https://www.w3.org/blog/wpwg/2021/03/26/secure-payment-confirmation-stripe-experiment-and-next-steps/ https://www.w3.org/blog/wpwg/2021/03/26/secure-payment-con

https://www.w3.org/blog/wpwg/2021/03/26/secure-payment-confirmation-stripe-experiment-and-next-steps/ https://www.w3.org/blog/wpwg/2021/03/26/secure-payment-confi... This describes Stripe's early involvement in the spec.