Muster

Name: Muster
Author: giantswarm

by giantswarm

Aggregating MCP server: one authenticated endpoint for every MCP server a platform runs, with meta-tool discovery, toolsets, OAuth 2.1 and SSO through Dex, and Kubernetes custom resources

40 3 tools GitHub

No known CVEs

Apache-2.0 license

Actively maintained

Last commit 0d ago

Works with most clients

Transport: stdio, sse, http

3 tools · ~133 tok

Grade A · 0.1% of 200K ctx

MCPpedia last refreshed this data 3h ago

Edit this pageView history

Muster is an MCP server that aggregating MCP server: one authenticated endpoint for every MCP server a platform runs, with meta-tool discovery, toolsets, OAuth 2.1 and SSO through Dex, and Kubernetes custom resources. Its tool list has not been published yet over stdio, sse and http, requires no API key, and scores 72/100 on MCPpedia's security, maintenance and efficiency rubric.

Security Data

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "muster": {
      "args": [
        "standalone"
      ],
      "command": "muster"
    }
  }
}

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[![MCPpedia Score](https://mcppedia.org/api/badge/muster)](https://mcppedia.org/s/muster)

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What Muster does

One MCP endpoint for every MCP server your teams run.

Test This Server

This server supports HTTP transport. Be the first to test it - help the community know if it works.

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Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

72/100across 5 weighted dimensions

How we score →

0255075100

−28

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

No package registry to scan.

Inventory

Tools (3)

Click any tool to inspect its schema.

~133 tokens total

Community

Reviews

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Frequently Asked Questions

Is Muster safe to use?: Muster has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under Apache-2.0.
How do I install Muster?: Muster supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can Muster do?: Muster provides 3 tools: Documentation, Contributing, License. See the full tools list on the server page for descriptions and parameters.
What AI clients work with Muster?: Muster is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is Muster actively maintained?: Muster is actively maintained - last commit was 0 days ago. It has 40 GitHub stars.

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muster

One MCP endpoint for every MCP server your teams run.

muster is an aggregating Model Context Protocol server. It connects to the MCP servers an organisation runs (a factory's MES and maintenance system, a service desk and its directory, a CRM and an ERP, Kubernetes and Prometheus, in-house tools) and serves all of their tools through a single MCP endpoint. AI agents connect once, discover tools through a small set of meta-tools instead of loading hundreds of tool definitions, and call them under the identity of the person they work for.

It runs as a single binary on a laptop, bridging an IDE to local and remote MCP servers, and as a Kubernetes service that gives a whole organisation one authenticated, observable tool gateway.

What it does

Aggregation. Registered MCP servers (stdio, streamable-http, sse) are connected, health-checked and reconnected; their tools appear as x_<server>_<tool>. Servers that offer the same tools for different targets can form a family and appear as one tool surface with an instance argument.

Discovery that fits a context window. Clients see thirteen meta-tools: list_tools, filter_tools, describe_tool, call_tool and their resource and prompt counterparts. Listings are paged and summarised; filter_tools ranks by relevance, so finding the right tool costs a few hundred tokens rather than the whole catalogue.

Toolsets. A request declares the tools it may see and call with the X-muster-Toolset header: built-in presets such as read-only, operator-defined presets, and inline selectors by server, pattern, workflow or label. An agent runs with exactly the surface it was given.

Authentication and single sign-on. muster protects its endpoint as an OAuth 2.1 resource server in front of Dex, keeps one session per person and forwards the person's identity token to the MCP servers that accept it, so every downstream call is made as that person. Remote servers with their own OAuth get a browser login once per person; AWS-hosted servers can be signed with SigV4.

Kubernetes-native. MCPServer, Workflow and WorkflowExecution are custom resources reconciled by muster, with status, conditions and events. The Helm chart ships the CRDs, RBAC, network policies, a Prometheus rule set and a Grafana dashboard.

Workflows. Multi-step procedures become deterministic tools (workflow_<name>) with templated arguments, conditions, forEach loops (nested, with bounded parallelism) and parallel steps, paged listings, jq result projection and a durable execution record.

Observability. OpenTelemetry traces, Prometheus metrics and structured logs for every session, server and tool call.

Frequently Asked Questions

Is Muster safe to use?

Muster has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under Apache-2.0.

How do I install Muster?

Muster supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can Muster do?

Muster provides 3 tools: Documentation, Contributing, License. See the full tools list on the server page for descriptions and parameters.

What AI clients work with Muster?

Muster is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.

Is Muster actively maintained?

Muster is actively maintained - last commit was 0 days ago. It has 40 GitHub stars.

muster

One MCP endpoint for every MCP server your teams run.

It runs as a single binary on a laptop, bridging an IDE to local and remote MCP servers, and as a Kubernetes service that gives a whole organisation one authenticated, observable tool gateway.

What it does

Observability. OpenTelemetry traces, Prometheus metrics and structured logs for every session, server and tool call.

Muster

Install in your client