OpenWebUI MCP server (FastMCP)
View on GitHub ↗Homepage ↗Open WebUI MCP server built on FastMCP (standalone, v4) and the openwebui-sdk library
Lets any MCP client (Claude Desktop, Cursor, agents) ask Open WebUI models through the full tool-calling loop, not just plain chat
[!NOTE] The Open WebUI SDK, the Open WebUI CLI and this MCP server are tested against Open WebUI 0.6.5
Codex CLI (~/.codex/config.toml) - register the server as owui and let it call tools without approval:
Claude Desktop (claudedesktopconfig.json):
The quick start uses stdio, so each client spawns the server locally. For remote HTTP transports, open the collapsible options below (or see Run)
SSE setup (Claude Desktop and other SSE-capable clients)
Claude Desktop (claudedesktopconfig.json) - SSE endpoint is http://:8000/sse:
Streamable HTTP setup (Codex CLI, rmcp, agents over HTTP)
Codex CLI (~/.codex/config.toml) - streamable-http endpoint is http://:8000/mcp:
A bare http://:8000 returns 404 on initialize; point the client URL at the full /mcp path. rmcp and other streamable-http clients use the same URL
The repo ships a skill that makes an agent consult the ask tool eagerly instead of only when it happens to choose to:
It instructs the agent to call mcpowuiask before answering every explicit or implicit question (advice, explanations, recommendations, troubleshooting, follow-ups), pass relevant conversation context via history, keep remote tools enabled (usetools: true), and validate the OWUI answer against local evidence before replying. It also covers failure handling (retry, fall back, say it failed - never fake an OWUI result).
From the project README.
Add the radar badge to your README — it shows your project was picked up by MCP Radar and links to this page:
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