Problem summary
You can't connect an Ahrefs data source in Funnel. The connection fails with an Insufficient plan error.
Error message or symptoms
Insufficient plan
Your Ahrefs data source doesn't connect and Funnel doesn't import any Ahrefs data.
When does this occur
You connect a new Ahrefs data source or reconnect an existing one
Your API key comes from a free Ahrefs account or from a plan that doesn't include API access
Root cause
Ahrefs deprecated its legacy API (v2) on October 1, 2025 and moved to API v3. API v3 requires an API key tied to a paid Ahrefs plan with API access. When you connect with an API key from a free account or from a plan without API access, Ahrefs rejects the request and Funnel shows the Insufficient plan error.
Solution
Check whether your Ahrefs subscription includes API access. To compare plans, see What's the difference between all Ahrefs subscription plans? and How are latest plans different as compared to the old/legacy plans? in the Ahrefs help center.
If your plan doesn't include API access, upgrade to a paid Ahrefs plan that does.
In Funnel, go to Data > Connect > Data sources.
Connect a new Ahrefs data source, or reconnect the existing one, with an API key from your paid Ahrefs plan.
Check that the data source connects. Funnel imports your Ahrefs data on the next scheduled download.