Xum - Hostlinku Docs

Xum (formerly Mux) runs multiple coding agents in parallel, each with its own isolated workspace, from your desktop or browser. Xum supports custom providers with your choice of API format—the cleanest way to add Hostlinku without changing the default OpenAI/Anthropic provider.

Alternative: the built-in OpenAI provider

If you prefer to use only one provider, configure the built-in OpenAI provider to use Hostlinku with the Chat Completions wire format (Settings → Providers → OpenAI, or in providers.jsonc):

{
  "openai": {
    "apiKey": "sk-isi-api-key-kamu",
    "baseUrl": "https://api.hostlinku.com/v1",
    "wireFormat": "chatCompletions",
  },
}

Troubleshooting

Symptoms	Solutions
`401`	The contents of the `apiKeyFile` are incorrect (contain newlines or spaces) or the key has been revoked.
`404`	`anthropic-messages` with a duplicate `/v1` — set the base URL to `https://api.hostlinku.com`.
Provider not displayed	The provider ID contains uppercase letters or periods, or conflicts with a built-in provider name.
`404 model_not_found`	Incorrectly typed slug — copied from `GET /v1/models`.