Free AI Coding Help for Developers Who Need It
Many developers want to use powerful AI coding tools like Claude Code but hit paywalls or expensive subscriptions. AgentRouter is a free (public-welfare) AI API gateway built to help. It gives you free credits, one API key, and works with Claude Code, Codex, Gemini CLI, and other popular tools.
What You Will Learn
- What AgentRouter is and why it helps developers
- How to get free credits (no credit card needed)
- Exact steps to connect Claude Code in minutes
- How to use it with other AI coding tools
- Important tips so you avoid common mistakes
1. What Is AgentRouter?
AgentRouter is a unified large-model API gateway. Instead of managing separate accounts and keys for Claude, GPT, DeepSeek, Gemini and others, you get one endpoint and one key.
It is designed especially for AI coding. The site calls itself an “AI Coding public-benefit site”. They give free quotas to help developers build and learn without high costs.
Key points in simple words:
- One API key for many models
- Works with Claude Code (Anthropic-compatible)
- Also supports OpenAI-compatible tools
- Free credits on signup (often $100–$200 with referral)
- No subscription required to start
2. Why Developers Use It for AI Coding
Claude Code is excellent for writing, debugging, and understanding code. Official access usually needs a paid Anthropic plan. AgentRouter lets you point Claude Code at their free gateway instead.
Same idea works for other tools: change the base URL, add your free key, and keep coding.
This is useful when you are:
- Learning AI-assisted coding
- Building personal projects
- Prototyping before buying official plans
- Testing different models side by side
3. How to Get Started (Step by Step)
Step 1 — Create an account and get your free API key
Go to agentrouter.org/register?aff=ACtg and create your account (use the referral link to get free credits). Sign up. New users usually receive free credits. After signing up, open the console and copy your API key (it looks like sk-xxx).
Keep the key private. Never share it in public code or screenshots.
Step 2 — Install Claude Code (if you do not have it yet)
You need Node.js 18 or newer. Check your version:
node --versionThen install the Claude Code CLI:
npm install -g @anthropic-ai/claude-code@latestOr with pnpm / yarn if you prefer.
Verify it works:
claude --versionStep 3 — Set the environment variables
This is the most important part. Tell Claude Code to use AgentRouter instead of the official Anthropic servers.
On macOS or Linux:
export ANTHROPIC_AUTH_TOKEN="your-agentrouter-api-key-here"
export ANTHROPIC_BASE_URL="https://agentrouter.org"
export ANTHROPIC_MODEL="claude-opus-4-6"On Windows PowerShell:
$env:ANTHROPIC_AUTH_TOKEN="your-agentrouter-api-key-here"
$env:ANTHROPIC_BASE_URL="https://agentrouter.org"
$env:ANTHROPIC_MODEL="claude-opus-4-6"Replace the token with the real key from your AgentRouter console.
Note: For Claude Code the base URL is https://agentrouter.org (without /v1). Do not mix it with the OpenAI-compatible endpoint.
Step 4 — Start Claude Code and test
Go to any project folder and run:
claudeFirst test with a simple message such as “just reply OK”. Then ask it to list files in the current directory without changing anything. If it answers correctly, the connection works.
4. Using AgentRouter With Other Tools
AgentRouter also supports OpenAI-compatible endpoints at https://agentrouter.org/v1. Many tools that expect an OpenAI base URL can use it.
Examples of tools people connect:
- Claude Code (Anthropic style — use the settings above)
- Codex / other coding agents
- Gemini CLI style tools
- Custom scripts that call OpenAI or Anthropic SDKs
Always check the official AgentRouter docs for the exact base URL and model names your tool needs. The docs are at agentrouter.org/docs.
5. Important Tips and Warnings
- Free credits are limited. The site is a public-benefit project. Credits can run out. Use them for learning and prototypes, not heavy production traffic.
- Do not mix endpoints. Claude Code needs the Anthropic-compatible URL without /v1. OpenAI-style tools usually need /v1.
- Environment variables override official login. If you previously logged into a Claude Pro account, the AgentRouter variables take priority in that terminal. To go back to the official account, unset the three variables and restart Claude.
- Model names change. Common ones include claude-opus-4-6 and similar. Check the console or docs for current available models.
- Treat free gateways carefully. Public free services can have rate limits or temporary downtime. Keep a backup plan for important work.
6. Quick Checklist
- Account created via the referral link and free API key copied
- Node.js 18+ installed
- Claude Code installed globally
- ANTHROPIC_AUTH_TOKEN, ANTHROPIC_BASE_URL, and ANTHROPIC_MODEL set
- Tested with a simple “OK” reply and a read-only file list
- Key stored safely (not in public repos)
7. Summary
AgentRouter makes it easy for developers who need help with AI coding to get started without paying first. One free key, clear environment variables, and Claude Code (plus other tools) can work in minutes.
Follow the steps above, keep the key private, and use the free credits wisely while you learn or build.
Key Takeaway
Set three environment variables, point Claude Code at https://agentrouter.org, and you can start coding with free credits today.
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