mod_rest: Catch and log errors in callback promise chain From the code it looks like it should be possible to reply to an error stanza, but it did not. Turns out I was saved by my local developer mode module which throws errors if an attempt is made to create an errror reply to an error stanza. However nothing collects this error from the promise, so all I got was confusion.

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summary: External Service Discovery
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This module implementing [XEP-0215] is included with Prosody 0.12 but made available here for older versions.

Documentation is available on the [Prosody site][doc:modules:mod_external_services].