Runs authorize → checkout → purchase →
ship → verify as a multi-step flow.
This UI targets a single backend: /api/commercial-flow (no per-verb endpoints).
Edit fields, then run a single step or the full flow. Receipts come back per-step with a shared
trace_id. Copy curl to reproduce.
/api/commercial-flow is forwarding to a
commercial runtime, your receipts are real runtime receipts (signed).
Switch between the latest step, full raw response, and the curl block.
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