# Resources

{% content-ref url="resources/application-parameters" %}
[application-parameters](https://docs.certn.co/api/api-reference/resources/application-parameters)
{% endcontent-ref %}

{% content-ref url="resources/error-codes" %}
[error-codes](https://docs.certn.co/api/api-reference/resources/error-codes)
{% endcontent-ref %}

{% content-ref url="resources/region-codes" %}
[region-codes](https://docs.certn.co/api/api-reference/resources/region-codes)
{% endcontent-ref %}

{% content-ref url="resources/report-field-mappings" %}
[report-field-mappings](https://docs.certn.co/api/api-reference/resources/report-field-mappings)
{% endcontent-ref %}