# C1 by Thesys

> API that makes LLMs respond with interactive UI components

C1 is a Generative UI API that enables LLMs to respond with interactive UI elements like charts, forms, and cards in real time. It integrates with any LLM, framework, or MCP server using minimal code. It is designed for developers building AI-powered applications who want to reduce frontend UI overhead.

## At a glance

- **Company**: Thesys
- **Homepage**: https://www.producthunt.com/r/6ZB72OU36DIYQL?utm_campaign=producthunt-api&utm_medium=api-v2&utm_source=Application%3A+claude+access+%28ID%3A+284460%29
- **Pricing**: freemium
- **API available**: Yes
- **Self-hostable**: No
- **Launched**: 2025-09
- **Last verified**: 2026-05-11

## Categories

- developer-platforms
- agents
- code


## Capabilities

- real-time-streaming
- llm-integration
- ui-generation
- mcp-support
- multi-framework
- low-code-integration


## Alternatives




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Source: https://inforelay.ai/tools/c1-by-thesys/
Index: https://inforelay.ai/llms.txt