Excel MCP Server (FsOpenXmlDsl)
OfficialServer Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Features and capabilities supported by this server
Protocol revision2025-11-25
| Capability | Details |
|---|---|
| tools | {
"listChanged": true
} |
| logging | {} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| generate_fsharp_scriptA | Reads an existing Excel workbook and returns a self-contained F# script (using Kookerella.FsOpenXmlDsl) that rebuilds an equivalent file when run via |
| generate_json_schemaA | Returns the raw JSON Schema (Json.schema.json) that generate_json's output and create_workbook_from_json's input both conform to. Meant for a caller authoring JSON by hand or by a generation script who wants real schema validation/autocomplete in their own editor or pipeline, rather than reverse-engineering the shape from a generate_json example. This schema isn't validated against at runtime by the core library itself the way Xml.xsd is (JSON Schema has no .NET-built-in equivalent to System.Xml.Schema, so wiring that up would mean adding a runtime dependency - JsonSchema.Net - to every consumer of the core library just for this) - it's bundled here, in the Mcp tool specifically, purely to hand back on request. |
| generate_csharp_scriptA | Reads an existing Excel workbook and returns a self-contained C# file (using Kookerella.CsOpenXmlDsl) that rebuilds an equivalent file when run via |
| create_workbook_from_jsonA | Builds a new Excel workbook from JSON matching the shape generate_json produces (see the main library repo's Json.schema.json) and saves it to disk - the inverse of generate_json. The JSON-side equivalent of create_workbook_from_xml, for a caller that already produces data as JSON and wants to reach Excel without learning the OOXML schema or this library's own F#/C# API. Covers the same worksheet/workbook-level feature set generate_json does; unlike create_workbook, this isn't limited to plain cell values - styling, tables, charts, and every other modeled feature can be expressed in the JSON. |
| generate_jsonA | Reads an existing Excel workbook and returns it as JSON. The JSON-side equivalent of generate_xml, for a caller whose tooling speaks JSON rather than XML - same use cases (inspect, transform, or archive a workbook's structure without any F#/C# source involved) and the same worksheet/workbook- level feature set. Unlike generate_xml, there's no runtime JSON Schema validation built into the core library itself (see generate_json_schema's own doc string for why) - but generate_json_schema still returns the documented shape this produces. |
| create_workbook_from_xmlA | Builds a new Excel workbook from XML matching Kookerella.FsOpenXmlDsl's own embedded schema (Xml.xsd) and saves it to disk - the inverse of generate_xml. The natural target for a caller that already produces data as XML (e.g. an XSLT pipeline generating a report) and wants to reach Excel without learning the OOXML schema or this library's own F#/C# API. Covers the same worksheet/workbook-level feature set generate_xml does; unlike create_workbook, this isn't limited to plain cell values - styling, tables, charts, and every other modeled feature can be expressed in the XML. |
| generate_xmlA | Reads an existing Excel workbook and returns it as XML, validated against Kookerella.FsOpenXmlDsl's own embedded schema (Xml.xsd). A plain-data alternative to generate_fsharp_script/generate_csharp_script for a caller who wants to inspect, transform (e.g. via XSLT), or archive a workbook's structure without any F#/C# source involved - unlike those two, this returns data, not a runnable script, so there is no output-filename parameter to control what a rebuild saves as. Covers the same worksheet/workbook-level feature set generate_fsharp_script does. |
| generate_xml_schemaA | Returns the raw XSD (Xml.xsd) that generate_xml's output and create_workbook_from_xml's input both conform to. Meant for a caller authoring XML by hand or by transform (e.g. an XSLT stylesheet) who wants real schema validation/autocomplete in their own editor or pipeline, rather than reverse- engineering the shape from a generate_xml example. |
| read_workbookA | Reads an existing Excel workbook (.xlsx/.xlsm) and returns its sheets and cell contents as JSON. Formula cells are rendered as "=expression" (matching create_workbook's input convention), with any cached value included separately under CachedValue. Features outside the core cell model (charts, tables, pivot tables, styling, etc.) are not included in this output - see MAPPING.md in the main library repo for the full list of what round-trips. |
| create_workbookA | Creates a new Excel workbook (.xlsx) from a simple grid of sheets/rows/cells and saves it to disk. Each cell is given as plain text, the same way you'd type it into Excel: a leading '=' makes it a formula (e.g. "=SUM(A1:A2)"), 'true'/'false' makes a boolean, a bare number is numeric, and anything else is text. Rows don't need to be the same length. Does not support cell styling, tables, charts, or pivot tables in this version - reference the Kookerella.FsOpenXmlDsl library directly for those. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
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