Ship your first payment today.
Free sandbox with simulated banks, typed SDKs, and a developer console with full request-level observability. No SWIFT infrastructure, no bank paperwork to start.
Sandbox to production, one promote.
01
Build against simulated banks
Every sandbox ships with simulated bank channels — emit statements, fail payments, replay edge cases on demand.
02
Watch every request
Request logs, webhook deliveries, latency, and top error codes — in the same console finance uses.
03
Promote to live
Same code, same keysets, different environment flag. Consents and workflows carry across.
Observability is not an add-on.
Keys, logs, and webhooks for both environments live inside the product — not a separate status page. When finance asks why a payment is pending, you both look at the same screen.
1.84M
Requests · 24h
142ms
P95 latency
99.98%
Uptime · 30d
Typed clients, headless by design.
TypeScript
@lynqx/sdk
Python
lynqx-python
Java
lynqx-java
REST + webhooks
OpenAPI 3.1 spec
Lynqx is headless — embed payments and statements inside your own fintech product, or run treasury from the console. Same API underneath.