Developers
API Reference & Quickstarts

Build Your Digital Infrastructure

with Capstone

Explore Capstone’s REST APIs, events, and data models for integrations, onboarding, and monitoring. Launch faster with SDKs and quickstarts.

Book a Discovery Call
What you’ll find

Documentation and Tools

For

Fast Integration

API Docs
Endpoints for users, accounts, instructions, settlements, and cases.
Quickstarts
Pipelines for payouts, collections, onboarding, sanctions checks, and transaction monitoring.
Events
Webhooks for status updates, alerts, and exception handling.
SDKs (Roadmap)
SDKs available in TypeScript and Python for rapid integration.
Test Data & Simulators
Corridors, cutoffs, and exception flows for realistic testing.
Download

Specifications &

Documentation

UNI-RAIL OpenAPI skeleton

YAML — import into Postman/Stoplight

Download
UNI-RAIL API v1.1

PDF, sandbox doc

Download
Get Sandbox Access