AI Agent Runaway Spend Index
A recurring benchmark for autonomous agent cost failures: retry loops, MCP tool storms, delegated sub-agent fanout, paid data API polling, and the spend avoided by request-path controls.
April 2026 modeled incidents
| Failure mode | Uncontrolled | Controlled | Avoided |
|---|---|---|---|
| OpenAI retry loop | $7,200 | $250 | 96.5% |
| MCP browser automation loop | $1,840 | $120 | 93.5% |
| Sub-agent research fanout | $18,480 | $900 | 95.1% |
| Paid data API polling loop | $9,600 | $600 | 93.8% |
| Multi-tenant agent swarm | $134,400 | $6,000 | 95.5% |
Runaway spend index FAQ
What is the AI Agent Runaway Spend Index?
The AI Agent Runaway Spend Index is a recurring benchmark of modeled autonomous agent cost failures, including retry loops, MCP tool storms, delegated fanout, paid API polling, and avoided spend from request-path controls.
Why do runaway AI agents create cost risk?
Agents can loop, retry, delegate, and call paid tools or APIs much faster than humans. Without request-path budgets and kill switches, small mistakes can become expensive incidents before dashboards report the damage.
How does SatGate reduce runaway agent spend?
SatGate reduces runaway agent spend by enforcing per-request budgets, MCP tool cost policy, revocable capabilities, delegation caps, audit requirements, and kill switches before upstream calls execute.
Which failure modes does the index track?
The index tracks OpenAI retry loops, MCP browser automation loops, sub-agent research fanout, paid data API polling loops, and multi-tenant agent swarms.
How should teams use the index?
Teams should use the index as a control-plan checklist: price expensive tools, set per-request and session budgets, cap delegation, require revocable capabilities, and block loops in the request path.
Use the index as a control-plan checklist
The pattern is consistent: agent spend incidents are not solved by better dashboards. They are solved by request-path budget enforcement, MCP tool cost policy, revocable capabilities, delegation caps, and kill switches before upstream calls execute.