What is MCP?
The Model Context Protocol (MCP) is an open standard that connects AI agents to tools, data, and services. It's the plumbing of the agent economy — and the plumbing carries money.
How it works
MCP lets any client (Claude Code, Cursor, Hermes) discover and call tools from any server.
Tools can do anything — including trigger paid services and payments.
Why MCP matters for spend
Every tool an agent calls is a potential purchase.
A tool in a retry loop calls the same paid endpoint repeatedly.
There's no budget enforcement in the MCP spec itself.
The control layer
sipi.bot is a native MCP tool: agents call it before spending and get APPROVED, BLOCKED, or FLAGGED.
FAQ
Does MCP have built-in spend controls?
No — the protocol defines tool access, not budgets. Spend control is an extra layer.
How do I add sipi.bot to an MCP client?
One config entry — see the MCP integration page.
Related
Stop the next $12,400 night.
One API call (or MCP tool) in front of every agent transaction — APPROVED, BLOCKED, or FLAGGED, deterministic, ~5 ms, fully logged.
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