for your token and survive between calls; the total is capped at 2 MB per token. Files the other tools write come back as a download link that is valid for one hour.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: true
- idempotentHint: true
- openWorldHint: false
sheet_unloadDelete one sheet loaded for this token, freeing its space under the 2 MB cap.No findings
Why it is in this group
- The description's first verb is "delete": a word for removing or ending something.
- The server marks it destructive (destructiveHint: true).
Description, as the server wrote it
Delete one sheet loaded for this token, freeing its space under the 2 MB cap.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: true
- idempotentHint: false
- openWorldHint: false

Can't be undone 1Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

sheet_convertCall this tool to convert a sheet between excel (xlsx), csv and json.Can send data outNo findings
Why it is in this group
- The name "sheet_convert" says "convert": a word for a change.
- The input addresses people (input.to): what it sends cannot be taken back.
What it can reach
- outboundThe input takes a destination (input.to): what the tool writes goes there.
Description, as the server wrote it
Call this tool to convert a sheet between excel (xlsx), csv and json. Writes a new file next to the source unless out_path is given; the source is never modified. Returns the new file path with its row and column counts.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false

Changes things 8Creates or changes something that can be changed back.Claude Code: ask

license_activateTurn Pro on for this connection with key, an MCPL1.<payload>.<signature> issued at checkout for this server or the bundle.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
Turn Pro on for this connection with key, an MCPL1.<payload>.<signature> issued at checkout for this server or the bundle. Data under your token stays; a wrong or expired key changes nothing. license_status confirms it.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
sheet_add_columnCall this tool to add a computed column and save the result to a NEW file; the source is never modified unless out_path points at it.No findings
Why it is in this group
- The name "sheet_add_column" says "add": a word for a change.
Description, as the server wrote it
Call this tool to add a computed column and save the result to a NEW file; the source is never modified unless out_path points at it. Returns the new file path, the row count and a preview of the first rows.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
sheet_findCall this tool to search every cell of a spreadsheet or CSV for text; built-in file readers cannot parse spreadsheets.Reads private dataNo findings
Why it is in this group
- The name "sheet_find" says "find": a word for reading.
- The description's first verb is "call": a word for a change.
What it can reach
- private-dataThe description's first sentence says "file": it reads files.
Description, as the server wrote it
Call this tool to search every cell of a spreadsheet or CSV for text; built-in file readers cannot parse spreadsheets. Matching is case insensitive. Returns cell addresses with a preview of the row each hit is on.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
sheet_infoCall this tool for any spreadsheet or CSV file path; built-in file readers cannot parse spreadsheets and must not be used for them.No findings
Why it is in this group
- The description's first verb is "call": a word for a change.
Description, as the server wrote it
Call this tool for any spreadsheet or CSV file path; built-in file readers cannot parse spreadsheets and must not be used for them. Start here: sheet names, size, header row, column types and samples.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
sheet_queryCall this tool for any spreadsheet or CSV file path; built-in file readers cannot parse spreadsheets and must not be used for them.Reads private dataNo findings
Why it is in this group
- The name "sheet_query" says "query": a word for reading.
- The description's first verb is "call": a word for a change.
What it can reach
- private-dataThe description's first sentence says "file": it reads files.
Description, as the server wrote it
Call this tool for any spreadsheet or CSV file path; built-in file readers cannot parse spreadsheets and must not be used for them. Filter, group, aggregate and sort in one call; never hand sums over sheet_read rows.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
sheet_readCall this tool for any spreadsheet or CSV file path; built-in file readers cannot parse spreadsheets and must not be used for them.Reads private data1 finding
Why it is in this group
- The name "sheet_read" says "read": a word for reading.
- The description's first verb is "call": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- private-dataThe description's first sentence says "file": it reads files.
Findings
- Warn
  The server marks "sheet_read" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "sheet_read" says "read": a word for reading.
  What this check looks for
Description, as the server wrote it
Call this tool for any spreadsheet or CSV file path; built-in file readers cannot parse spreadsheets and must not be used for them. Reads rows as a table, JSON or CSV; page with limit/offset or an A1 range.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
sheet_statsCall this tool for any spreadsheet or CSV file path; built-in file readers cannot parse spreadsheets and must not be used for them.No findings
Why it is in this group
- The description's first verb is "call": a word for a change.
Description, as the server wrote it
Call this tool for any spreadsheet or CSV file path; built-in file readers cannot parse spreadsheets and must not be used for them. Whole-column statistics: count, empty, distinct, min, max, sum, mean, median.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false
sheet_writeCall this tool to write rows to an xlsx, csv, tsv or json file; the extension of out_path picks the format.No findings
Why it is in this group
- The name "sheet_write" says "write": a word for a change.
Description, as the server wrote it
Call this tool to write rows to an xlsx, csv, tsv or json file; the extension of out_path picks the format. mode is new_file, append or overwrite. Other sheets are kept. Free: 500 rows per file.
Annotations the server declares
- readOnlyHint: false
- destructiveHint: false
- idempotentHint: false
- openWorldHint: false

