Claude Code

Claude Code is Anthropic’s terminal agent. It speaks the Anthropic Messages API, which Triw implements, so it runs against Triw with a base URL and a token.

Requirements

Item	Minimum
OS	macOS 13+, Windows 10 (1809+), Ubuntu 20.04+, Debian 10+, Alpine 3.19+
Hardware	4 GB RAM, x64 or ARM64
Shell	Bash, Zsh, PowerShell or CMD
Network	outbound HTTPS to `router.triw.io`

Install

curl -fsSL https://claude.ai/install.sh | bash

irm https://claude.ai/install.ps1 | iex

curl -fsSL https://claude.ai/install.cmd -o install.cmd && install.cmd && del install.cmd

npm install -g @anthropic-ai/claude-code

claude --version     # confirm the binary is on PATH

Point it at Triw

Claude Code reads two variables: the endpoint and the credential.

export ANTHROPIC_BASE_URL="https://router.triw.io"
export ANTHROPIC_AUTH_TOKEN="sk-..."      # Triw key
claude

$env:ANTHROPIC_BASE_URL = "https://router.triw.io"
$env:ANTHROPIC_AUTH_TOKEN = "sk-..."
claude

Persist it per user so every new shell inherits it:

~/.claude/settings.json

{
  "env": {
    "ANTHROPIC_BASE_URL": "https://router.triw.io",
    "ANTHROPIC_AUTH_TOKEN": "sk-..."
  }
}

The base URL is the host only — do not append /v1. Claude Code adds /v1/messages itself.

Choose a model

export ANTHROPIC_MODEL="claude-sonnet-4-5"

List what your key may use:

curl https://router.triw.io/v1/models -H "Authorization: Bearer $ANTHROPIC_AUTH_TOKEN"

Inside a session, /model switches models and /status shows the resolved endpoint and account.

Verify

claude -p "reply with the single word: ready"

Then confirm the request landed: Triw console → Logs. A row with your key and model means the routing works.

Troubleshooting

Symptom	Cause	Fix
`401 Invalid API key`	Token empty, quoted, or trailing space	Re-export without quotes; check `echo "${ANTHROPIC_AUTH_TOKEN:0:6}"`
Calls still reach `api.anthropic.com`	`ANTHROPIC_BASE_URL` not exported in that shell	Export in the same shell, or use `settings.json`
`404` on every request	Base URL includes `/v1`	Use `https://router.triw.io`
`model_not_found`	Model not in the key’s group	Create a key in a group that includes it
Login prompt appears	`ANTHROPIC_API_KEY` set in the environment	Unset it; Triw issues tokens, not Anthropic accounts

Uninstall: delete ~/.claude plus the binary reported by which claude (native installer) or npm uninstall -g @anthropic-ai/claude-code.

Getting started

Account

API

SDKs

Tools