cognition-claude-proxy

cognition-claude-proxy is a robust local proxy solution that enables Claude Code — or any client utilizing the Anthropic API — to leverage Devin's extensive model catalog, which includes popular models such as SWE-2, GLM-5.2, DeepSeek V4.1 Flash, and over 200 others. This proxy effectively translates the Anthropic Messages API into the Connect-RPC format utilized by Devin, while also converting the streaming responses back into Anthropic SSE format.

How It Works

The architecture of cognition-claude-proxy operates seamlessly as demonstrated in the flowchart below:

graph LR
    CC[Claude Code] -->|POST /v1/messages\nAnthropic JSON| PX[Proxy :8765]
    PX -->|Connect-RPC protobuf\nauthenticated| UP[Devin CLI backend\nserver.codeium.com]
    UP -->|streaming events| PX
    PX -->|Anthropic SSE| CC
    PX -->|GET /v1/models| UP
    style PX fill:#4d94ff,stroke:#333,stroke-width:2px
    style CC fill:#e066ff,stroke:#333
    style UP fill:#2eb82e,stroke:#333

For additional context, a plain-text flow representation is also available:

claude  (ANTHROPIC_BASE_URL=http://localhost:8765)
  -> POST /v1/messages            (Anthropic Messages API, JSON)
    -> proxy: translate to Connect-RPC protobuf
      -> POST https://server.codeium.com  (authenticated via local Devin CLI credentials)
    <- Connect server-stream of events (text/thinking/tool-call/usage)
  <- Anthropic SSE events (message_start/content_block_*/message_delta)

Authentication is streamlined, requiring only the local Devin CLI credentials stored in the corresponding configuration file. No separate API keys are necessary; if the devin command functions correctly, then dclaude is ready to use as well.

Features

• Easily integrates with Node.js version 18 or higher.
• Works with authenticated setups of both Devin CLI and Claude Code.

Quick Start Instructions

To initiate the proxy, clone the repository and navigate to the directory:

git clone https://github.com/coderexpert123/cognition-claude-proxy.git
cd cognition-claude-proxy

Then, start the proxy either through the wrapper or directly:

# Option A: using the wrapper (automatically starts the proxy)
bin\dclaude.bat -p "hello"

# Option B: starting the proxy manually
node src/server.js  # starts on 127.0.0.1:8765
# then in another shell:
set ANTHROPIC_BASE_URL=http://localhost:8765
set ANTHROPIC_AUTH_TOKEN=test
claude -p "hello"

Model Management

The dclaude.bat script facilitates model management by mapping tier aliases to specified models, ensuring clear and organized access to model capabilities:

The proxy also supports customizable settings for context windows via a claude-settings.json file, allowing for flexibility based on the specific needs of users and conducive operation with multiple models.

Status and Compatibility

The solution has been verified through successful end-to-end testing with real sessions of Claude Code, confirming the handling of text, thinking responses, tool calls, and multi-turn interactions. Users can obtain support for various troubleshooting scenarios as outlined, ensuring an efficient development experience.

Through its unique capabilities, cognition-claude-proxy serves as a powerful tool to harness the potential of advanced AI models, enabling more effective interactions and streamlined workflows.