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Author: 111coding

en/api-keys/chatgpt.html

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+# API Key Issuance
+
+To use AI services and external platforms in CodeFreeAI, you need an **API Key**. This guide explains how to get API keys for each service.
+
+---
+
+## 📋 Services Requiring API Keys
+
+### AI Services (4 Types)
+
+| Service | Provider | Free | Pricing | Guide |
+|---------|----------|------|---------|-------|
+| **ChatGPT** | OpenAI | ❌ | Pay-as-you-go | [Get Key](chatgpt.md) |
+| **Claude** | Anthropic | ❌ | Pay-as-you-go | [Get Key](claude.md) |
+| **Gemini** | Google | ✅ (Limited) | Free/Paid | [Get Key](gemini.md) |
+| **Grok** | xAI | ❌ | Pay-as-you-go | [Get Key](grok.md) |
+
+### Output Services (4 Types)
+
+| Service | Purpose | Free | Guide |
+|---------|---------|------|-------|
+| **INBLOG** | Blog Posting | ✅ | [Get Key](inblog.md) |
+| **Slack** | Team Messaging | ✅ | [Get Key](slack.md) |
+| **Telegram** | Messaging/Notif | ✅ | [Get Key](telegram.md) |
+| **Discord** | Community Messaging | ✅ | [Get Key](discord.md) |
+
+---
+
+## 🔑 What is an API Key?
+
+An API Key is **credentials** for accessing external services.
+
+[See API Key Details](what-is-api-key.md)
+
+**Key Points:**
+- 🔐 Store safely like a password
+- 💳 Charged based on usage (Paid services)
+- ⚡ Immediately usable
+
+---
+
+## 💰 Cost Information
+
+### Services to Start for Free
+
+✅ **Gemini** - 60 Free requests/min (Limited)
+✅ **INBLOG** - Unlimited Free
+✅ **Slack** - Unlimited Free
+✅ **Telegram** - Unlimited Free
+✅ **Discord** - Unlimited Free
+
+### Paid Services
+
+💳 **ChatGPT** - $0.15~$0.60 per 1M tokens
+💳 **Claude** - $3.00~$15.00 per 1M tokens
+💳 **Grok** - $2.00~$8.00 per 1M tokens
+
+**Note**: 1M Tokens = Approx. 750,000 words (English)
+
+---
+
+## 🚀 Quick Start Guide
+
+### 1️⃣ Start for Free
+
+If you are just starting, use **Free Services**:
+
+1. [Get Gemini API Key](gemini.md) - AI Text Generation (Free)
+2. [Create Telegram Bot](telegram.md) - Send Result (Free)
+
+**Complete in 5 mins:**
+```
+[Telegram Webhook] → [Gemini] → [Telegram]
+```
+
+### 2️⃣ Prepare for Production
+
+If you need better performance:
+
+1. [Get ChatGPT API Key](chatgpt.md) - General Purpose AI
+2. [Get Claude API Key](claude.md) - Long Document Processing
+
+---
+
+## 🛡️ API Key Security
+
+**NEVER reveal your API Key!**
+
+### ✅ Safe Usage
+
+- ✅ Set workflow to **Private**
+- ✅ Regenerate key periodically
+- ✅ Set usage monitoring
+- ✅ No upload to GitHub
+
+### ❌ Dangerous Usage
+
+- ❌ Include key in public repo
+- ❌ Share screenshots
+- ❌ Share with multiple people
+- ❌ Log in browser console
+
+[See API Key Security Details](security.md)
+
+---
+
+## 📊 Recommendations by Service
+
+### Usage Combinations
+
+**1. Personal Productivity Automation**
+- Gemini (Free AI)
+- Telegram (Free Notif)
+- **Monthly Cost: $0**
+
+**2. Team Collaboration Automation**
+- ChatGPT (High Quality AI)
+- Slack (Team Messaging)
+- **Monthly Cost: ~$20 (Usage based)**
+
+**3. Content Auto-Generation**
+- Claude (Long Docs)
+- INBLOG (Blog)
+- **Monthly Cost: ~$50 (Usage based)**
+
+**4. Advanced AI Workflow**
+- ChatGPT + Claude + Gemini (Multi-AI)
+- Slack + Telegram + Discord (Multi-Output)
+- **Monthly Cost: ~$100+ (Usage based)**
+
+---
+
+## 🎯 Next Steps
+
+### Get AI Service API Key
+
+1. [Get ChatGPT API Key](chatgpt.md) - OpenAI GPT-4o
+2. [Get Claude API Key](claude.md) - Anthropic Claude
+3. [Get Gemini API Key](gemini.md) - Google Gemini
+4. [Get Grok API Key](grok.md) - xAI Grok
+
+### Set Output Service
+
+1. [Get INBLOG API Key](inblog.md) - Auto Blog Posting
+2. [Slack Bot Setup](slack.md) - Team Messaging
+3. [Telegram Bot Setup](telegram.md) - Personal Messaging
+4. [Discord Bot Setup](discord.md) - Community Messaging
+
+---
+
+## ❓ FAQ
+
+**Q: Can I use it without an API Key?**
+A: Some nodes (Trigger, Http Response, etc.) work without it, but AI services require one.
+
+**Q: Is there a free trial?**
+A: Gemini allows limited free usage, others are pay-as-you-go.
+
+**Q: I lost my API Key**
+A: Regenerate key from the service provider and update your workflow.
+
+**Q: Can I reuse the same API Key?**
+A: Yes, but usage is aggregated.
+
+**Q: How to save API Key costs?**
+A: Consider Gemini (Cheap), Prompt Optimization, Caching, etc.