microsoft-excel by @acedatacloud

Drive live Excel workbooks via the Microsoft Graph workbook API with curl + jq. The user's OAuth bearer token is in $MICROSOFT_EXCEL_TOKEN; every call needs Authorization: Bearer $MICROSOFT_EXCEL_TOKEN. Base URL: https://graph.microsoft.com/v1.0. The workbook API operates on a drive item (an .xlsx in OneDrive/SharePoint), so you need its ITEM_ID.

Failures are {"error":{"code","message"}} — show message verbatim. 401 = token expired (re-install). 403 on a write = the user granted read-only.

G="https://graph.microsoft.com/v1.0"; AUTH="Authorization: Bearer $MICROSOFT_EXCEL_TOKEN"
# Find the workbook by name (then take .id as ITEM_ID)
curl -sS -H "$AUTH" "$G/me/drive/root/search(q='budget.xlsx')" \
  | jq '.value[] | {id, name, webUrl}'
# Worksheets in the workbook
curl -sS -H "$AUTH" "$G/me/drive/items/ITEM_ID/workbook/worksheets" \
  | jq '.value[] | {id, name, position}'

Read & write ranges

ITEM="ITEM_ID"; WS="Sheet1"
# Used range (values + formulas + formats)
curl -sS -H "$AUTH" \
  "$G/me/drive/items/$ITEM/workbook/worksheets/$WS/usedRange" \
  | jq '{address, values: .values}'

# Read a specific range
curl -sS -H "$AUTH" \
  "$G/me/drive/items/$ITEM/workbook/worksheets/$WS/range(address='A1:C5')" | jq '.values'

# Update a range (confirm first). values is a 2-D array matching the address shape.
curl -sS -X PATCH -H "$AUTH" -H "Content-Type: application/json" \
  -d '{"values":[["Q3",1200],["Q4",1580]]}' \
  "$G/me/drive/items/$ITEM/workbook/worksheets/$WS/range(address='A2:B3')" | jq '.address'

Append a row to a table

curl -sS -X POST -H "$AUTH" -H "Content-Type: application/json" \
  -d '{"values":[["2026-06-21","Acme",4200]]}' \
  "$G/me/drive/items/$ITEM/workbook/tables/Table1/rows/add" | jq '.index'

Gotchas

This is for cloud workbooks (OneDrive/SharePoint). A local .xlsx the user uploaded into chat is a different job (parse the file directly), not this skill.
Range address is a string like Sheet1!A1:C5 or just A1:C5 when scoped to a worksheet; values must be a 2-D array matching its dimensions.
For long-running edits Graph supports a workbook session header (workbook-session-id); for a few cells the default sessionless mode is fine.