What is Sure?

Sure is a community-maintained open-source personal finance application. It's a fork of the now-abandoned Maybe Finance project, which you can self-host to manage your personal finances privately.

👉 Learn more about Sure

Prerequisites

Before you begin, make sure you have:

• A Sure instance (self-hosted or using a hosting provider)

• At least one bank connected in Lunch Flow

Setup Steps

1. Create a Sure destination in Lunch Flow

1. Go to the Destinations page in Lunch Flow

2. Click "Add Destination"

3. Select "Sure"

4. Click "Create Sure Destination"

2. Copy your API key

After creating the destination, you'll see your API key. Click the copy button to save it to your clipboard.

3. Configure Sure to connect to Lunch Flow

1. Log into your Sure instance

2. Navigate to Settings → Providers

3. Find Lunch Flow and expand it

4. Paste your API key in the API Key field

5. Click "Save Configuration"

4. Link your accounts in Sure

After a successful connection:

1. Go to the Accounts tab in Sure

2. Set up new accounts and link them to your existing ones

🔒 Security & Privacy

All bank connections are read-only and encrypted. Lunch Flow never sees your login credentials and cannot move money.

👉 Learn more about our Security & Privacy — encryption, compliance, and data protection.

FAQ

How often does data sync?

Sure fetches data from Lunch Flow based on its configured sync schedule. You can also manually trigger a sync at any time from Sure's interface.

Does my Sure instance need to be public?

No! With the new integration, Sure pulls data from Lunch Flow's API. Your Sure instance only needs outbound internet access to connect to Lunch Flow—it doesn't need to be publicly accessible.

I have an existing Sure destination with the old setup. What should I do?

Your existing setup will continue to work. However, we recommend migrating to the new integration for a simpler, more reliable experience:

1. Create a new Sure destination in Lunch Flow (this generates an API key)

2. Configure Sure's Lunch Flow provider with the API key

3. Once working, you can remove the old destination