Add IntoDNS.ai - free DNS security API

[RoscoNL]

Adding IntoDNS.ai — free, no-auth API for DNS and email security scanning. OpenAPI spec at intodns.ai/openapi.json. Useful for automated security checks.

— Jeroen, Cobytes B.V.

[arainho]

I appreciate the contribution; however, this resource is out of scope, so this merge request will be closed.

This repository focuses on open-source tools and community resources directly related to API security. Commercial or freemium services are out of scope for this list, as stated in the contribution guidelines: awesome-api-security contributions.

[RoscoNL]

Thanks for the quick review. Understood.

For context, IntoDNS.ai is free to use without signup or API keys, but I understand the list is scoped to open-source/community resources directly related to API security, so no need to reopen this.

Thanks for maintaining the project.