MSP will allow you to take card payments as long as you are on the Pro account. This will require some setup initially.

1. Create an account at Stripe:

2. On the dashboard, go to Developers | API Keys

3. In the Restricted API Keys section, Create Restricted Key giving Read / Write access to the Charge option.

4. Open MSP and go to System | Settings | Stripe

5. Copy and paste your Public Key and Restricted Key into the corresponding fields and click Save

6. Go to a Customer or Job | Financial Information | Add Payment

7. Enter an amount to charge as well as a reference then click the credit card button.

8. Enter the credit card information and click Continue.

The card will be charged and assigned to that customer.