https://skmtc.dev/truelayer/apis/legacy-payments-api/docs/v2/single-immediate-payments-providers/get 2026-11-03 0.5 https://skmtc.dev/truelayer/apis/legacy-payments-api/docs/v2/single-immediate-payment-initiation-requests/post 2026-11-03 0.5 https://skmtc.dev/truelayer/apis/legacy-payments-api/docs/v2/single-immediate-payments/:sip_id/embedded-auth-steps/:step_id/submission/post 2026-11-03 0.5 https://skmtc.dev/truelayer/apis/legacy-payments-api/docs/v2/single-immediate-payments/:sip_id/get 2026-11-03 0.5