Is there a module to process webhooks? Rather than polling a device through HTTPMOD, I would like to send FHEM the payload asynchronously. This could be a HTTP alternative to MQTT.
For example, when the value of a sensor changes, it sends a webhook (e.g. http://hostname:8083/fhem/api/washer?temp=55) to set the value of the temp attribute of device washer to 55.
Another example is the GEOFANCY module which uses a webhook interface.
I found the answer in the CsrfToken-HowTo.
Suggestion: Incorporate the term webhooks in the documentation to help newbies find this. :)
I added the term at the proper place. Thank you for your proposal.