AI agents call LLMs, invoke tools, and hit APIs — but have no built-in way to cap spend. A single agent loop can burn hundreds of dollars before anyone notices. Cycles MCP Server gives any MCP-compatible agent a runtime budget authority: tools to check, reserve, spend, and release budget before and after every costly operation. Works with Claude Desktop, Claude Code, Cursor, Windsurf, and any MCP host. Supports per-tenant budgets, soft-landing caps, and automatic heartbeat for long-running operations.
Tools
cycles_reserve
cycles_commit
cycles_release
cycles_extend
cycles_decide
cycles_check_balance
cycles_list_reservations
cycles_get_reservation
cycles_create_event
Server Config
{
"mcpServers": {
"cycles": {
"command": "npx",
"args": [
"-y",
"@runcycles/mcp-server"
],
"env": {
"CYCLES_BASE_URL": "http://localhost:7878",
"CYCLES_API_KEY": "<YOUR_API_KEY>"
}
}
}
}