Knak + Custom Validator API
Custom Validator API
The Custom Validator API runs Knak assets through your own testing pipeline and shows the result back to the user before anything ships.
The API enables you to build a custom integration without needing support from Knak, so the accessibility, legal, or brand checks your team already trusts become a step inside asset creation rather than a handoff outside it.
What it does
This API improves your marketing workflow by making your own quality checks part of the build:
- Test on demand from Knak: Users start a validation run from the Knak UI on the asset they are working on, with no export or re-upload.
- Return a clear verdict: Your service responds with a pass or fail that appears to the user inside Knak.
- Link to the full detail: Send back a URL so anyone who needs the complete report can open it in your system.
- Check every asset the same way: Apply the same rules to assets built by hand and assets generated with AI.
Key features
- Full asset context: Each request carries the asset content, name, subject, brand, language code, and version, plus the requesting user and company.
- Your own security header: Set the header name and value yourself when you configure the integration in Knak.
- Availability check: A status endpoint lets Knak show users whether your validation service is currently reachable.
Resources
Knak Help Center
To learn more, visit our Custom Validator API Developer Portal.

