Make the server authoritative for slot availability instead of trusting only the browser.
Appointments and deposits
Design an appointment and deposit booking workflow without double-booking surprises
A practical guide to server-authoritative availability, controlled payment state and webhook reconciliation.
Best fit
Appointment-led service businesses that need one initial online booking/deposit workflow with explicit double-booking and webhook state controls.
What the focused offer actually does
Set up one server-authoritative appointment and deposit workflow with controlled Stripe test-mode acceptance before any live-money launch.
Current commercial scope: from US$500
Practical workflow
Four checks before you add more software.
The useful unit is a bounded operating workflow: explicit input, evidence, human judgement where needed, and a visible handoff.
Model booking and deposit states explicitly so payment retries or delayed webhooks do not create duplicate truth.
Test idempotency, double-booking and webhook reconciliation before live-money launch.
Publish cancellation/refund boundaries in the same place the customer commits.
Boundary
Do not turn a useful check into an unsupported claim.
Publish cancellation/refund boundaries in the same place the customer commits.