Mailchimp connection fails with invalid credentials
Mailchimp API key or connection shows invalid credentials, failed auth or fails to load lists.
Tier II · Emerging Problems that are still building up.
4 public reports · first reported 15 September 2014 · last reported 1 August 2026
What's going wrong
Many site owners report that the Mailchimp plugin says its API key or connection is invalid, even when the same key works in another app.
AI-assisted: written with the help of AI from the reports. The idea report has the full summary.
In the idea report
- The full summary.
- The products the 4 reports are about, and how many came each month.
- Related problems.
No business has been found with this problem yet, so the report has no contacts. All sales are final — no refunds. Pricing.