We've added a DYN endpoint for creating TXT records which can be used to validate letsencrypt certificates. The credentials to use are the same as for DYN updates. An example of the parameters that need to be passed:
I'm planning to use the acme.sh. Acme.sh have several dns methods for different sites. is any one of those methods capable to send the information according tho the format examplified by Brad C. above?
I have created script for acme.sh that utilize the endpoint described by Brad C. above. It can also be used with the pfsense acme package. For obvoius reason there is no delete txt endpoint. You can find the script plugin here: https://github.com/blueslow/sslcertzoneedit