Learn how to display the latest value of any CoinAPI crypto index (e.g. BTC Volatility, Market Cap, or DeFi Index) directly in Google Sheets, all without writing a single line of code.

Overview

In this short guide, you’ll:

1. Get your CoinAPI key
2. Prepare your Google Sheet
3. Make one API call (hidden helper column)
4. Extract and format the output
5. Keep it auto-refreshing

Skill level: Beginner

Estimated Time: 5 - 10 minutes

Tools: Google Sheets, web browser, CoinAPI account

Prerequisite: Get Your API Key

Before starting this tutorial, make sure you have a valid API key.

👉 Getting Started: How to Create Your API Key

Once you have your API key ready, continue to Step 1 below.

Step 1: Set Up Your Spreadsheet

1. Open Google Sheets
2. Create a blank spreadsheet
3. Rename it Crypto Index Tracker
4. In row 1, add these headers:

Step 2: Understand the Endpoint

CoinAPI’s /current The endpoint provides the most recent index value for any index ID.

Example endpoint:

1<https://rest-api.indexes.coinapi.io/v1/indexes/IDX_VOL_CAPIVIX_BTC_USD/current?apikey=YOUR_API_KEY>

🔗 Full documentation can be accessed here: https://docs.coinapi.io/indexes-api/rest-api/current-index-value

Step 3: Import Once + Extract Fields (Final Version)

Your API response looks like this inside Google Sheets:

1{
2timestamp: "2025-11-04T14:19:37"
3value: 48.862212114794
4}

These appear on separate rows (D2–D5).

We’ll join those rows, then extract the timestamp and value.

In A2

Enter the index ID you want to track:

1IDX_VOL_CAPIVIX_BTC_USD

In D2 (Hidden Helper Column)

Paste this one-time API call:

1=IMPORTDATA("<https://rest-api.indexes.coinapi.io/v1/indexes/>" & A2 & "/current?apikey=YOUR_API_KEY")

In B2 (Timestamp)

Merge all lines into one text string and extract the timestamp field:

1=REGEXEXTRACT(TEXTJOIN("", TRUE, D2:D5), "timestamp:\\s*""([^""]+)""")

In C2 (Value)

Use the same method to extract the numeric value:

1=REGEXEXTRACT(TEXTJOIN("", TRUE, D2:D5), "value:\\s*([0-9.E+-]+)")

Why It Works

✅ Only one API call occurs (the IMPORTDATA in D2).
Columns B and C simply read data from that hidden helper cell.

This is what the final result would look like. You may hide column D accordingly.

Step 4: Format

1. Hide Column D → right-click D → Hide column
2. Format C2 (Value) → Format → Number → Number (or Currency)
3. Freeze header row → View → Freeze → 1 row
4. Optional: duplicate row 2 for other index IDs (e.g. IDX_PRICE_BTC_USD, IDX_PRICE_ETH_USD).

Final Result

Each index row:

• Calls CoinAPI once
• Displays a clean timestamp and value
• 100 % no code