Your workbook. A specialized assistant.

Less spreadsheet work.
More answers.

Turn plain-language requests into formulas, charts and workbook changes with Excel AI. Connect your Excel add-in or build with the OpenAI-compatible API.

Connect your clientExplore the API

Work inside Excel

The ExcelAI add-in uses a local helper to run workbook tools. Set its cloud endpoint to https://excel.malcolmstone.io, select excel-v3, and supply your Excel AI API token.

Build your own workflow

Use streaming completions and tool calls through /v1/chat/completions. Connect MCP clients to /mcp for Excel model chat, discovery and status.

Connect your client

Sign in with your provisioned Excel AI account through POST /api/v1/auth/signin, then create an API token through POST /api/v1/tokens. See the API specification for the request fields. Public registration is not enabled.

curl https://excel.malcolmstone.io/v1/chat/completions \
  -H "Authorization: Bearer $EXCEL_AI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"excel-v3","messages":[{"role":"user","content":"Write a formula to sum A2:A10."}],"stream":true}'

Workbook tools run in your local client. Prompts, selected workbook context and tool results are sent to the model to produce its response.