Enterprise API integration
Programmable payouts, queries, and callbacks

We provide REST-style integration guidance and event notification patterns so engineering and finance can go live compliantly—actual endpoints, fields, and versions are in your technical pack after onboarding.

HTTPS & keys

Key rotation, scopes, and safe rate practices.

Webhooks & signatures

Delivery, verification, and replay protection.

Versioning

Compatibility cadence to reduce surprise changes.

Server room and API infrastructure

Manual bottlenecks

  • Ops-created payouts don’t scale and error often.
  • ERP/order systems drift from payment status.
  • Inconsistent errors and retries make incidents hard to trace.
Developers collaborating on integration

What API changes

Automatable, observable, and rollback-friendly integration boundaries.

  • Backend jobs trigger payouts and queries.
  • Webhooks push status into orders and ledgers.
  • Idempotency and tracing for audits.

Typical scenarios

01

E-commerce

Auto-create payouts after checkout; sync order/invoice.

02

SaaS billing

Recurring charges with failure retries.

03

Payroll / suppliers

Batch files or queues plus reconciliation exports (product-dependent).

Response preview

Switch operation and environment to browse a JSON structure preview (field names/types per official docs).

Operation

Environment

Static preview only—not a live API; follow the technical handbook and key issuance process.

Integration pillars

Subject to product specs and contracts.

Auth & access

API keys, signatures, and IP allowlists.

Commands & queries

Create, fetch status, cancel/expiry flows (module-dependent).

Events & retries

Webhook backoff and dead-letter patterns.

Launch & monitoring

Sandbox, logs, and alerting alignment.

Enterprise API — common questions

How do sandbox and production differ?

Sandbox validates connectivity and payloads without moving real funds; production requires onboarding, keys, and scopes.

How should we verify webhook signatures?

Follow the technical pack—shared secret or public-key verification with timestamp/replay checks.

What is a safe API key rotation flow?

Overlap keys: issue new credentials, update backends, monitor traffic, then retire the old key with least-privilege scopes.

Are idempotency and retries supported?

Create-style calls typically accept idempotency keys; webhook delivery uses backoff patterns per module/version.

What checks before go-live?

End-to-end sandbox tests, error-code mapping, TLS/signature on webhook endpoints, and finance field alignment.

View full FAQ

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You can also email business & legal: info@hkmoneychanger.com