Free
The Ultimate AI API Testing Tool
Test Claude, GPT, Gemini, Mistral, and Groq APIs in one powerful desktop application. Calculate token costs, manage API keys securely, and streamline your AI development workflow.
Promptly
Claude
OpenAI
Gemini
Mistral
Groq
System Prompt
User Message
Tokens: ~125 Cost: ~$0.002
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Features
A powerful desktop application for testing various AI APIs including Claude, GPT, Gemini, Mistral, and Groq.
Multi-Provider Support
Test APIs from Anthropic, OpenAI, Google, Mistral, and Groq all in one place.
Cost Calculation
Real-time token counting and cost estimation before sending requests.
Secure Storage
API keys are encrypted and stored locally. Your data never leaves your machine.
History & Templates
Save request history and create reusable prompt templates.
Cross-Platform
Available for Windows, macOS, and Linux.
Dark Mode
Easy on the eyes with built-in dark mode support.