gantt-chart
Build Gantt charts from your AI chat: tasks, dependencies, timeline spreadsheets. All data is local.
Should I use this
Quality & Safety
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"gantt-chart": {
"command": "uvx",
"args": [
"https://github.com/theluckystrike/mcp-servers/releases/download/v0.22.0/spreadsheet.mcpb"
]
}
}
}Runnable packages
0.22.0stdioRemote endpoints
https://mcp.zovo.one/mcp/gantt-chartstreamable-httpWhat it can do
Tool inventory
Tools (13)
🟢license_status
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.
Input Schema
{
"type": "object",
"properties": {},
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪license_activate(key)
Turn Pro on for this connection with key, an MCPL1.<payload>.<signature> issued at checkout for this server or the bundle. Data under your token stays; a wrong or expired key changes nothing. license_status confirms it.
Input Schema
{
"type": "object",
"properties": {
"key": {
"type": "string",
"description": "License key from checkout, MCPL1.<payload>.<signature>"
}
},
"required": [
"key"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟡sheet_load(name, csv, xlsx_base64, url)
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.
Input Schema
{
"type": "object",
"properties": {
"name": {
"type": "string",
"minLength": 1,
"maxLength": 70,
"description": "Name to refer to this data by: 1-64 characters of letters, digits, underscore or dash, e.g. \"sales\" or \"sales.csv\""
},
"csv": {
"type": "string",
"description": "Raw CSV or TSV text, including the header row"
},
"xlsx_base64": {
"type": "string",
"description": "Base64-encoded .xlsx workbook"
},
"url": {
"type": "string",
"description": "url: fetch a public file instead of pasting base64 (recommended above about 10 KB). Public http(s) only; private, link-local and this endpoint's own zone are refused"
}
},
"required": [
"name"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢sheet_files
List the sheets loaded for this token, with their sizes and the storage left under the 2 MB cap.
Input Schema
{
"type": "object",
"properties": {},
"$schema": "http://json-schema.org/draft-07/schema#"
}🔴sheet_unload(name)
Delete one sheet loaded for this token, freeing its space under the 2 MB cap.
Input Schema
{
"type": "object",
"properties": {
"name": {
"type": "string",
"minLength": 1,
"maxLength": 70
}
},
"required": [
"name"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢sheet_info(path)
Call this tool for any spreadsheet or CSV file path; built-in file readers cannot parse spreadsheets and must not be used for them. Start here: sheet names, size, header row, column types and samples.
Input Schema
{
"type": "object",
"properties": {
"path": {
"type": "string",
"description": "Path to the .xlsx/.xlsm/.xlsb/.ods/.csv/.tsv file (~ is expanded)"
}
},
"required": [
"path"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢sheet_read(path, sheet, range, limit, offset, ...)
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.
Input Schema
{
"type": "object",
"properties": {
"path": {
"type": "string"
},
"sheet": {
"type": "string",
"description": "Sheet name; defaults to the first sheet"
},
"range": {
"type": "string",
"description": "A1 range such as A1:D50; overrides limit/offset"
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 100000,
"description": "Rows to return, default 100"
},
"offset": {
"type": "integer",
"minimum": 0,
"description": "Rows to skip, default 0"
},
"as": {
"type": "string",
"enum": [
"table",
"json",
"csv"
],
"description": "Output format, default table"
}
},
"required": [
"path"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢sheet_query(path, sheet, where, select, group_by, ...)
Call this tool for any spreadsheet or CSV file path; built-in file readers cannot parse them. Filters, groups, aggregates and sorts in one call. Totals: aggregate/group_by here, never hand sums over sheet_read rows.
Input Schema
{
"type": "object",
"properties": {
"path": {
"type": "string",
"description": "Path to the .xlsx or .csv file"
},
"sheet": {
"type": "string"
},
"where": {
"type": "string",
"description": "Filter, e.g. [Qty] >= 5 AND ([Status] = \"open\" OR [Status] = \"new\")"
},
"select": {
"type": "array",
"items": {
"type": "string"
},
"description": "Column names to return; default all (with group_by, defaults to the group columns plus the aggregates)"
},
"group_by": {
"type": "array",
"items": {
"type": "string"
},
"description": "Group rows by these columns before aggregating, e.g. [\"Rep\"] or [\"Region\",\"Rep\"]"
},
"aggregate": {
"type": "array",
"items": {
"type": "object",
"properties": {
"col": {
"type": "string",
"description": "Column to aggregate, or \"*\" to count rows"
},
"fn": {
"type": "string",
"enum": [
"sum",
"count",
"avg",
"min",
"max"
],
"description": "sum | count | avg | min | max"
},
"as": {
"type": "string",
"description": "Output name for this aggregate, e.g. total_units"
}
},
"required": [
"col",
"fn"
],
"additionalProperties": false
},
"description": "Aggregates per group, e.g. [{\"col\":\"Units\",\"fn\":\"sum\",\"as\":\"total_units\"}]. Defaults to a row count when group_by is given."
