CopilotKit

Frontend SDK and agent runtime for building agent-powered applications — provides CopilotRuntime (server-side) and React/Angular hooks for in-app AI agents with tool calling, state sharing, and generative UI.

Connects to: React, Angular, Next.js, Slack, OpenAI, Anthropic · · MIT 37,320★

Use it with an AI agent

Loadbay is an MCP server, so an agent can search the catalog and find this harness:

claude mcp add --transport http loadbay https://loadbay.xyz/api/mcp

• Source: https://github.com/CopilotKit/CopilotKit
• This harness as JSON: /api/harnesses/copilotkit
• Agent setup: /setup.md
• Browse all 700+ harnesses on Loadbay