CLASP

CLASP - Claude Language Agent Super Proxy

Run Claude Code against any LLM provider — OpenAI, Azure, Gemini, Ollama, vLLM, or any OpenAI-compatible endpoint. CLASP is a lightweight Go proxy that sits between Claude Code and your chosen provider, translating the Anthropic Messages API to OpenAI Chat Completions in real time.

Claude Code  →  CLASP (:8080)  →  OpenAI / Azure / OpenRouter / Ollama / custom

No patches to Claude Code. No forks. Just point `ANTHROPIC_BASE_URL` at the proxy and go.

Features

• Bundled Claude Code: Automatically includes Claude Code as a dependency - single npx clasp-ai installs everything
• Multi-Provider Support: OpenAI, Azure OpenAI, OpenRouter (200+ models), and custom endpoints (Ollama, vLLM, LM Studio)
• Full Protocol Translation: Anthropic Messages API ↔ OpenAI Chat Completions API
• SSE Streaming: Real-time token streaming with state machine processing
• Tool Calls: Complete translation of tool_use/tool_result between formats
• Connection Pooling: Optimized HTTP transport with persistent connections
• Retry Logic: Exponential backoff for transient failures
• Metrics Endpoint: Request statistics and performance monitoring
• API Key Authentication: Secure the proxy with optional API key validation

Installation

Via npm (recommended)

# Install globally
npm install -g clasp-ai

# Or run directly with npx
npx clasp-ai

Via Go

go install github.com/jedarden/clasp/cmd/clasp@latest

From Source

git clone https://github.com/jedarden/CLASP.git
cd CLASP
make build

Via Docker

# Run with Docker (from GitHub Container Registry)
docker run -d -p 8080:8080 \
  -e OPENAI_API_KEY=sk-... \
  ghcr.io/jedarden/clasp:latest

# With specific version
docker run -d -p 8080:8080 \
  -e OPENAI_API_KEY=sk-... \
  ghcr.io/jedarden/clasp:0.24.8

# Or with docker-compose
docker-compose up -d

**Available Docker tags:**

• latest - Latest