Fix AgentRouter Proxy for Hermes with CPA Custom UA
Preface
Recently a public welfare site agentrouter popped up
offering free claude-opus-4-8, claude-opus-5, gpt-5.6-sol
However, when you connect this to Hermes, you'll find that it doesn't work.
Inspiration
Came across this big shot's solution of modifying the UA while browsing online
https://blog.notett.com/post/2026/08/202608-agentrouter-proxy/
Practice
After some exploration, I found that CPA cliproxyapi has the function of setting UA.
The content to fill in is just copied from the big shot
User-Agent
Kilo-Code/7.3.50 ai-sdk/provider-utils/4.0.27 runtime/bun/1.3.14
Then you'll find that the test passes in CPA.
Then connect it to Hermes and use it, gpt-5.6-sol works.
But claude-opus-4-8 and claude-opus-5 still don't work.
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Postscript
I used it to run some slightly "heavy" development work, and sometimes encountered refusal to work.
The model provider failed after retries. I kept raw provider details out of chat; check gateway logs for diagnostics.
At this point, sending "continue task" sometimes works, and sometimes still refuses to work.
Important Reminder
When using a relay station, don't use it on your important projects, don't involve your important accounts, and don't let the Agent run on your important VPS.
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