Developer Tools, APIs, Sandboxes and Open Source
Integrating with payment or banking APIs, SDKs, developer sandboxes, open-source tooling for developers
API Authentication and KeysBanking APIsOpen-Source Finance ToolsPayment APIsPayment IntegrationSDKs and Client LibrariesWebhooks and Integrations
Which companies offer API-based ACH pay-ins and payouts?Jul 5, 2020Payment APIsHow can an international business access SquareCash, Venmo, or PayPal APIs?Jun 1, 2020Payment APIsWhat does it typically cost to integrate 2Checkout into a website?Mar 6, 2017Payment IntegrationHow can I integrate a payment gateway into my WordPress website?Mar 6, 2017Payment IntegrationIn an online payments system, what are IPN callbacks?Mar 3, 2017Payment IntegrationHow can I get access to ACH APIs?Jul 12, 2016Payment APIsAre there APIs that support building remittance services to Nepal, India, and the rest of Southeast Asia?May 5, 2016Payment APIsWill WhatsApp ever offer a full API for interacting with feature phones in creative ways?May 4, 2016SDKs and Client LibrariesDo any fully open-source payment gateways exist, beyond libraries that merely integrate with other gateways?Apr 4, 2016Open-Source Finance ToolsWhich provider offers the best API for sending payments programmatically to international users?Dec 5, 2015Payment APIsAre there API options for recurring payments for Israeli companies besides PayPal?Aug 10, 2015Payment IntegrationWhich financial API should be used to build a free or near-free bank ACH transfer app similar to Venmo or Square Cash?Jul 11, 2015Payment APIsWhich APIs exist for transferring funds between accounts?Jul 3, 2015Payment APIsWhat is the best international address verification service?Jul 2, 2015Payment IntegrationHow do you connect a website with a payment system?Mar 6, 2015Payment IntegrationIs there a card.io-style scanning tool for checks?Jan 3, 2015Payment IntegrationIs there a payment gateway that works directly on platforms like Twitter and Facebook?Jun 11, 2014Payment IntegrationHow can an external party confirm or authenticate a Square transaction?Jun 3, 2014Payment APIsHow can a third party independently verify a Square transaction?Jun 3, 2014Payment APIsIs Stripe’s payment system superior to Dwolla’s for developers?Feb 2, 2014Payment APIsFor developers, is Stripe a better platform than Dwolla?Feb 2, 2014Payment APIsWhat services or APIs enable users to send each other payments (bank/ACH) on my website?Aug 10, 2013Payment APIsWhat online payment solutions work best for a U.S. startup with low volume and small transactions?Jun 11, 2013Payment IntegrationIf donors send donations via PayPal, can their email addresses be automatically captured into a nonprofit’s database?Jun 11, 2013Payment IntegrationHow can payment processing be handled in the background?Dec 5, 2012Payment IntegrationIs there an API for moving funds between a customer’s checking and savings accounts?Oct 11, 2012Banking APIsIs there an API to move funds between a customer’s checking and savings accounts?Aug 10, 2012Banking APIsIs there an API that allows transfers between a customer’s checking and savings accounts?Aug 10, 2012Banking APIsWhere can developers connect with an active PayPal user and API community?May 12, 2012Payment IntegrationDo I need to give my developer details about my credit card processor/acquirer, or is providing the payment gateway information sufficient to set everything up?Mar 1, 2012Payment IntegrationDoes a developer need access to acquirer details or just the payment gateway to set up payments?Mar 1, 2012Payment IntegrationCan Dwolla be used as a payment method on e-commerce sites that don’t use its listed carts?Feb 8, 2012Payment IntegrationCan Dwolla be integrated as a payment option on eCommerce websites?Feb 8, 2012Payment IntegrationDoes Xoom provide an API for integration?Jan 3, 2012Payment APIsDoes Xoom provide an API for integrating money transfer functionality?Jan 3, 2012Payment APIsHow can you pay someone on your site if you only have their credit card number?Dec 12, 2011Payment IntegrationWhich ACH API is best suited for pulling funds from a customer’s bank account?Dec 12, 2011Payment APIsWhere can developers find an active PayPal community?Nov 5, 2011Payment Integration