ChatTempMail New Open Source Tool: LLM API Key Checker - Batch Verify Multi-Platform API Keys
A New Addition to ChatTempMail's Open Source Ecosystem
ChatTempMail is excited to introduce a brand new open source project: LLM API Key Checker. This is a batch API key verification tool designed specifically for AI developers, helping you quickly detect and manage API keys across multiple LLM platforms.
π― Why You Need This Tool
With the widespread adoption of large language models, developers often need to manage API keys from multiple platforms, facing challenges like:
- β Keys may have expired, only discovered when trying to use them
- β Need to log into each platform individually to check balance
- β Manual testing for batch verification is inefficient
- β Managing multiple platforms is cumbersome
LLM API Key Checker solves all these problems in one place, supporting batch verification, real-time balance checking, and automatic detection of invalid keys.
β¨ Core Features
1. Multi-Platform Support
Supports 10+ major LLM platforms, including:
| Platform | Balance Query | Description |
|---|---|---|
| OpenAI | β | ChatGPT, GPT-4 Official API |
| Anthropic | β | Claude Series |
| DeepSeek | β | Supports balance query |
| Moonshot AI | β | Kimi Chat |
| Zhipu AI, Qwen, Groq, Gemini | β | Major domestic and international platforms |
| Custom Platform | Configurable | Any OpenAI-compatible endpoint |
2. Batch Verification
- Flexible Import: Supports spaces, newlines, commas, semicolons and other separators
- Concurrency Control: 1-50 concurrent requests, adjustable as needed
- Real-time Progress: Streaming response, displays results as they come
- Clear Status: Waiting, Verifying, Valid, Invalid, Insufficient Balance
3. Balance Query
Automatically retrieves account balance for supported platforms, with low balance threshold alerts.
4. Multi-Language Support
Built-in support for 20+ languages including Chinese, English, Japanese, Korean, Spanish, French, German, and more, with automatic detection or manual switching.
π Technical Highlights
Built with Next.js 16, React 19, TypeScript, and Tailwind CSS 4, featuring streaming responses for real-time progress display and high-concurrency verification. Check out the GitHub repository for detailed technical implementation.
π‘ Use Cases
- Developers: Batch verify key availability before project deployment
- Team Management: Check status and balance before distributing keys
- DevOps Monitoring: Regularly check production environment keys to avoid service interruption
- Multi-Platform Integration: Verify key configurations across different platforms
- Balance Management: Monitor account balance for timely top-ups
π Privacy & Security
- Zero Storage: All keys are only used during verification, not stored or logged
- Open Source Transparency: Code is fully open source and auditable
- Self-Hosted: Supports local deployment for complete data control
- HTTPS Encryption: All data transmitted securely
π οΈ Quick Start
Online Use
Visit https://check.chat-tempmail.com directly, no installation required.
Local Deployment
git clone https://github.com/Selenium39/llm-api-key-checker-next.git
cd llm-api-key-checker-next
npm install
npm run dev
For detailed deployment instructions, see the GitHub README.
π How to Use
- Select Platform: Choose the LLM platform to verify from the dropdown
- Configure Parameters: Set concurrency, verification prompt, balance threshold, etc.
- Import Keys: Paste API keys (supports multiple separators)
- Start Verification: Click the button to see real-time verification results
- View Report: Check valid/invalid keys and balance information
π€ Open Source & Contribution
- License: MIT License
- GitHub: https://github.com/Selenium39/llm-api-key-checker-next
- Contribute: Welcome to submit Issues, PRs, or feature suggestions
If you find it helpful, please give the project a β Star!
π― Future Plans
- More platform support (Doubao, Wenxin, Spark, etc.)
- Verification history and trend analysis
- Balance alert notifications
- Browser extension and CLI tool
π Related Resources
- Live Demo: https://check.chat-tempmail.com
- GitHub Repository: https://github.com/Selenium39/llm-api-key-checker-next
- ChatTempMail Main Site: https://chat-tempmail.com
Other ChatTempMail Open Source Tools
- Website Email Extractor: https://find.chat-tempmail.com
- Random Address Generator: https://address.chat-tempmail.com
- MCP Server: https://github.com/Selenium39/mcp-server-tempmail
Visit check.chat-tempmail.com now to try the tool. If you find it helpful, please give the project a Star β
ChatTempMail Team - Continuously providing practical open source tools for developers