Test and compare prompts across any AI provider. Bring your own keys.
io.github.promptster-dev/promptster
https://www.promptster.dev/mcp
HTTP
No auth required
Hosted endpoint — paste into any MCP client.
Where to find authoritative docs and source for Promptster.
Open MCP Agent Studio and connect this server to Claude, GPT, Gemini, DeepSeek and more — no install required.
Open Agent Studio