open-multi-agent-canvas

Open Multi-Agent Canvas is an open-source multi-agent chat UI built with Next.js/LangGraph/CopilotKit that lets users manage multiple agents in one conversation and connect a built-in “MCP Agent” to MCP-compatible servers (e.g., via Standard IO or SSE).

Evaluated Mar 30, 2026 (21d ago)

Homepage ↗ Repo ↗ Ai Ml ai-agents multi-agent web-ui nextjs langgraph copilotkit mcp-client mcp

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

Security posture is only partially inferable from the README. It requires API keys and supports connecting to external MCP servers via SSE, which increases the importance of network egress controls and server trust. No documentation is provided here about TLS verification, secret logging hygiene, auth scoping, or rate limiting.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

You want a ready-made web interface for orchestrating multiple agents and tool access through MCP, with customization via MCP server configuration.

Avoid When

You require strict network isolation (SSE to external MCP servers) or you need an enterprise API with documented REST contracts, webhooks, and fine-grained auth semantics at the package level.

Use Cases

• Travel planning with multiple specialized agents
• Research workflows using MCP-connected tools/servers
• General-purpose multi-agent assistance
• Connecting external MCP servers (public or custom) via SSE/STDIO

Not For

• Teams needing a backend-only, headless API service without a UI
• Environments that cannot use third-party services for CopilotKit Cloud or OpenAI/LangSmith (if using the backend)

Interface

REST API

GraphQL

gRPC

MCP Server

Yes

SDK

Webhooks

Authentication

Methods: CopilotKit Cloud API key (NEXT_PUBLIC_CPK_PUBLIC_API_KEY for frontend) OPENAI_API_KEY (for optional MCP Agent backend) LANGSMITH_API_KEY (for optional MCP Agent backend)

OAuth: No Scopes: No

The README indicates API keys are required (CopilotKit Cloud for the frontend; OpenAI/LangSmith for the optional backend). No OAuth or explicit scope model is described.

Pricing

Free tier: No

Requires CC: No

Pricing is not described in the README. CopilotKit Cloud and optional OpenAI/LangSmith usage may incur costs, but details are not provided here.

Agent Metadata

Pagination

none

Idempotent

False

Retry Guidance

Not documented

Known Gotchas

⚠ MCP connectivity may depend on the specific transport (Standard IO vs SSE) and the external MCP server’s availability and compatibility.
⚠ Authentication/keys are required for CopilotKit Cloud and (optionally) for the backend agent; misconfiguration will block functionality.
⚠ The project is consolidated into the CopilotKit monorepo, so example/repo-specific behavior may differ from the latest code.

Alternatives

CopilotKit monorepo showcase multi-agent-canvas Custom LangGraph multi-agent apps with your own UI Other MCP client libraries/tools with your own orchestration OpenAI/LangChain agent dashboards built in-house

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API endpoint ↗ Agent guide ↗ Report inaccuracy

Scores are editorial opinions as of 2026-03-30.