Agent Builder (C1 API) is an API middleware that transforms standard LLM text responses into live, adaptive user interfaces in real-time. It enables developers to build AI applications that respond with interactive forms, charts, cards, and tables instead of plain text, dramatically improving user engagement and reducing frontend development overhead.
Freemium
from $49/month
How to use Agent Builder by Thesys?
Integrate the C1 API into your existing AI stack in two steps: change your LLM endpoint URL to Thesys's API and integrate their React SDK. This allows your AI model to output structured UI components like forms or charts based on user queries. Developers can customize the UI to match their brand and set up configurable actions and workflows, enabling the creation of dynamic assistants, copilots, and data visualization tools without hardcoding every possible UI state.
Agent Builder by Thesys 's Core Features
Generative UI API: Converts LLM text completions into live, interactive UI components such as forms, charts, tables, and slides in real-time, eliminating static text responses.
OpenAI-Compatible Endpoint: Works seamlessly with any AI stack, language, or framework, supporting leading LLMs like OpenAI, Anthropic, and Google Gemini out of the box.
Full Customization & Control: Built on a flexible React SDK, it allows developers to bring their own UI components, apply custom styling, and match their company's design system.
Enterprise-Grade Infrastructure: Offers zero data retention, GDPR, SOC2, and ISO27001 compliance, with options for private deployment, VPC, and self-hosting for large organizations.
Supports Tool Calls & Actions: Connects to external data sources via tool calls and allows configuration of custom actions, callbacks, and workflows that run automatically.
C1 Artifacts API: Extends functionality to generate structured documents like slides and reports, billed separately from the core UI generation service.
Performance & Scalability: Enables teams to build AI frontends 10x faster and 80% cheaper, with configurable rate limits and usage controls for scaling applications.
Agent Builder by Thesys 's Use Cases
Adaptive AI Tutors: EdTech developers can create intelligent learning tools that provide personalized feedback, live content, and engaging educational interfaces that adapt to each student's needs.
Dynamic Data Analytics: Data scientists and analysts can build applications where AI queries return interactive charts and reports, allowing users to explore data visually in real-time.
AI-Powered Customer Support: Customer service teams can deploy AI agents that guide users through complex processes with dynamic forms and step-by-step interfaces instead of text instructions.
Interactive E-commerce Assistants: Retail companies can implement shopping copilots that show product comparisons, recommendations, and checkout forms based on natural language customer queries.
Financial Reporting Tools: Finance professionals can automate the generation of live financial dashboards, investment summaries, and market analysis reports triggered by simple prompts.
Internal Business Operations: HR and operations teams can streamline processes like onboarding, ticketing, or approvals with AI interfaces that generate the correct forms and workflows dynamically.
Agent Builder by Thesys 's Pricing
Free
$0/month
Free credits for developers exploring Generative UI. Includes $10 worth of LLM credits, style customizations, and Discord support.
Build
$49/month
Usage-based plan for small teams ready to ship. Includes higher request priority, higher rate limits, and email support.
Grow
$499/month
Usage-based plan for businesses. Includes highest priority, highest rate limits, priority Slack support, and dedicated solutions engineer (add-on).
Scale
Custom pricing
Secure deployments for large enterprises. Includes self-hosting, custom controls, SOC2/HIPAA compliance, and enterprise SLAs.
