meridian
Use your Claude Max subscription with OpenCode, Pi, Droid, Aider, Crush, Cline, Jcode. Proxy that bridges Anthropic's official SDK to enable Claude Max in third-party tools.
Meridian is a local proxy server that bridges the Claude Agent SDK to the standard Anthropic API format, enabling developers to use their Claude Max subscription with third-party coding tools like OpenCode, Aider, Cline, Droid, and Crush. It translates SDK responses into REST API endpoints that Anthropic-compatible and OpenAI-compatible tools can consume without requiring traditional API keys. The proxy runs locally, handles session management and streaming, and routes all requests through Anthropic's official documented SDK functions.
Key Features
Use Cases
- 01Using Claude Max subscription with OpenCode, Aider, or Cline instead of paying for separate API access
- 02Running multiple coding tools simultaneously against a single Claude Max account
- 03Sharing a Claude Max subscription across a team over the network
- 04Monitoring token usage and prompt cache hit rates for Claude-powered development workflows
- 05Switching between multiple Claude accounts for different projects without restarting tools
- 06Enabling Claude Code features (memory, dreaming) in third-party agents via SDK toggles
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meridian — FAQ
What is Meridian and how does it work?+
Meridian is a local proxy that translates the Claude Agent SDK into standard Anthropic API endpoints. It runs on your machine, accepts HTTP requests from coding tools, routes them through Anthropic's official SDK, and returns responses in the format those tools expect.
How do I install and start Meridian?+
Install globally via npm with 'npm install -g @rynfar/meridian', authenticate once with 'claude login', then run 'meridian' to start the proxy on localhost:3456. Point your tools to http://127.0.0.1:3456 as the base URL.
Which AI coding tools work with Meridian?+
Verified tools include OpenCode, ForgeCode, Droid, Crush, Cline, Aider, Open WebUI, Pi, Jcode, Cherry Studio, and Codex CLI. Any tool that supports custom Anthropic or OpenAI base URLs should work.
Do I need an Anthropic API key to use Meridian?+
No. Meridian authenticates through the Claude Agent SDK using your Claude Max subscription via 'claude login'. Most tools require an API key field to be set, but any placeholder value works since Meridian ignores it.
Is Meridian free and is it allowed by Anthropic's terms?+
Meridian itself is free and MIT-licensed. It uses only Anthropic's official documented SDK functions without bypassing authentication or rate limits, so all requests flow through the same guardrails that Claude Code uses.
What happens when my OAuth token expires?+
Meridian detects token expiry (roughly every 8 hours), automatically refreshes it, and retries the request transparently. If the refresh token itself has expired after weeks of inactivity, you'll need to run 'claude login' again.
How do I install meridian?+
Open the source repository on GitHub and follow its README. meridian is a agent — MCP Agents Market links you directly to the official repo.
Is meridian free?+
meridian is an open-source project hosted on GitHub. Check the repository for its license and any usage requirements.