sipi.bot limits
Spend limits for Amazon Bedrock agents
Amazon Bedrock agents orchestrate Nova and other models with native AWS Budgets and IAM scoping. AWS Budgets are monthly and alert-based; they do not block a transaction in real time. Here is how to add a deterministic pre-spend layer that blocks before the dollar moves.
What Amazon Bedrock provides natively
Bedrock inherits AWS Budgets (monthly, alert-only by default), IAM and service-control policies (scope which models/accounts can be invoked), and per-model provisioning limits. None of these evaluate a single transaction against a spend policy and block it in milliseconds. AWS Budgets also famously notify after the spend has occurred — the original incident this product was built to prevent.
Why that is not enough for autonomous agents
Autonomous agents need explicit spend limits because the alternatives — trusting the agent, the provider's monthly cap, or a human reviewer on every transaction — do not actually bound the risk. Provider caps are coarse and account-level. Human review does not scale. And agents have no native concept of a budget. A pre-spend firewall gives you a concrete, enforceable ceiling evaluated on every transaction in under 5ms.
The limits that matter for a Amazon Bedrock agent
| Limit type | What it catches | Example |
|---|---|---|
| Per-transaction cap | A single oversized call | Block any one model/tool spend over $5 |
| Daily total | Aggregate session burn | Max $50/day across all agent spend |
| Velocity cap | Retry & runaway loops | Max 30 Amazon Bedrock calls/minute |
| Category limit | Tool-call cost categories | Cap "long-context" calls at $10/day |
What happens when a limit is hit
When a transaction would exceed the limit, sipi.bot returns block with a reason code identifying which limit fired. The agent receives the decision as structured JSON and can choose an alternative path — retry with smaller scope, request human approval, or abandon the task. The blocked transaction is logged with the policy version, so you can always see exactly why it was denied.
Frequently asked questions
Does Amazon Bedrock block spend in real time?
No. The native controls described above are quotas, rate limits, IAM scopes, or monthly budgets. They throttle or alert; they do not evaluate an individual transaction against a spend policy and block it in milliseconds before the cost is incurred. That is the gap sipi.bot fills.
What limit value should I start with?
Start with the recommended default for your agent type, observe real traffic for a week, then tune. The right limit is the smallest value that does not interrupt legitimate work. If you are blocking more than 1% of transactions in steady state, the limit is probably too tight. Pair every dollar limit with a velocity cap (transactions per minute) — dollar limits catch the single large transaction, velocity caps catch the loop.
How does sipi.bot enforce this for a Amazon Bedrock agent?
Your agent calls evaluate_spend before any transaction (the model call, tool call, or provisioning action). sipi.bot checks it against your per-transaction caps, daily totals, velocity limits, merchant allowlists, and category rules, then returns approve, block, or flag — in under 5ms. The Amazon Bedrock request only proceeds if the decision is approve.