The Scenario
You run a crypto fund with positions across 50 Ethereum validators. Every Monday morning you pull the previous week's balance data to calculate cumulative yield and flag any underperformers before the weekly investor update. The data lives on beaconcha.in. The analysis lives in a Google Sheet. The space between them is currently your problem.
The bad version:
- Open beaconcha.in, search for validator index 1, copy the balance table, paste into the sheet, fix the column alignment
- Repeat 49 more times across a 90-epoch range, checking each time that the epoch numbers line up
- Discover that three validators returned data in a different column order and repair the misalignment before the formula picks up the wrong balance
The fund's Monday update doesn't move. You have a fixed window to get this done, and rebuilding rows from a web UI one validator at a time is not something you can outsource or automate at the last minute.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent that lives directly inside your Google Sheet. It reads your validator indices in column A, understands that you need epoch-level balance data, and talks to Beaconchain on your behalf. No API configuration, no copy-pasting, no column realignment.
Fetch Beaconchain balance history for all validator indices listed in column A of my Validators sheet and write epoch number, effective balance, and total balance for each validator into separate column groups starting at column C — use the last 90 epochs
What You Get
- One column group per validator, labeled with the validator index in the header row
- Three columns per group: epoch number, effective balance in gwei, and total balance in gwei
- All 50 validators written in a single pass — no partial results from rate limit errors
- Any validator index that returns an error gets a note in its header cell so you can investigate without losing the rest of the data
What If the Data Is Not Quite Ready
The epoch range doesn't match your yield formula anchors
Fetch Beaconchain balance history for all validator indices in column A of my Validators sheet — pull epochs 250000 through 250090 specifically — and write epoch, effective balance, and total balance starting at column C with validator index as the header
Some validators in column A haven't activated yet
Fetch Beaconchain balance history for all validator indices in column A of my Validators sheet — skip any index that returns no data or a not-yet-active status, note skipped indices in a Skip Log tab, and write the rest starting at column C
You need the balance in ETH, not gwei, for the yield formula
Pull Beaconchain balance history for all validator indices in column A — last 90 epochs — convert all effective balance and total balance values from gwei to ETH by dividing by 1000000000, and write into column groups starting at column C
You need the balance delta per epoch plus a cumulative yield column added inline
Fetch Beaconchain balance history for validator indices in column A — last 90 epochs — write epoch, effective balance, total balance, and epoch-over-epoch balance delta for each validator in separate column groups starting at column C, then add a cumulative yield row at the bottom of each group
SheetXAI can combine the data pull, the unit conversion, and the derived calculations in a single instruction rather than running them as separate steps.
Try It
Get the 7-day free trial of SheetXAI and open your validator tracking sheet — drop your 50 indices into column A and ask SheetXAI to pull the last 90 epochs of balance history. You'll also want to look at the spoke on pulling income breakdowns for tax reporting, and the hub overview covers all the ways SheetXAI connects to Beaconchain.