Nexus-CLI – Pure Go Bridge to DeepSeek R1/V3 with Claude Code and Ollama Support

A developer released Nexus-CLI, a pure Go command-line tool and local API proxy that connects applications and coding agents to DeepSeek V3 (deepseek-chat) and R1 (deepseek-reasoner) models through a free chat.deepseek.com web account rather than a paid DeepSeek API key. Nexus-CLI solves DeepSeek's DeepSeekHashV1 proof-of-work challenges in parallel across CPU cores, clearing difficulty 144,000 challenges in roughly 40–50 milliseconds with zero runtime dependencies, and its `nexus serve` proxy exposes OpenAI, Anthropic Messages (compatible with Claude Code and the Anthropic SDK) and native Ollama endpoints. The tool also adds a multi-account pool with round-robin rotation to work around HTTP 429 rate limits, structured JSON Schema outputs, and a one-command launcher for Claude Code, Codex, OpenCode, Goose and Aider, and requires Go 1.20 or later to build.

A high-performance Golang CLI utility and local API proxy server that enables any application or coding agent to connect to DeepSeek V3 deepseek-chat and R1 deepseek-reasoner / Thinking models via a free web account chat.deepseek.com , without requiring an official paid DeepSeek API key. Rewritten from scratch in pure Go Golang based on in-depth analysis of Node.js FreeDeepseekAPI-EN and Python deepseek bridge projects, featuring zero runtime dependencies . 1. Pure Go Parallel PoW Proof-of-Work Solver: - Solves DeepSeek server challenges using the DeepSeekHashV1 algorithm Keccak-f 1600 1..23 rounds SHA3-256 parallelized across CPU cores. - Solves difficulty 144,000 challenges in just ~40–50 milliseconds no CGO, WASM, or Python dependencies required . 2. Solves DeepSeek server challenges using the 3. Interactive Terminal Chat REPL : - Streams the R1 model's thought process reasoning content in real-time with dedicated styling italic/cyan . - Polished ANSI UI with colorful prompts and animated loading spinners. - Built-in slash commands: /help , /new , /model , /thinking , /search , /whoami , /clear , /exit . 4. Streams the R1 model's thought process 5. One-Off & Unix Pipe Support: - Direct CLI queries: nexus "What is quantum computing?" - Linux/macOS pipe workflows: cat main.go | nexus "Review this code for security and performance" 6. Direct CLI queries: 7. OpenAI, Anthropic & Ollama Compatible Proxy Server nexus serve : - POST /v1/chat/completions OpenAI format, SSE streaming, and JSON - POST /v1/messages Anthropic Messages API — 100% compatible with Claude Code and the Anthropic SDK - POST /v1/responses OpenAI Responses API - GET /v1/models and GET /v1/model-capabilities - GET /v1/sessions and POST /v1/sessions/reset - Connects seamlessly with Open WebUI, Continue.dev, Cursor, Cline, and any other OpenAI/Anthropic client. 8. Native Ollama API Emulation 🦙: - Emulates GET /api/tags , POST /api/chat , POST /api/generate , GET /api/version . - Direct plug-and-play compatibility with Open WebUI, Dify, AnythingLLM, Cursor, LlamaIndex, and official Ollama SDKs. 9. Emulates 10. Structured Outputs & JSON Schema 🎯: - Enforce strict JSON output or validate against JSON Schemas across CLI, Ollama, and OpenAI endpoints. 11. Universal Integrations Launcher 🚀: - One-command launcher for Claude Code, DeepSeek Harness, Codex, OpenCode, Goose, and Aider Nexus automatically boots the proxy in the background . 12. Multi-Account Pool 👥: - Rotate multiple DeepSeek accounts using Round-Robin scheduling to eliminate rate-limit roadblocks HTTP 429 . 13. Authentication Management nexus auth : - Manual login: nexus auth login extract userToken from browser LocalStorage - Automatic via Chrome: nexus auth chrome reads session token from browser memory via CDP - Account inspection: nexus auth whoami 14. Manual login: 15. System Diagnostics Doctor : - nexus doctor — instantly checks token validity, server connectivity, PoW solver performance, and session creation. Requires Go 1.20+: Clone repository and navigate to directory: git clone https://github.com/xamrayev/nexus-cli.git cd nexus-cli Build the executable binary: go build -o bin/nexus . Install globally to system PATH optional : go install . There are 3 ways to connect your DeepSeek account: ./bin/nexus auth login You will be prompted for your userToken : 1. Open https://chat.deepseek.com in your browser. 2. Press F12 or Cmd+Option+I on macOS . 3. Navigate to Application - Local Storage - https://chat.deepseek.com - copy the userToken value and paste it into the prompt. ./bin/nexus auth chrome This automatically launches a Chrome window. Once you log in, Nexus securely captures and stores the session token. Create a .env file in the project root: DEEPSEEK TOKEN=your deepseek token here ./bin/nexus chat Or simply: ./bin/nexus Real-time R1 reasoning stream: nexus ❯ Why is the sky blue? 