},
"sort": {
"type": "object",
"properties": {
"col": {
"type": "string"
},
"dir": {
"type": "string",
"enum": [
"asc",
"desc"
]
}
},
"required": [
"col"
],
"additionalProperties": false,
"description": "Sort column; may be an aggregate alias such as total_units"
},
"limit": {
"type": "integer",
"minimum": 1,
"maximum": 100000,
"description": "Default 100"
},
"as": {
"type": "string",
"enum": [
"table",
"json",
"csv"
]
}
},
"required": [
"path"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢sheet_stats(path, sheet, columns)
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.
Input Schema
{
"type": "object",
"properties": {
"path": {
"type": "string"
},
"sheet": {
"type": "string"
},
"columns": {
"type": "array",
"items": {
"type": "string"
},
"description": "Limit to these columns; default all"
}
},
"required": [
"path"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢sheet_find(path, text, sheet)
Call this tool to search every cell of a spreadsheet or CSV for text; built-in file readers cannot parse spreadsheets. Matching is case insensitive. Returns cell addresses with a preview of the row each hit is on.
Input Schema
{
"type": "object",
"properties": {
"path": {
"type": "string",
"description": "Path to the .xlsx/.xlsm/.xlsb/.ods/.csv/.tsv file (~ is expanded)"
},
"text": {
"type": "string",
"description": "Text to look for; matched case insensitively anywhere inside a cell. Up to 200 hits are returned"
},
"sheet": {
"type": "string",
"description": "Sheet name; default searches every sheet"
}
},
"required": [
"path",
"text"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟡sheet_write(path, sheet, rows, mode, out_path)
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.
Input Schema
{
"type": "object",
"properties": {
"path": {
"type": "string",
"description": "Source file for append/overwrite, or the intended file for new_file (~ is expanded)"
},
"sheet": {
"type": "string",
"description": "Sheet to write; default is the first sheet of the source, or \"Sheet1\" for a new file. Other sheets of an existing workbook are kept unchanged"
},
"rows": {
"type": "array",
"items": {
"anyOf": [
{
"type": "object",
"additionalProperties": {}
},
{
"type": "array"
}
]
},
"description": "Array of objects, whose keys become the headers, or an array of arrays with the header row first"
},
"mode": {
"type": "string",
"enum": [
"new_file",
"append",
"overwrite"
],
"description": "new_file writes a brand new file and refuses to clobber an existing one; append adds the rows under the existing data; overwrite replaces the file contents"
},
"out_path": {
"type": "string",
"description": "Where to write; default is a new file next to the source for new_file, or the source itself for append/overwrite. The output format follows this extension: .xlsx, .csv, .tsv or .json. An extension is required"
}
},
"required": [
"path",
"rows",
"mode"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}🟡sheet_add_column(path, sheet, name, formula, decimals, ...)
Call this tool to add a computed column and save the result to a NEW file; the source is never modified unless out_path points at it. Returns the new file path, the row count and a preview of the first rows.
Input Schema
{
"type": "object",
"properties": {
"path": {
"type": "string",
"description": "Path to the source .xlsx/.xlsm/.xlsb/.ods/.csv/.tsv file (~ is expanded); it is never modified"
},
"sheet": {
"type": "string",
"description": "Sheet name; default is the first sheet"
},
"name": {
"type": "string",
"description": "Name of the new column. It must not already exist on the sheet"
},
"formula": {
"type": "string",
"description": "Expression over the columns of each row, in the same expression language as sheet_query, e.g. \"[Qty] * [Unit Price]\" or '[Country] = \"PL\"'. Give either formula or values"
},
"decimals": {
"type": "integer",
"minimum": 0,
"maximum": 10,
"description": "Round numeric formula results to this many decimals. Default: the widest decimal count of the columns the formula reads, capped at 2 when they all hold 2 or fewer (money in, money out); otherwise no rounding beyond float cleanup"
},
"values": {
"type": "array",
"description": "Explicit values, one per data row, instead of a formula. Missing entries are left blank"
},
"out_path": {
"type": "string",
"description": "Output file; default <source>-plus-<column>.<same ext>. The source file is left untouched unless this points at it"
}
},
"required": [
"path",
"name"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}⚪sheet_convert(path, to, sheet, out_path)
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.
Input Schema
{
"type": "object",
"properties": {
"path": {
"type": "string",
"description": "Path to the source .xlsx/.xlsm/.xlsb/.ods/.csv/.tsv file (~ is expanded); it is never modified"
},
"to": {
"type": "string",
"enum": [
"csv",
"xlsx",
"json"
],
"description": "Target format; the default out_path takes this as its extension"
},
"sheet": {
"type": "string",
"description": "Sheet to convert; default is the first sheet. Only that one sheet is written"
},
"out_path": {
"type": "string",
"description": "Where to write; default is the source name with the new extension, next to the source. It must differ from the source path"
}
},
"required": [
"path",
"to"
],
"additionalProperties": false,
"$schema": "http://json-schema.org/draft-07/schema#"
}Community
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