An API endpoint
Update the workbook — the API follows.
Start free trialRun your Excel model from code — without rewriting it.
Check your workbook privately in the browser. Upload it separately to the hosted API to call the model from code.
No workbook at hand?
What do you need?
A web form
A calculator page to share or embed.
Bulk scenarios
Thousands of input sets in one request.
Start free trialWhy not rewrite it?
One source of truth
The model stays in Excel with its owner.
Milliseconds
Per scenario.
No surprises
Every difference from Excel shown before you ship.
Early access pricing
No sales call.
Developer
$49/mo
- 3 models
- 50,000 scenarios a month
Team
$199/mo
- 15 models
- 500,000 scenarios a month
Business
$499/mo
- 50 models
- 5 million scenarios a month
Start with a 14-day free trial: 1 model, 1,000 scenarios, no card.
FAQ
What is WorkbookAPI?
WorkbookAPI runs your Excel model as an API or a batch of scenarios. Check it in your browser first, then upload it to the API. The model owner keeps editing in Excel. Web forms are on the waitlist.
Does my workbook leave my browser?
The browser check never sends your workbook, values, formulas or names. Using the hosted API is a separate upload to our server. We store the workbook to calculate your scenarios, but do not store scenario input or output values. Privacy policy.
What is supported?
Most Excel formulas, including dynamic arrays and LAMBDA. Macros, Power Query and pivot tables are not run — the report flags them.
Why are some formulas not compared?
Volatile functions like TODAY, links to other files and cells without a saved Excel result are skipped.
When can I use it?
Start a 14-day free trial with 1 model and 1,000 scenarios, no card. Change your plan in the dashboard. Follow the quickstart.