> ## Documentation Index
> Fetch the complete documentation index at: https://redbark.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Zerosum

> Connect supported bank accounts to Zerosum through Redbark's SimpleFIN integration.

[Zerosum](https://zerosum.so/) supports SimpleFIN as a bring-your-own bank sync provider. Redbark serves supported Australian, New Zealand, and United States bank accounts through SimpleFIN, so Zerosum can import your balances and transactions without your bank credentials.

<Info>
  Bring-your-own bank sync requires a Zerosum **Plus** or **Pro** plan, including the Pro trial. SimpleFIN access requires a Redbark **Developer** or **Professional** plan, including trials.
</Info>

## Setup

<Steps>
  <Step title="Connect your banks to Redbark">
    Add the bank connections you want to use in [Redbark](https://app.redbark.com/connections). Zerosum can access banking accounts, but not brokerage accounts.
  </Step>

  <Step title="Generate a SimpleFIN setup token">
    In Redbark, open [Settings > API & MCP](https://app.redbark.com/settings/api-mcp). Generate a SimpleFIN setup token and name it after Zerosum.

    Copy the token when it appears. It is shown once, can be claimed once, and expires in 7 days if unused.
  </Step>

  <Step title="Connect SimpleFIN in Zerosum">
    In Zerosum, open **Bank Sync**, choose **Connect SimpleFIN**, and paste the Redbark setup token. Zerosum claims the token and stores the resulting read-only credential encrypted at rest.
  </Step>

  <Step title="Link your accounts">
    Link each imported bank account to a new or existing Zerosum account. Connecting the provider does not add every account to your budget automatically.
  </Step>
</Steps>

## How it behaves

* Zerosum requests current balances and transactions from Redbark on its own sync schedule.
* Imported transactions use Zerosum's normal review, matching, and duplicate-prevention flow. Approved or reconciled transactions are not silently overwritten.
* Adding another bank in Redbark does not add it to your budget automatically. Use **Refresh accounts** in Zerosum, then link the account you want.
* Redbark Developer is 30% off while the Zerosum connection remains active. Redbark removes the partner discount after 30 days without an authenticated Zerosum sync.

## Disconnect

Disconnecting SimpleFIN in Zerosum deletes Zerosum's stored credential and returns linked accounts to manual mode. Accounts and existing transactions stay in your Zerosum budget.

To revoke the credential directly, open **Settings > API & MCP** in Redbark and revoke the Zerosum token. This cuts off access without affecting your bank connection or other connected apps.

See Zerosum's [bring your own provider guide](https://help.zerosum.so/en/articles/3534953) for its account-linking and troubleshooting instructions. Protocol details and limits are in the [SimpleFIN reference](/docs/api-reference/simplefin).