No need to register just follow the documentations for your harness and use the provided API key below.
Example config for your Claude Code:
Usage Limits:

Providers and Models:






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JSON:
// for Nix
// ~/.claude/settings.json
// for Windows
// %USERPROFILE%\.claude\settings.json
{
"env": {
"ANTHROPIC_BASE_URL": "https://api.xkiro.com",
"ANTHROPIC_AUTH_TOKEN": "API KEY...",
"ANTHROPIC_MODEL": "anthropic/claude-opus-5"
}
}
Usage Limits:

Providers and Models:





