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 Firefly III?

Syncs are event-driven: Plaid notifies Redbark when new Capital One data is available, and your Firefly III 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 Firefly III. 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.

Do I need a bridge script for Capital One?

No. Redbark implements SimpleFIN directly, which the Firefly III data importer supports natively. You paste one setup token and the importer handles the rest.

Why is my first Capital One import slow?

The importer backfills history in 44-day windows, and with no start date it begins at 1970. Set a start date in the importer and the first run drops to a handful of requests.

United States · Self-hosted finance manager

Sync Capital One to Firefly III

Import Capital One transactions into your self-hosted Firefly III over Plaid. Redbark serves your accounts over SimpleFIN, the protocol the Firefly III data importer already speaks, so there is no bridge script to maintain.

Connect Capital One free See pricing

No credit card required

Checking Account

Capital One

Savings Account

Capital One

Credit Card

Capital One

Personal Finances

Asset account: Everyday

SyncingLast synced: 2 min ago

Self-hosted finance manager

Capital One transactions in self-hosted Firefly III

The Firefly III data importer pulls Capital One accounts, balances and transactions straight from Redbark over SimpleFIN. Every transaction carries a stable bank-issued ID, so repeat imports reconcile instead of duplicating.

Get started

Sync Capital One to Firefly III 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 and name it after your Firefly instance.

Claim the token in the importer

Run the Firefly III data importer, choose the SimpleFIN import flow, and paste the setup token when it asks. The importer claims it once and keeps its own private credentials.

Set a start date and import

Give the importer a start date before the first run. Without one it walks history from 1970 in 44-day chunks, which makes the initial Capital One import very slow.