Built for a clean integration

CheckCheck is designed to drop into your existing check workflow: register a check when it's issued, verify it when it's deposited. A modern, well-documented API does the heavy lifting, so your team integrates two clear steps rather than rebuilding a fraud stack.

Deterministic results

Every verification returns a clear match / no-match outcome your systems can act on directly — and that an examiner can follow. No probabilistic score to interpret.

Modern, versioned API

A documented, stable API with safe retries and a traceable request ID on every call, so integrations are predictable and easy to support.

Events & lifecycle

Subscribe to webhooks for registration, verification, and resolution, and follow each payment through its lifecycle without polling.

SDKs & tooling

Official SDKs, an OpenAPI specification, and a guided onboarding collection — or integrate directly over HTTPS. Bulk file processing is available alongside the per-item API.

Sandbox to start

A sandbox environment lets your team explore realistic scenarios and validate the integration before touching production traffic.

Full reference under NDA

The complete API reference, endpoint specifics, and sample payloads are shared with pilot institutions once an NDA is in place.