Spend Control for Cursor
Cursor's agent mode runs autonomously — and autonomous agents buy things. A usage limit tells you after; sipi.bot decides before.
Why Cursor agents overspend
Agent mode can trigger API purchases and compute during long autonomous runs.
Retry loops on paid tools multiply spend without review.
Per-provider limits don't cover third-party merchants.
How it works
Register the sipi.bot MCP tool in Cursor and call sipi_guard before any spend. The response is deterministic: APPROVED, BLOCKED, or FLAGGED in ~5 ms.
Rules that fit Cursor workflows
Per-transaction cap for compute and API credits.
Merchant allowlist for known vendors.
Approval threshold so big purchases route to a human.
Rule example
{
"rules": [
{"type": "per_transaction_cap", "max": 200, "currency": "USD"},
{"type": "merchant_allowlist", "allowed": ["openai.com", "anthropic.com"]},
{"type": "approval_threshold", "over": 1000, "action": "flag"}
]
}Set once, enforced on every spend attempt.
FAQ
Does sipi.bot integrate with Cursor's native limits?
Native limits are per-provider and reactive. sipi.bot adds a pre-spend decision layer across all merchants — run both; they solve different problems.
Will it interrupt normal coding?
No — only spend actions trigger a check. Normal edit/compile loops never hit the tool.
What happens when a purchase is blocked?
Cursor's agent gets a BLOCKED decision with the reason. The money never moves, and the audit log records the attempt.
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.
See plans — from $99/mo Try a live check