Does AgentBrake proxy my LLM calls?

No. It hooks the agent in-process, so there's no proxy and no added latency in the request path.

Helicone has cost alerts — isn't that enough?

Alerts tell you after the spend. AgentBrake stops the run before the next call, so the spend never happens.

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AgentBrake vs Helicone

Helicone logs and monitors LLM calls through a proxy. AgentBrake runs in-process and stops the agent itself when it loops or blows a cost ceiling — no proxy in the path.

AgentBrake vs Helicone at a glance

	AgentBrake	Helicone
Stops a runaway run in real time	Yes — in-process, per run	No — logs & monitors
Records / traces runs	Basic live stats	Yes — its core strength
Identical-loop detection that halts	Yes	Observe only
Hard per-run cost ceiling that halts	Yes	Alerts, not stops
Free, source-available (FSL)	Yes	Varies
Setup	One line, no proxy	SDK / proxy / dashboard
Frameworks	LangChain 1.x & 0.x, CrewAI 1.x	Many

Helicone is an LLM observability platform and proxy/gateway. The two are complementary, not mutually exclusive — most teams keep their observability stack and add AgentBrake as the control layer that actually stops a run.

When to use which

Use Helicone for centralized logging, caching and gateway features. Use AgentBrake to enforce a per-run kill-switch in the agent process itself, with no extra network hop.

Stop your next runaway agent

One line of code. Open source. Works on LangChain 1.x, CrewAI 1.x, and the classic AgentExecutor.

$pip install agentbrake-sdk

Star on GitHub

Frequently asked questions

Does AgentBrake proxy my LLM calls?: No. It hooks the agent in-process, so there's no proxy and no added latency in the request path.
Helicone has cost alerts — isn't that enough?: Alerts tell you after the spend. AgentBrake stops the run before the next call, so the spend never happens.