APIs > Loan Details API
Know what changed in arc OS. The moment it changes.
The Loan Details API enables approved lenders and partners to retrieve loan application details from arc OS and subscribe to webhook notifications for key loan lifecycle events. Use webhook event notifications to know when something changes, then call the API to retrieve the latest loan-level details needed by your downstream system.
You only pull the data on loans that actually need it — payloads stay light, calls stay cheap, and your stack stays lean.
Event notifications
Receive instant webhook notifications from arc OS the moment key events occur.
Data retrieval
Retrieve real-time loan-level data and details through a unified API.
Security
Authenticate using access tokens and subscription keys.
Versioning
Backward compatibility is maintained as the API evolves over time.
how it works
Keep external systems synchronized with arc OS loan activity.
1. Subscribe to webhook events.
2. Receive event notifications.
3. Retrieve loan details through the API.
4. Update downstream system.
Event flow:
event happens → webhook notifies system → system retrieves details through API.
Application events:
■ New application
■ Application withdrawn
■ Application withdrawal canceled
■ Application funded
■ Application exported to host
Decision events:
■ New decision
Workflow events:
■ Work queue changed
■ Data Process Export
■ Stipulation complete
Collaboration and document events:
■ New loan comment
■ Stipulation complete
■ New loan document
Common Use Cases
Synchronize loan application data from arc OS into external systems such as CRMs, dashboards, workflow tools, document platforms, or partner servicing applications.
Keep a CRM or servicing platform updated with loan status changes.
Notify downstream systems when a loan is funded, withdrawn, approved, or moved to a new work queue.
Retrieve loan details after receiving a webhook event.
Support partner workflows that need approved access to loan application data.
Reduce manual status checks and scheduled polling.
Lender benefits
Cleaner operational handoffs
Work-queue changes flow straight into Salesforce, HubSpot, Teams, or ServiceNow — wherever your team already works. The right person picks up the loan at the right moment, without anyone shouting across tools.
Less code to maintain
No polling jobs to schedule. No sync queues to monitor. No retry logic to write. arc OS pushes events; your handler responds. Your engineering team builds features instead of plumbing.
Always-current data
No more "last sync ran at 6am" caveats in your dashboards. Reports reflect the state of the portfolio right now.
Pull only what you need
Events tell you what changed. The REST API lets you fetch exactly the fields you ask for — no oversized payloads, no parsing waste, no irrelevant data crossing your network.
Faster member experience
Members hear about approvals, funding, and status changes in seconds, not hours. The event fires the notification — no sync cycle in between.
Lower infrastructure cost
Scheduled polling racks up API calls whether anything changed or not. Webhooks only fire when something actually happens — so you pay for signal, not noise.
Ready to get started?
Review the Quick Start Guide to understand account setup, authentication, environments, and production launch requirements. Then create a developer account.
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