Adding real payments to a Base44 app (3 insertion points, tested)

Disclosure up front: I'm Oded, co-founder of UniPaaS, the FCA-authorised Payment Institution (No. 929994) behind paas.build - so this is a vendor writing about his own product. That said, the three Base44 mechanics below are documented Base44 surfaces, and they work with any external payments API, not just ours. The wall Tell Base44 "add payments" and it installs Stripe or Base44 Payments (powered by Wix), plus Tranzila/Max for Israel. Both main options are solid if you qualify: Stripe is excellent infrastructure with first-class docs, and the Wix-powered option is native to the platform. The fine print is where builders hit a wall: Stripe live mode needs verified business and banking information before you can take a real payment. Base44 Payments requires "a business and bank account based in one of the supported countries" (their docs). The top payments request on Base44's own feedback board is "a way to setup other payment providers other than Stripe" - precisely because not every country is supported. Base44 webhooks only fire while someone is actively using your app, so 3am subscription renewals, retries and dunning silently don't run. If you have a registered company in a supported country and mostly sell one-off purchases, use the built-in Stripe path. It's the smoothest. The rest of this post is for everyone else. Base44 gives you three documented ways to wire in an external provider. I tested all three with paas.build. Here's each, and when it fits. Insertion point 1: custom MCP connection (build-time) In Base44: Settings → Account → MCP connections → Add custom MCP . Name: paas.build Server URL: https://paas.build/sse Auth: API key (your paas.build key) That's the legacy SSE endpoint Base44's form takes; streamable HTTP lives at https://paas.build/mcp for agents that support it. Base44's AI treats MCP connections as tools it can call when your request needs external data or actions. So in the editor chat you can say "use paas.build to create a live merchan