Is Capital One supported?

Yes. Capital One connects securely through Plaid, so you can link your accounts and start syncing in minutes.

How often does Capital One sync to Zerosum?

Syncs are event-driven: Plaid notifies Redbark when new Capital One data is available, and your Zerosum updates soon after, typically within a few hours of a transaction posting.

Is my Capital One connection read-only?

Yes. Plaid connections are read-only. Redbark can read transactions and balances, and can never move money or change your Capital One accounts.

Does Redbark store my Capital One data?

No. Redbark uses a pass-through architecture: your Capital One transactions are proxied live to Zerosum. We store consent records, encrypted tokens and minimal account metadata, never transaction amounts, descriptions or balances.

Is Redbark independently security tested?

Yes. Redbark was penetration tested in July 2026 by Project Black, a CREST-accredited Australian security firm, covering the web app, REST API, MCP server and admin console. The test returned zero critical and zero high-risk findings, and every finding raised was remediated and confirmed closed on retest.

Which Zerosum plan supports Capital One sync through Redbark?

Zerosum’s bring-your-own-provider bank sync is included with Plus and Pro, including the Pro trial. Redbark Developer is 30% off while your Zerosum connection stays active.

Will Zerosum duplicate my Capital One transactions?

Zerosum runs SimpleFIN imports through its normal review, matching and duplicate-prevention flow. You control which Capital One provider accounts are linked to each budget account.

United States · Zero-based budgeting

Sync Capital One to Zerosum

Sync Capital One transactions into Zerosum over Plaid. Redbark serves your accounts through SimpleFIN, which Zerosum supports as a bring-your-own bank sync provider.

Connect Capital One free See pricing

No credit card required

Checking Account

Capital One

Savings Account

Capital One

Credit Card

Capital One

Household Budget

Account: Everyday

SyncingLast synced: 2 min ago

Zero-based budgeting

Capital One transactions, ready to budget in Zerosum

Zerosum pulls Capital One accounts, balances and transactions from Redbark over SimpleFIN. Link each provider account to your budget, then review and match imported transactions with duplicate prevention built in.

Get started

Sync Capital One to Zerosum in three steps

Connect Capital One

Link your Capital One accounts to Redbark through Plaid, then generate a SimpleFIN setup token in Settings → API & MCP.

Connect SimpleFIN in Zerosum

In Zerosum, open Bank Sync, choose Connect SimpleFIN, and paste your one-time Redbark setup token. Zerosum claims it and encrypts the resulting credential.