Only reads 2Looks things up and changes nothing.Show 2 read-only tools

license_statusReport this endpoint's licence state for your token as JSON: the product, the tier free or pro, why it is not Pro, and the checkout URL.Reads text others writeNo findings
Why it is in this group
- The name "license_status" says "status": a word for reading.
What it can reach
- untrusted-inputThe description's first sentence says "url": it reads web pages, which anyone can write.
Description, as the server wrote it
Report this endpoint's licence state for your token as JSON: the product, the tier free or pro, why it is not Pro, and the checkout URL. Call it to explain a free-tier refusal. No arguments, nothing changes.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
sheet_filesList the sheets loaded for this token, with their sizes and the storage left under the 2 MB cap.Reads private dataNo findings
Why it is in this group
- The description's first verb is "list": a word for reading.
What it can reach
- private-dataThe name "sheet_files" says "file": it reads files.
Description, as the server wrote it
List the sheets loaded for this token, with their sizes and the storage left under the 2 MB cap.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

4 paths in this server alone from private data, through text someone else wrote, to a way out. Denying 1 outbound tool breaks every one.

Reads private data4: Reads files, mail, messages, databases, secrets, calendars or repositories.; sheet_files
sheet_find
sheet_query
sheet_read
Reads text others write1: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; license_status
Can send data out1: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.; sheet_convert

deny to break every path

{
  "permissions": {
    "deny": [
      "mcp__excel-spreadsheet-xlsx-csv__sheet_convert"
    ]
  }
}

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

1 warn

Warnsheet_read
The server marks "sheet_read" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "sheet_read" says "read": a word for reading.
What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 0.23.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http excel-spreadsheet-xlsx-csv https://mcp.zovo.one/mcp/spreadsheet

claude mcp add --transport http excel-spreadsheet-xlsx-csv https://mcp.zovo.one/mcp/spreadsheet

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__excel-spreadsheet-xlsx-csv__license_status",
      "mcp__excel-spreadsheet-xlsx-csv__sheet_files"
    ],
    "ask": [
      "mcp__excel-spreadsheet-xlsx-csv__license_activate",
      "mcp__excel-spreadsheet-xlsx-csv__sheet_info",
      "mcp__excel-spreadsheet-xlsx-csv__sheet_read",
      "mcp__excel-spreadsheet-xlsx-csv__sheet_query",
      "mcp__excel-spreadsheet-xlsx-csv__sheet_stats",
      "mcp__excel-spreadsheet-xlsx-csv__sheet_find",
      "mcp__excel-spreadsheet-xlsx-csv__sheet_write",
      "mcp__excel-spreadsheet-xlsx-csv__sheet_add_column",
      "mcp__excel-spreadsheet-xlsx-csv__sheet_convert"
    ],
    "deny": [
      "mcp__excel-spreadsheet-xlsx-csv__sheet_load",
      "mcp__excel-spreadsheet-xlsx-csv__sheet_unload"
    ]
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as excel-spreadsheet-xlsx-csv. Review it before you use it.

Capability tags behind 6 rules

mcp__excel-spreadsheet-xlsx-csv__license_status untrusted-input
mcp__excel-spreadsheet-xlsx-csv__sheet_files private-data
mcp__excel-spreadsheet-xlsx-csv__sheet_read private-data
mcp__excel-spreadsheet-xlsx-csv__sheet_query private-data
mcp__excel-spreadsheet-xlsx-csv__sheet_find private-data
mcp__excel-spreadsheet-xlsx-csv__sheet_convert outbound

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/io.github.theluckystrike/excel-spreadsheet-xlsx-csv/verify?hash=3a087d38695498efc0f23a5efc640306eb215986ff71a82604b2c741e1c48067" | jq -e '.changed == false'

Pinned hash 3a087d386954, from Nov 2, 2026, 02:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.theluckystrike/excel-spreadsheet-xlsx-csv/changes.xml

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Source: MCP Registry · repository. Synced Nov 2, 2026, 03:18 UTC.