Connects Claude to Promptster's testing platform so you can compare prompt responses across 11 AI providers without leaving your editor. Exposes operations for running single prompts, comparing multiple providers side by side, and retrieving test history. You bring your own API keys for OpenAI, Anthropic, Google, DeepSeek, Groq, and others. Useful when you're prototyping and want to see which model gives better results for your specific use case, or when you need to validate that a cheaper model handles your prompt just as well. The MCP integration mirrors their web app's core compare functionality. Free tier includes 2,000 API calls per month across all connected providers.
claude mcp add --transport http promptsterhq-promptster https://www.promptster.dev/mcp