Simulate Application Approval

⚠️ Sandbox & development only. Simulation endpoints are not available in production and return 404 Not Found there.

Approves a submitted onboarding application in the sandbox as if the compliance review had passed, and kicks off checking-account onboarding for the selected product. Every representative must have passed identity verification (kyc_status is approved) first: like real review, the simulation will not approve an application whose beneficial owner failed KYC, and returns 400 until they pass. Requires an entity API key scoped to the requested entity, or a global API key with the simulations:write scope whose user administers the entity; the application must already be submitted. The application status moves to submitted immediately and to approved once the checking account activates. Poll GET /entities/{entity_id} or subscribe to application.* webhooks to observe the transition. Safe to call repeatedly: if account opening stalls in the sandbox, calling this again completes it.