Yes, that is what https://nsec.app is running. The screenshot from the readme describes my problem: 
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I must have misunderstood. I was under the impression you could use your own self-hosted as an always-on signer to alleviate. I haven't been able to dig into it since seeing this.
https://primal.net/e/note1xw04kjsq2cnay0xua7l5cnqgu9qkfnun4npmw54tyy68v8kr2wuq4x6jq8