Cycles — Budget Authority for AI Agents MCP Server

io.github.runcycles/cycles-mcp-server

Repository Registry

What is the Cycles — Budget Authority for AI Agents MCP server?

Runtime budget authority for AI agents — reserve, enforce, reconcile spend across providers

How to install Cycles — Budget Authority for AI Agents

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

CYCLES_API_KEY
required
secret
Cycles API key for authentication. Set CYCLES_MOCK=true for local development without a key.
CYCLES_BASE_URL
required
URL of the Cycles server (e.g. https://api.runcycles.io). Required unless CYCLES_MOCK=true.
CYCLES_MOCK
Enable mock mode for local development — no API key or live server required.
CYCLES_DEFAULT_TENANT
Optional default tenant merged into any tool call that omits it (explicit fields win).
CYCLES_DEFAULT_WORKSPACE
Optional default workspace merged into any tool call that omits it (explicit fields win).
CYCLES_DEFAULT_APP
Optional default app merged into any tool call that omits it (explicit fields win).
CYCLES_DEFAULT_WORKFLOW
Optional default workflow merged into any tool call that omits it (explicit fields win).
CYCLES_DEFAULT_AGENT
Optional default agent merged into any tool call that omits it (explicit fields win).
CYCLES_DEFAULT_TOOLSET
Optional default toolset merged into any tool call that omits it (explicit fields win).

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

{
  "mcpServers": {
    "cycles-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@runcycles/mcp-server"
      ],
      "env": {
        "CYCLES_API_KEY": "<YOUR_CYCLES_API_KEY>",
        "CYCLES_BASE_URL": "<YOUR_CYCLES_BASE_URL>",
        "CYCLES_MOCK": "<YOUR_CYCLES_MOCK>",
        "CYCLES_DEFAULT_TENANT": "<YOUR_CYCLES_DEFAULT_TENANT>",
        "CYCLES_DEFAULT_WORKSPACE": "<YOUR_CYCLES_DEFAULT_WORKSPACE>",
        "CYCLES_DEFAULT_APP": "<YOUR_CYCLES_DEFAULT_APP>",
        "CYCLES_DEFAULT_WORKFLOW": "<YOUR_CYCLES_DEFAULT_WORKFLOW>",
        "CYCLES_DEFAULT_AGENT": "<YOUR_CYCLES_DEFAULT_AGENT>",
        "CYCLES_DEFAULT_TOOLSET": "<YOUR_CYCLES_DEFAULT_TOOLSET>"
      }
    }
  }
}

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