FAQ

Can I use a Coupler.io source that references another Coupler.io source?

Yes, but keep it simple. You can chain flows (Flow C pulls from Flow B, which pulls from Flow A), but avoid long chains—they become hard to troubleshoot. Two or three levels is usually the maximum before performance and maintainability suffer.

Do I need to run all my source flows every time, or just the main one?

You need to run all source flows in the chain. If you have a main aggregating flow that pulls from three separate Coupler.io sources (Google Ads, Facebook Ads, Stripe), you must run all three source flows, then run the aggregating flow. Running only the main flow won't trigger the upstream sources.

What transformations can I use with Coupler.io sources?

You can use Join, Append, and Aggregate just like any other source. For example:

• Append multiple Coupler.io sources to combine data from different platforms

• Join them on a common key (like customer ID) to correlate data

• Aggregate them to calculate metrics like total spend by channel or average order value by region

If I edit my source data flow, will the dependent Coupler.io source automatically update?

No. Changes to your source flow's structure (adding columns, removing fields) don't automatically cascade. However, data changes do—if you re-run the source flow with new data, the next run of the dependent Coupler.io source will reflect that new data.

If you add new columns to the source flow, the Coupler.io source will pick them up on the next run, but you'll need to update downstream steps or destinations to use them.

Can other team members use my data flows as Coupler.io sources?

No. Coupler.io sources only reference flows you created. Other team members can only see and use their own flows. If you want to share a data flow's output, export it to a shared destination (Google Sheets, BigQuery) instead.

For more on permissions and team access, see the best-practices section.

What happens if the source data flow fails to run?

If your source flow fails, any dependent Coupler.io sources will pull stale data from the last successful run. No error will be thrown—you'll just get outdated data. Always monitor your source flows to catch failures early.

Learn how to troubleshoot failed flows in common-issues.md.

Can I use Coupler.io sources with AI destinations like Claude or ChatGPT?

Yes. You can pull data via a Coupler.io source and send it to Claude, ChatGPT, Cursor, Gemini, Perplexity, or OpenClaw, just like any other source. This is useful for automating content creation, analysis, or drafting based on imported data.

Does using Coupler.io as a source count toward my API usage limits?

No. Coupler.io sources don't make new API calls. They only read data that was already imported by your source flow. Your API usage is only incurred by the original import, not by downstream Coupler.io sources.

For more on API limits and optimization, see the best-practices section.