```
curl http://phabricator.something.com/api/harbormaster.createartifact \
-d api.token=api-some-key\
-d buildTargetPHID=PHID-HMBT-some-phid \
-d artifactKey=jenkins.uri \
-d artifactData[uri]="http://build:8080/job/blah" \
-d artifactType=uri \
-d artifactData[name]="Jenkins Build" \
-d artifactData[ui.external]=1
```
Complains with
```
{"result":null,"error_code":"ERR-CONDUIT-CORE","error_info":"Parameter 'ui.external' has invalid type. Expected type 'optional bool', got type 'string'."}
```
Replacing `1` with `true` does not solve.
See also [[ https://secure.phabricator.com/Q326#A335 | this ponder question ]] although there is no info in the question that isn't in this task.