LinkModel API Documentation

Claude Code can route Anthropic-format requests through a custom base URL.

Configure

Set your LinkModel key and Claude Code endpoint variables before launching claude:

export LINKMODEL_API_KEY="<YOUR_API_KEY>"
export ANTHROPIC_BASE_URL="https://api.linkmodel.ai/v1"
export ANTHROPIC_AUTH_TOKEN="$LINKMODEL_API_KEY"
export ANTHROPIC_MODEL="claude-opus-4-7"

claude

Use a model available on the Messages endpoint. Anthropic-family models are the safest first choice for Claude Code because the request format is Anthropic-native.

Custom Model Picker

If your Claude Code version supports custom model picker entries, expose a LinkModel model with:

export ANTHROPIC_CUSTOM_MODEL_OPTION="claude-opus-4-7"
export ANTHROPIC_CUSTOM_MODEL_OPTION_NAME="Claude Opus 4.7 via LinkModel"
export ANTHROPIC_CUSTOM_MODEL_OPTION_DESCRIPTION="LinkModel Anthropic-compatible Messages endpoint"

Then open Claude Code and choose the custom model entry.

Notes

ANTHROPIC_AUTH_TOKEN is sent as the bearer token value.
ANTHROPIC_BASE_URL changes where Claude Code sends Anthropic API requests.
If a selected model fails on tool-use fields, switch models or remove the custom endpoint.

Official Reference