Mercury API might be a bit more popular than Lightspeed. We know about 1 link to it since March 2021 and only 1 link to Lightspeed. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Lightspeed is the biggest. They do everything rewards, integration into other things, online and b&m POS lightspeedhq.com. Source: over 2 years ago
Seems to me you are looking for payment routing. This is something you can program into API's of banks directly : Https://mercury.com/api Https://developer.bankofamerica.com/CPODevPortal/apidocs/public/#/home. Source: almost 2 years ago
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