💭 Thinking Process: The user is asking about the physical cause behind the color of the sky... Need to explain the mechanism of Rayleigh scattering of sunlight by atmospheric molecules... 🤖 DeepSeek deepseek-reasoner : The primary reason the sky appears blue is due to a phenomenon called Rayleigh scattering... ./bin/nexus "Provide 3 key facts about general relativity" cat main.go | ./bin/nexus "Analyze this code for security vulnerabilities and performance bottlenecks" ./bin/nexus serve --port 9655 You can now route any tool Cursor, Open WebUI, Claude Code to http://localhost:9655/v1 Sample cURL request in OpenAI format: curl http://localhost:9655/v1/chat/completions \ -H "Content-Type: application/json" \ -d '{ "model": "deepseek-reasoner", "messages": {"role": "user", "content": "Hello "} , "stream": true }' Nexus implements the Ollama API specification. Open WebUI, Dify, AnythingLLM, Cursor, LlamaIndex, and official Ollama libraries can connect directly to http://localhost:9655 : 1. Fetch available models Ollama format curl http://localhost:9655/api/tags 2. Ollama Chat request NDJSON streaming curl http://localhost:9655/api/chat -d '{ "model": "deepseek-reasoner", "messages": {"role": "user", "content": "Hello "} , "stream": true }' Using the official Python Ollama SDK: python import ollama client = ollama.Client host="http://localhost:9655" resp = client.chat model="deepseek-reasoner", messages= {"role": "user", "content": "Write a simple HTTP server in Go"} print resp "message" "content" Enforce strict JSON output or conform to a specified schema: 1. Direct JSON from CLI pipeable to jq ./bin/nexus "Top 3 programming languages and their primary domains" --format json | jq . 2. Via Ollama API: curl http://localhost:9655/api/chat -d '{ "model": "deepseek-reasoner", "messages": {"role": "user", "content": "List 3 fruits in JSON"} , "format": "json", "stream": false }' 3. Via OpenAI API response format : curl http://localhost:9655/v1/chat/completions -d '{ "model": "deepseek-reasoner", "messages": {"role": "user", "content": "Return device specs as JSON"} , "response format": {"type": "json object"} }' Launch coding tools and agents with a single command — Nexus automatically boots the proxy server in the background: 1. Claude Code CLI powered by DeepSeek R1 / V3 ./bin/nexus launch claude ./bin/nexus launch claude -p "Refactor this Go code" 2. Official DeepSeek Harness CLI @deepseek-ai/dsh ./bin/nexus launch dsh 3. OpenAI Codex CLI auto-configured with responses wire API ./bin/nexus launch codex 4. OpenCode CLI with automated config injection ./bin/nexus launch opencode 5. Block Goose AI Agent via OpenAI provider ./bin/nexus launch goose 6. Aider Pair Programming CLI with DeepSeek R1 ./bin/nexus launch aider 7. ChatGPT Desktop macOS & local bridge ./bin/nexus launch chatgpt 8. Multi-Account Pool Monitor ./bin/nexus launch pool 9. DeepSeek Agentic Eval & Benchmark Harness ./bin/nexus launch harness Avoid rate limits HTTP 429 by cycling through multiple DeepSeek accounts using Round-Robin rotation: Add a new account ./bin/nexus auth add acc2 --chrome List accounts and check their status ./bin/nexus auth list Switch active account ./bin/nexus auth switch acc2 Validate all accounts in the pool ./bin/nexus auth test ./bin/nexus doctor nexus-cli/ ├── bin/ │ └── nexus Compiled binary executable ├── cmd/ │ └── nexus/main.go CLI command dispatcher ├── pkg/ │ ├── deepseek/ │ │ ├── pow.go Pure Go parallel DeepSeekHashV1 Keccak PoW solver │ │ ├── pow test.go PoW test suite & benchmarks │ │ ├── stream.go SSE JSON patch & OpenAI stream parser │ │ ├── stream test.go Stream tests │ │ ├── auth.go Token, session, and profile manager │ │ ├── chrome auth.go Automated Chrome CDP authentication │ │ ├── client.go DeepSeek Web API client Chat, Sessions, Auto-retry │ │ └── types.go Model configs and type definitions │ ├── server/ │ │ ├── server.go Local HTTP proxy server Routing, CORS, Auth │ │ ├── server test.go Server endpoint unit tests │ │ ├── openai.go OpenAI Chat Completions API adapter │ │ ├── anthropic.go Anthropic Messages API adapter for Claude Code │ │ └── session.go Agent session isolation and cleanup │ ├── launcher/ │ │ └── launcher.go Launchers for Claude Code, Codex, Goose, Aider, etc. │ └── cli/ │ ├── terminal.go ANSI styling, banners, and spinners │ ├── repl.go Interactive terminal chat & slash commands │ ├── runner.go Single-prompt and Unix pipe runner │ └── doctor.go End-to-end system diagnostics ├── main.go Application entry point ├── go.mod Go module definition ├── README.md Main documentation English ├── README.ru.md Russian documentation Русский └── README.uz.md Uzbek documentation O'zbekcha Distributed under the MIT License.