Hey there, let's sort out this Stripe API issue you're hitting—super common mixup with their key types, so no worries!

First, let's clarify Stripe's two key types #

Stripe uses distinct API keys for front-end vs. back-end operations, and mixing them up is exactly what's causing your error:

• Publishable keys (starts with pk_): These are safe to use in client-side code (browsers, mobile apps) for things like collecting card details or initializing payment elements. They have limited permissions and can't perform sensitive actions.
• Secret keys (starts with sk_): These are for your server-side code only. They have full permissions to handle sensitive operations like creating charges, refunding payments, fetching customer data, or most of the core API calls you'd run from a backend service.

Step-by-step fix #

1. Identify which API call is failing: Any operation that modifies data, accesses sensitive customer info, or processes payments needs a secret key. If you're running this call from your backend, you definitely need to swap out the publishable key.
2. Grab your test secret key: Head to your Stripe Dashboard's API Keys section (test mode) and copy the key starting with sk_test_ (not the pk_test_ one you're currently using).
3. Update your code: Replace the publishable key in your server-side code with the secret key. For example, in a Node.js backend:

   // ❌ Wrong: Using publishable key for server-side call
   const stripe = require('stripe')('pk_test_yourPublishableKey');
   
   // ✅ Correct: Using secret key for server-side operations
   const stripe = require('stripe')('sk_test_yourSecretKey');
   

4. Double-check key placement: Make sure publishable keys only live in front-end code, and secret keys stay strictly on your backend—never expose a secret key in client-side JS, HTML, or mobile app bundles (that's a huge security risk!).

If you still run into issues after swapping the key, double-check that you're using the right key for your environment (test vs. live) and that the API call you're making is indeed supported with a secret key (most server-side calls are).

内容的提问来源于stack exchange，提问作者chirizwacho