# LiteLLM Claude Code Proxy Open-source [[LiteLLM]] configuration that lets [[Claude Code]] run against an Azure AI Foundry deployment instead of Anthropic's hosted API. Published by National Bank of Belgium. It's a thin wrapper: a `litellm_config.yaml` with a wildcard model route, a `start_proxy.sh` launcher, a Dockerfile, and a `.env` template. Any model name Claude Code sends is forwarded to one Azure deployment (for instance `azure/responses/gpt-5.3-codex`). ## Why it exists Claude Code speaks Anthropic's `/v1/messages` API. Enterprises often can't use Anthropic directly but have an Azure AI Foundry tenant with approved models. LiteLLM translates between Anthropic's format and Azure's `responses` / Chat Completions API, so Claude Code keeps working against a corporate-approved backend. ## How it works - `model_name: "*"` wildcard in `litellm_config.yaml` — every model name is routed to a single Azure deployment - Claude Code points at the proxy via two env vars: - `ANTHROPIC_BASE_URL=http://localhost:4000` - `ANTHROPIC_AUTH_TOKEN=<LITELLM_MASTER_KEY>` - `LITELLM_LOCAL_MODEL_COST_MAP=true` skips the remote cost map fetch, avoiding SSL errors behind corporate proxies - `start_proxy.sh` uses `uv run` with `UV_NATIVE_TLS=true` to use the system certificate store — another corporate-proxy workaround ## Three ways to configure Claude Code - **Env vars per session** — `export ANTHROPIC_BASE_URL=...` before launching `claude` - **Persistent** — add an `env` block to `~/.claude/settings.json` - **VS Code** — add a `claude-code.env` block to VS Code `settings.json` ## Docker Uses the official `docker.litellm.ai/berriai/litellm:main-stable` image. Two options: build the included Dockerfile, or mount `litellm_config.yaml` directly into the upstream image. Configuration stays in `.env`. ## Takeaways - Clean pattern for using Claude Code with enterprise-hosted non-Anthropic models ([[Bring Your Own Key (BYOK)]] inverted: bring your own model, keep the client) - Same pattern works for any Anthropic-compatible client — not just Claude Code - Practical reference for corporate SSL-proxy workarounds in [[LiteLLM Proxy Configuration]] - Complements [[Claude Max API Proxy]], which goes the other direction (Max subscription → OpenAI-compatible API) ## References - https://github.com/NationalBankBelgium/litellm-claude-code-proxy - https://docs.litellm.ai/docs/tutorials/claude_non_anthropic_models - https://docs.litellm.ai/docs/proxy/docker_quick_start ## Related - [[LiteLLM]] - [[LiteLLM Proxy Configuration]] - [[Claude Code]] - [[Claude Code via GitHub Copilot]] - [[Claude Max API Proxy]] - [[AI Gateway]] - [[Anthropic]]