tech.basis1/mcp

up checked 2026-11-11T05:39:24.795Z

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Publisher-provided title

Basis

Publisher-provided description

The Excel engine for AI agents: read, check and edit Excel models over MCP.

Summary by lookupd

Lets agents open, read, edit, recalculate, audit and export Excel workbooks, run what-if scenarios and compare .xlsx files.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http mcp https://api.basis1.tech/mcp

Claude Code, npm package (stdio)

claude mcp add mcp -- npx -y @basis1/mcp

Codex, remote (streamable-http)

codex mcp add mcp --url https://api.basis1.tech/mcp

Codex, npm package (stdio)

codex mcp add mcp -- npx -y @basis1/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "mcp": {
      "url": "https://api.basis1.tech/mcp"
    }
  }
}

Cursor, npm package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@basis1/mcp"
      ]
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (26 tools)

Publisher-provided text

• parse_workbook Parse an .xlsx workbook in one call and return its full semantic NDJSON: one JSON record per line (workbook_meta, sheet, cell, edge, image, image_summary, audit
• submit_job Start an async parse of an .xlsx workbook and return at once with a job handle {job_id, status: "processing", status_url, stream_url}. Use it instead of parse_w
• stream_job Check on or read a parse job started by submit_job. By default it returns the job's NDJSON records once it has completed: the same output parse_workbook returns
• diff_workbooks Compare two .xlsx files cell by cell and return the differences as JSON: {summary, added, removed, changed, format_changed}. Cells are matched on (sheet title,
• evaluate_formula Evaluate an Excel formula locally and return the computed result: a quick way to check what a formula returns on a few sample values before you put it in a work
• create_session Open a workbook in a session that the other workbook tools then use by session_id: the starting point for reading, editing, recalculating and exporting a model.
• close_session End a session and discard its workbook: the session_id stops working and the session can't be reopened. Edits not saved with save_to_library (or downloaded with
• list_sessions List the sessions open for this API key, to recover a session_id you've lost or to see how many are open before create_session. Returns {sessions: [{id, documen
• add_sheet Add an empty sheet at the end of a session's workbook and make it the active sheet (the one unqualified refs like "B4" point to). Only for sessions created blan
• rename_sheet Rename a sheet in a session's workbook, found by its 0-based index (see the sheets list from create_session or inspect_model). Formulas, named ranges and valida
• delete_sheet Delete a sheet from a session's workbook, found by its 0-based index (see the sheets list from create_session or inspect_model), the way Excel does: formulas on
• set_inputs Write values or formulas into cells of a session and recalculate: the way to run a scenario on a model ("what if Revenue is 1.2M?"). Keys are defined names (e.g
• set_calc_settings Turn iterative calculation on or off for a session and recalculate. Needed for circular models (e.g. development pro formas where loan size depends on cost, whi
• get_outputs Read computed values from a session by defined name, cell or range: the way to check what a model's formulas return, e.g. after set_inputs. Pass names as define
• define_variable Create a defined name for a cell, or repoint an existing one, so set_inputs and get_outputs can use a readable key ("Revenue") instead of a cell ref. A name tha
• delete_variable Delete a defined name from a session's workbook, e.g. one you made with define_variable and no longer need. Only the name goes; the cell it pointed to keeps its
• inspect_model Summarize a session's structure: each sheet's index, name and used rows and columns, every defined name with its target, the iterative-calc settings, and counts
• export_workbook Get a session's workbook back as an .xlsx file with every formula's computed value saved in it. Recalculates first. Call this when you need the file itself: to
• recalc_workbook Recalculate an .xlsx file and return it with the computed values saved in every formula cell. Use this after you create or edit a workbook with openpyxl or any
• get_formula_range Read the formulas and computed values of one cell or a rectangular range in a session: the way to check what a cell or a block of cells computes. Pass a single
• commit_session Create a named checkpoint of the session's current state, e.g. before a risky edit. Returns {commit_id, message, total_commits}; pass commit_id to restore_sessi
• restore_session Roll a session back to a checkpoint from commit_session: every cell edit made after it is undone, calc settings included, and the workbook is recalculated. Use
• trace_dependencies Follow formula references from one cell in a session, breadth first, up to depth levels (1-5): direction "precedents" walks to the cells it reads, "dependents"
• audit_workbook Check a session's whole workbook for modeling problems and return a JSON report: broken references, circular references and whether they converge, hardcoded plu
• save_to_library Save the session's workbook to the user's Library for durable storage. If the session was loaded from the Library or was previously saved, this creates a new ve
• list_library_files List the workbooks in the user's Library: the files this account owns, newest-updated first, including everything save_to_library saved. Use it to find a librar

Details

• Version: 0.3.1
• Transports: streamable-http, stdio
• Uptime (7 days): 100%
• Median latency: 165 ms
• First indexed: 2026-11-04T01:17:12.916Z
• Last seen in registry: 2026-11-07T18:17:32.321Z
• Repository: https://github.com/basis1tech/basis-oss
• Website: https://basis1.tech

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