Put your Excel rater behind a broker quote portal.
WorkbookAPI checks your Excel rater in the browser for free, with an API for your broker quote portal planned for early access. Your actuary keeps the model in Excel.
Check your workbook — free, it never leaves your browser
The rater works. Quotes still need a person.
At an MGA, insurtech, or program administrator, a quote request often starts with an email. Someone enters the details in Excel and sends a premium back. A rate change means checking which workbook everyone uses.
Why the usual options hurt
Rewriting the rater creates two versions of the rules. Developers must copy every change the actuary makes. Running Excel on a server adds another system to maintain. Manual quoting keeps brokers waiting.
How it works with WorkbookAPI
Drop the rater into the free browser check. See which formulas compute exactly like Excel and review any differences.
The check compares calculated results with results saved by Excel for the current inputs. Recalculate and save the workbook in Excel first.
Today, only the browser check is live. A rating API is planned for early access; join the waitlist on the home page.
The planned API will take quote inputs and return the workbook's outputs. The actuary keeps the model in Excel. Updating the workbook will update the quote calculation.
Illustration: a small commercial insurance quote
A broker portal could pass these inputs to a checked rating model.
- Inputs: Ohio, landscaping, $500,000 annual payroll, and a $1 million coverage limit.
- Outputs: Annual premium, deductible options, and a referral flag from the workbook's rules.
This illustrates a calculation flow, not a customer quote or a live portal.
What is not supported
Macros/VBA, Power Query, pivot tables, what-if data tables, and links to other workbooks are not supported. Strict Open XML files are also unsupported. The report flags them.
FAQ
Can I turn an Excel rater into a broker quote portal?
That is the planned use. The portal interface would be your application.
Who changes the insurance rating model?
The actuary keeps editing the model in Excel. The planned API will use the updated workbook, so developers do not maintain a separate copy of the rating formulas.
Does a matching check validate every insurance quote?
No. The check compares formula results for the workbook's saved inputs. Review differences and test representative quote cases before using a model in a product.
Does my rater leave my browser during the check?
No. The workbook never leaves your browser during the check. Only anonymous totals are counted, never values, formulas, or file names.
Read the privacy policy.
Start with your workbook
Check your workbook — free, it never leaves your browser
For the developer workflow, see calculating Excel formulas from code.