Who it is for
Spreadsheet-heavy analysts and operations staff who write formulas often enough to run into edge cases.
Spreadsheet formulas, SQL, regex, and scripting help
Overview
Formula Genius works on the expression layer of spreadsheets and the tools around them. For Excel and Google Sheets it writes formulas, explains what an existing one does, tracks down the fault in one that misbehaves, checks correctness, and sets two approaches side by side.
Its range extends past worksheet functions to SQL, regular expressions, VBA macros, and scripts for Google Apps Script and Airtable.
Examples in the record cover the debugging case, a VLOOKUP returning a reference error, a plain description of a lookup to be turned into a formula, and a PostgreSQL query totalling revenue by customer. The description stresses results that can be read and checked before they go into a sheet.
Spreadsheet-heavy analysts and operations staff who write formulas often enough to run into edge cases.
Comparison and validation of existing formulas are covered alongside the writing of new ones.
Availability
Formula Genius is listed in the ChatGPT apps directory only. Dexium Labs LLC has no connector under the same domain in the Claude directory; 392 of the 3,150 products here are on both marketplaces, and this is not one of them.
ChatGPT apps are built on MCP, and the same server can back a Claude connector, so the absence is a distribution decision rather than a technical one.
ChatGPT listing
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This is an independent catalogue entry compiled by Node8 from Formula Genius's public marketplace listing as it stood in August 2026. Listing facts come from the marketplaces; the comparisons against the rest of the directory and any live-endpoint measurements are Node8's. Node8 is not affiliated with Dexium Labs LLC, and inclusion here is not an endorsement.
Node8 builds MCP servers end to end: deciding which tools are worth exposing, the authentication and permission model, the review submissions, and the onboarding that gets them used. One server serves ChatGPT, Claude, and Microsoft Copilot.