A
B
C
D
1
Number
Unit price
Total
2
Seats
30
$49
$1,470
3
Support
No
$700
$0
4
5
Total price
$1,470
Request
{
"apply": [
{
"target": "B2",
"value": 30
},
{
"target": "B3",
"value": "No"
}
],
"read": [
"C2",
"D5"
]
}
Response
[
{
"source": "C2",
"data": {
"t": "n",
"v": 49,
"w": "$49",
"z": "$#,##0"
}
},
{
"source": "D5",
"data": {
"t": "n",
"v": 1470,
"w": "$1,470",
"z": "$#,##0"
}
}
]

Spreadsheets as APIs

Turn spreadsheets into powerful web services

Our environment ensures full compatibility with Excel and Google Sheets, running your models seamlessly in the cloud, transforming spreadsheets into flexible RESTful web services for easy integration into your applications.

Work with confidence

Recalculations without permanent writes

Once you upload your spreadsheet to our API, it’s kept separate from ongoing calculations. This lets you adjust inputs and test various outcomes, knowing your original data is preserved. Integrate the data and logic of existing spreadsheets into your applications, letting business users maintain them while you focus on building the application.

Built for AI

Optimized for AI integrations

Large language models excel at text but struggle with calculations. GRID turns your spreadsheets into web services, seamlessly integrating complex models into AI and LLM projects. This enables reliable, dynamic responses - that can even be accessed using natural language.

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Learn more

How compatible are the calculations to Excel and Google Sheets?

GRID's spreadsheet engine is the most sophisticated such engine outside Microsoft and Google and even rivals them on several fronts. This document details the compatibility and offers comparison to other engines in the market.
The engine has been powering our Calculator Studio product since 2021, running tens of thousands of models built in traditional spreadsheet software, many of them very complex and often requiring "animation speed" calculations.
You can follow these links to read about our function and operator support specifically.

What are the primary use cases for the GRID API?

The GRID API enables seamless integration of complex spreadsheet calculations into various applications. It allows Custom GPTs to access spreadsheet models for reliable calculations in areas like sales, HR, and finance. It also enhances customer service by enabling chatbots to deliver accurate, real-time calculations, such as price quotes. Additionally, it empowers developers to convert spreadsheets into APIs, speeding up software development without the need to rebuild existing calculations.

How can I verify the calculations from GRID?

GRID ensures precise and dependable calculations, and we've made it possible to ask GPTs to explain their calculations. To build trust and transparency, you can enable GRID-powered GPTs to explain their calculations directly. This feature, designed for debugging and internal use, provides step-by-step details of how results are derived. By default, this capability is off, offering control over whether to display calculations, especially for external users.

Can I connect a spreadsheet from Google Sheets to GRID and keep it in sync?

Yes. Changes to a connected spreadsheet will automatically update in GRID and your GPT via cloud integration. There’s no need to re-upload or replace the file!

Can I call the GRID API from a Custom GPT?

Yes, you can! We provide an Open API schema compatible with Custom GPTs. Using the GRID API with Custom GPTs is perfect for internal use across sectors: sales and marketing teams can run pricing models and ROI calculations, HR can manage benefit and bonus calculations, financial advisors can handle retirement and mortgage planning, and legal teams can incorporate calculations into their drafts—all with reliable, verifiable results from your existing spreadsheets.

blog

14.03.2025

Build a simple loan calculator API with GRID Python SDK

Harness the power of Excel to do the heavy lifting — use formulas to calculate values within a complicated data model, all in a few lines of code.

Atli Páll Hafsteinsson

Atli Páll Hafsteinsson

Read more

RESTful API ready to be queried in minutes

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Convert your spreadsheets to web services and integrate calculations to any software, workflow or AI project.

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