Returns the current state and callback delivery history for a sandbox simulation. Use this to debug async flows — see whether callbacks have been scheduled, delivered, or failed. Available in sandbox mode only.
The simulation_id returned by POST /sandbox/simulate/inbound
Simulation found
Full simulation state including callback history.
Simulation identifier
Payment rail (ach, wire, crypto)
Operation type (inbound_posted, outbound_failed, etc.)
Scenario name (success_immediate, success_delayed, compliance_hold, etc.)
Current simulation state (accepted, settled, returned, rejected, failed)
Organization that owns this simulation
Amount as decimal string (e.g. "100.50")
ISO 4217 currency code
When the simulation was created
Sub-state for multi-step scenarios (e.g. post_hold)
Whether the simulation is paused waiting for a POST /advance call
Platform account ID (for fiat simulations)
Platform wallet ID (for crypto simulations)
Caller-supplied trace ID
Caller-supplied metadata (informational only)
When the simulation reached a terminal state (omitted if still in progress)
Callback delivery log ordered by scheduled_for ascending
Valid advance actions when awaiting_advance is true (e.g. ["release", "reject"])