UTCP (Universal Tool Calling Protocol) is an open standard for AI agents to call tools directly, positioned as a lightweight alternative to MCP. It eliminates the "wrapper tax" for lower latency by using a simple JSON manifest to connect to native APIs.
This is the 2nd launch from UTCP. View more
UTCP Agent
Launched this week
Open-source SDK which allows you to build custom agents which with any tool or native endpoint, with only 4 lines of code.
UTCP has collectively +1k GitHub stars, +5k downloads, and is trusted by engineers at AWS, Microsoft, NVIDIA, etc...
Free
Launch Team
UTCP
Hi Product Hunters,
I’m Ali, one of the faces behind UTCP Agent alongside @juan_viera_garcia1 , @radulescu_razvan , @andrei_stefan_ghiurtu, Bek, and the rest of the contributors.
For context, we built UTCP as a lightweight alternative to MCP that leverages existing infra and enables direct tool calling.
In the same philosophy of simplicity, we’re now launching UTCP Agent, which allows you to spin up a tool-calling agent within your infrastructure in just 4 lines of code. That’s all.
I think more of our creative energies should be channeled into building cool and useful agent workflows, and less into worrying about cumbersome infra problems. Would love to see what you come up with!
Always feel free to hit us up (our Discord) or, if you want to join our team, check out our GitHub.
Finally, would love your feedback and support here!
@juan_viera_garcia1 @radulescu_razvan @andrei_stefan_ghiurtu @aliraza36580 Incredible!! Rooting for you guys.
UTCP
@joelhainzl appreciate the support!
Congrats on the launch!
I love the simplicity of the JSON manifest approach — feels like it lowers the barrier for tool builders a lot.
Agnes AI
4 lines of code to build custom tool-calling agents? That’s wild—setting up integrations always eats up my afternoon. How does it handle authentication with different tools?