ai-agent

CLIProxyAPI: Free AI Models

Name: CLIProxyAPI: Free AI Models
Author: router-for-me

Access free Gemini, GPT, Grok, Claude models through API, for startup founders, backed by 45k+ GitHub stars

From the repo · “Wrap Antigravity, ChatGPT Codex, Claude Code, Grok Build as an OpenAI/Gemini/Claude/Codex compatible API service, allowing you to enjoy the free Gemini 3.1 Pro, GPT 5.5, Grok 4.3, Claude model through API”

55,909 stars+683★ this week8,545 forksGoGuide quality 9/10 · reviewed Jul 26Updated 10/21/2026100% free · open source

What it does

CLIProxyAPI allows startup founders to access free Gemini, GPT, Grok, and Claude models through a unified API service, compatible with OpenAI, Gemini, Claude, and Codex

When to use it

•When you need to integrate AI models into your startup's application without incurring significant costs
•When you want to leverage the capabilities of multiple AI models through a single, unified API
•When you are looking for an open-source alternative to proprietary AI model APIs

Ready-to-paste prompt

curl -X POST -H 'Content-Type: application/json' -d '{'prompt': 'Write a product description for a new smartwatch'}' http://localhost:8080/v1/complete

Heads up: Make sure you have Go installed on your system, as CLIProxyAPI is written in Go and requires it to run. You can download the latest version from the official Go website if you haven't already.

Saves to your device

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/cliproxyapi && curl -fsSL https://workflowstacks.com/api/skills/cliproxyapi/claude-skill -o ~/.claude/skills/cliproxyapi/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How CLIProxyAPI: Free AI Models works

Codeflow

Free to inspect

CLIProxyAPI: Free AI Models is a very large Go project (~352k lines across 1192 code files, plus 6 test files). It is a full software project: use it through its install path rather than reading it end to end. Last commit this month, MIT license, has a test suite.

Size

Very large codebase

~352k lines · 1192 code files · days to read — use, don't read

Setup

Developer setup

A real software project. Use it via its install path; don't expect to read it all.

Runs on

Go · Docker

Needs API keys (.env)

Go 100%

Where to start reading

1
README.md
Start here — what it does and how to install it
2
AGENTS.md
The instructions the AI actually follows
3
cmd/server/main.go
Where the program starts running
4
go.mod
Dependencies and the commands it exposes
5
.env.example
The API keys and settings you must provide

What's in each folder

internal/Core code — the actual logic855 files

cmd/Command-line entry points6 files

examples/Examples you can copy143 files

docs/Documentation8 files

sdk/SDKs / client libraries259 files

auths/Folder1 files

assets/Images & static assets25 files

.github/CI / automation (GitHub Actions)9 files

READMEHas testsDocumentedCI checksDocker readyExamples includedMIT licenseUpdated this month

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/cliproxyapi && curl -fsSL https://workflowstacks.com/api/skills/cliproxyapi/claude-skill -o ~/.claude/skills/cliproxyapi/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

Quick Actions

Details

Creator

router-for-me

Language