Callio is a unified API gateway for AI agents. Instead of managing auth, rate limits, and keys for every API your agent uses, connect them all through one proxy. Works with Claude Code, Cursor, Antigravity, and any MCP-compatible tool. Browse APIs, generate a single Callio key, and start calling — we handle auth injection, usage tracking, and billing. Free tier included. One key, every API, zero config

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Hey Product Hunt! 👋

I built 𝐂𝐚𝐥𝐥𝐢𝐨 because connecting AI agents to external APIs is a mess. Every API needs its own key, auth setup, and error handling. It doesn't scale.

𝐂𝐚𝐥𝐥𝐢𝐨 fixes this with one unified API key that works across every API in our marketplace.

➜ Browse APIs on callio.dev
➜ Click "Add to Agent" to get your key
➜ Your agent calls our proxy, we handle auth and rate limiting

𝐖𝐡𝐲 𝐂𝐚𝐥𝐥𝐢𝐨:

✅ 𝐌𝐂𝐏 𝐒𝐞𝐫𝐯𝐞𝐫 support for Claude, Cursor and Antigravity
✅ 𝐑𝐄𝐒𝐓 𝐩𝐫𝐨𝐱𝐲 for any AI framework
✅ Real-time 𝐮𝐬𝐚𝐠𝐞 𝐝𝐚𝐬𝐡𝐛𝐨𝐚𝐫𝐝

✅ 𝐅𝐫𝐞𝐞 𝐭𝐢𝐞𝐫 with 50 requests/month

🔥 You can try the APIs live at callio.dev/browse, no signup needed to explore!

One key. Every API. Zero config. Try it at 𝐜𝐚𝐥𝐥𝐢𝐨.𝐝𝐞𝐯 🚀

Congratulations on launch 🎉 Callio.dev looks useful 👌having a single place to manage and work with multiple APIs is something devs really need.

@abdullnafayy Thank you! I am glad you liked it. Please feel free to reach out if you need any help setting it up :)