Set ANTHROPIC_BASE_URL to https://api.halfapi.com. Do not append /v1.

Claude Code needs a Claude key. A GPT or Codex key will not work here.

Payments are final once the gateway marks them complete. Credits have no cash value.

Use the names listed in the console. Standard and Premium are console options; they do not change the model name.

CLAUDE CODE

Claude Code ANTHROPIC_BASE_URL

Create an API key for Claude, set Anthropic’s base URL to Half API, and keep using Claude Code. Use model names from the console.

Quickstart

1. Create an accountSign up with email at app.halfapi.com.
2. Pay with USDTMinimum top-up is $1. Credits are added when the payment completes.
3. Create an API key for ClaudeIn the console, create a key that can call Claude. Copy the sk- secret.
4. Set the Anthropic base URLPut the key in your environment or project settings. Do not paste it into a chat.

Configure Claude Code

Field	Value
Base URL	`https://api.halfapi.com`
API key	Console key starting with `sk-`
Model	A name from the console list

In a terminal:

export ANTHROPIC_BASE_URL="https://api.halfapi.com"
export ANTHROPIC_API_KEY="sk-..."
claude

Or in the project env / Claude Code settings:

ANTHROPIC_BASE_URL=https://api.halfapi.com
ANTHROPIC_API_KEY=sk-...

Keep a USD balance before long cache-write sessions.

Try it

Restart Claude Code after changing the environment. Send a short prompt. If the request fails, confirm the key is for Claude, the base URL has no /v1, and the payment has completed.

Troubleshooting

Base URL: Set ANTHROPIC_BASE_URL to https://api.halfapi.com. Do not append /v1.
Wrong key: Claude Code needs a Claude key. A GPT or Codex key will not work here.
USDT: Payments are final once the gateway marks them complete. Credits have no cash value.
Models: Use the names listed in the console. Standard and Premium are console options; they do not change the model name.