Update CartDNA App Settings and API Keys
Need to fix a key, switch from test to live, or connect a different sub account? You can update CartDNA app settings without reinstalling the app. This saves time, reduces setup friction, and helps you keep payments running smoothly.
Works for key updates, account changes within the same processor, and correction of earlier setup mistakes.
What can you update in a CartDNA app?
You can edit API keys, change configuration details, and connect a different account or sub account within the same payment processor. You do not need to buy a new licence for that change. The app stays installed. Your setup simply gets updated with the new connection details.
- Update test keys to live keys
- Replace incorrect API credentials
- Edit existing configuration details
- Connect a different sub account
- Connect a different account within the same processor
You can switch accounts inside the same payment processor. You cannot switch the app from one processor to another processor.
Important rule before you make changes
CartDNA apps support key changes and account changes inside the same processor. That gives you flexibility when your PSP account structure changes. But each processor uses different APIs, different authentication logic, and different connection architecture. That is why processor switching is not supported inside the same installed app.
What you can do
- Switch API keys within the same processor
- Move from one sub account to another sub account
- Move from test mode to live mode
- Correct earlier setup errors without reinstalling the app
What you cannot do
- Change the connected processor from Processor A to Processor B
- Reuse the same app for a completely different payment processor
- Skip a new agreement when moving to a new processor
If you want to use a different processor, you need: a new CartDNA app, a new processor connection, and a new signed agreement and approval process.
Why merchants update CartDNA app settings and API keys
Most merchants update settings during growth, testing, or account changes. This often happens when a business moves from sandbox to live payments, fixes setup errors, or needs to connect a different merchant account under the same PSP. Fast updates reduce checkout disruption and help protect conversion rate.
Move from test to live
Replace sandbox keys with live credentials when you are ready to take real customer payments.
Correct setup errors
Fix invalid API keys, wrong secrets, or configuration values that were added earlier.
Switch to another sub account
Connect a different approved account inside the same payment processor setup.
Edit configuration details
Update app settings to match new PSP account details or store requirements.
How to update/switch CartDNA app API keys
You can usually update your settings in a few clear steps. Follow the process carefully. This helps you avoid authentication errors, failed payments, and storefront disruption. Always double check values before saving any change.
Method 1: Update through Shopify Admin
- 1Log in to your Shopify admin.
- 2Open the CartDNA payment app.
- 3Go to the app settings or configuration area.
- 4Find the API credentials section.
- 5Replace the old keys with the correct new keys.
- 6Update any related configuration fields if needed.
- 7Save your changes.
- 8Run a test payment if test mode is active.
- 9Verify the app is connecting correctly.
Method 2: Update through the CartDNA merchant portal
- 1Log in to your CartDNA merchant portal.
- 2Open the store or account linked to your app.
- 3Go to connection settings or API credentials.
- 4Enter the new key details.
- 5Review all related configuration values.
- 6Save the new settings.
- 7Confirm the connection status.
- 8Test checkout behaviour before relying on the new setup.
Support note: If you cannot access the portal or your update fails, contact CartDNA support before making repeated changes.
Best practice before you save new API keys
A small mistake in credentials can block payments, break app communication, or create failed checkout attempts. Use this checklist before you save changes. It helps protect revenue and gives you a smoother switch.
- Confirm you are using the correct account
- Check whether the keys are test or live
- Copy the full key without missing characters
- Review related configuration fields
- Save changes only after a final check
- Run a test transaction
- Confirm successful authorisation and order creation
- Review logs or error messages if the connection fails
Switching from test keys to live keys
This is one of the most common updates merchants make. Test keys help you check the flow safely. Live keys activate real payments. You should only switch after you have validated checkout, app configuration, and processor account readiness.
Before you switch to live
- Make sure your live PSP account is approved
- Confirm the live account matches your business details
- Check currencies and payment methods
- Confirm webhook or callback settings if required
- Run a final end to end test
After you switch to live
- Place a controlled real transaction if appropriate
- Check payment authorisation status
- Verify order creation in Shopify
- Monitor the first live orders closely
- Keep support contact details ready in case of errors
Useful next steps
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Frequently asked questions
Can I update CartDNA app settings without reinstalling the app?▼
Can I switch to a different sub account in the same processor?▼
Can I change the app from one payment processor to another?▼
Can I switch from test keys to live keys?▼
What should I do if the new keys do not work?▼
Need help updating your CartDNA connection?
If you need to edit keys, fix configuration errors, or connect a different account within the same processor, CartDNA support can help you do it safely. Take action before a setup issue affects checkout performance or customer trust.