The Groundwork Donations ; Seamlessly collect donations on your website

https://andytips.org/features/donations A donation platform and API for nonprofits, NGOs, and campaigns and using their pre-integrated suite or start your own API experience and integrates with services like Mailchimp and Salesforce, and they have a feature-rich dashboard so you can track your progress. It also offers many other APIs to complement your fundraising efforts: subscriptions, events, accounts, and P2P Fundraising. They have an API and drop-down texts that allow you to run your own fundraising campaigns