ClawCap vs. RelayPlane vs. ClawWatcher: Which OpenClaw Cost Tool Do You Need?

March 5, 2026 · 9 min read · Percy Kintu

Why Does OpenClaw Need Cost Tools at All?

OpenClaw is powerful because it gives AI agents real autonomy. They read files, write code, run commands, and iterate without waiting for human approval. That autonomy is also why a single agent can burn $50 in tokens before you finish your coffee.

The core issue is straightforward: OpenClaw has no built-in spending controls. There is no daily cap, no monthly budget, no kill switch. The --max-turns flag limits iterations but not cost. A single turn using Claude Opus 4 with a 100K-token context window can cost $0.50-$1.00 or more.

Three tools have emerged to address this gap, and they each tackle a different piece of the problem. Understanding what each one does (and does not do) will save you from picking the wrong one.

What Does the Feature Comparison Look Like?

The table tells the story in broad strokes. But the details matter, because each tool was built around a fundamentally different philosophy.

What Is RelayPlane Good At?

RelayPlane is a model routing proxy. It sits between OpenClaw and the API providers, analyzes each request, and decides whether that particular task needs an expensive model or whether a cheaper one will produce the same result.

The core idea is that not every agent request requires Claude Opus 4 at $5 per million input tokens. A simple file read, a grep command, or a routine code formatting task can be handled by GPT-4o mini ($0.15/M input) or Haiku ($0.80/M input) without any loss in quality. RelayPlane claims its heuristics identify 40-60% of requests as "simple" tasks that can be safely downgraded.

In practice, users report savings of $30-80/month on moderate workloads. The heuristics analyze prompt length, complexity markers, and task type to make routing decisions. For teams spending $150/month or more on API costs, the $12/month subscription typically pays for itself within the first week.

Where RelayPlane falls short

RelayPlane has no concept of a budget. It makes each request cheaper, but it does not stop your agent from making 10,000 requests in an hour. If your agent enters a retry loop or starts heartbeating every 3 seconds, RelayPlane will dutifully route each request to the cheapest model -- but the costs still accumulate without bound.

There is no kill switch. There is no daily or monthly cap. If you walk away from your machine and your agent goes rogue, RelayPlane will make the disaster 40% cheaper, but it will still be a disaster. It also has limited provider support compared to ClawCap, so check their docs to confirm your providers are covered before committing.

What Is ClawWatcher Good At?

ClawWatcher is a monitoring tool. It gives you a clean web dashboard that shows real-time token usage, cost per session, cost per model, and historical trends. It is completely free and open source.

The dashboard is genuinely well-designed. You get per-session breakdowns showing exactly which agent session cost what, down to individual requests. The historical charts let you see cost trends over days and weeks. For teams that have no idea where their OpenClaw budget is going, ClawWatcher provides the visibility to at least understand the problem.

Users particularly like the model breakdown view, which shows you what percentage of your spend goes to each model. This is the kind of data that helps you decide whether to switch models or configure OpenClaw's model preferences differently.

Where ClawWatcher falls short

ClawWatcher is primarily a monitoring tool with basic budget alerts. While it does offer some budget protection features, it lacks the depth of enforcement that a proxy-level tool provides. When your agent burns $47 overnight on a stuck loop, ClawWatcher's alerts may notify you — but by then, the damage is usually done.

There is no kill switch. No loop detection. No heartbeat protection. ClawWatcher is closer to a dashcam than a brake pedal. It tells you what happened after the money is already gone. The email alerts help, but by the time you read an email and manually kill the process, the damage is usually done.

What Is ClawCap Good At?

ClawCap is a spending cap proxy. It sits between OpenClaw and the API providers as a local proxy, tracks every request's token cost in real time, and returns a 429 status code the instant your budget is exceeded. The agent stops. No negotiation.

The daily cap is the core feature. Set it to $5, $20, $100 -- whatever your budget allows. When cumulative spend for the day hits that number, every subsequent request gets blocked with a clear error message. The monthly cap works the same way across a longer window.

But caps alone are not enough if your agent is wasting money on patterns that produce no value. That is where heartbeat detection and loop detection come in. Heartbeat detection identifies periodic "check-in" calls that OpenClaw agents make every few seconds when idle -- these cost $3-5/day for no productive work. ClawCap blocks them after the pattern is detected. Loop detection catches agents stuck in retry cycles, where the same request (or the same error) repeats over and over. ClawCap uses graduated escalation: warn, then throttle, then block.

The kill switch is available via CLI (clawcap kill) and via Telegram. If you are on your phone and get an alert that your agent has hit 80% of its daily cap, you can tap /kill and the agent stops immediately. When you are ready, /resume brings it back. No SSH session required.

Where ClawCap falls short

ClawCap does not optimize your costs. It does not route requests to cheaper models. If you are sending every request to Opus when Sonnet would suffice, ClawCap will enforce your cap, but you will hit that cap faster than you need to.

The monitoring interface is CLI and Telegram-based, not a web dashboard. If you want charts and historical trends, ClawWatcher's dashboard is more polished. ClawCap's clawcap logs and clawcap status commands give you the numbers, but not the visual presentation.

How Do the Pricing Models Compare?

ClawWatcher is free, full stop. It is open source and runs a lightweight agent alongside your OpenClaw setup. There is no paid tier and no feature gating.

RelayPlane charges a flat $12/month. All features are included. Given that it claims 40-60% savings on token costs, the break-even point is around $20-30/month in API spend. If you spend less than that, RelayPlane costs more than it saves.

ClawCap has four tiers:

• Free: $5/day fixed cap, status and kill commands, heartbeat routing. Enough for casual users.
• Solo ($5/mo): Custom caps, prepaid wallet, heartbeat + loop protection, Telegram control. The sweet spot for individual developers.
• Pro ($15/mo): Multi-agent support, savings summary, email digests. For power users running multiple agents across projects.
• Agency ($49/mo): Multi-machine support, white-label, resale licensing. For teams and consultancies.

For most individual developers, the Solo plan at $5/month provides the full protection suite. The free tier is a reasonable starting point, but the fixed $5/day cap means you cannot customize it to your actual budget.

When Should You Use RelayPlane?

RelayPlane is ideal if you are already disciplined about monitoring your costs and you trust your agent not to go rogue. It makes your existing budget go further. But it is not insurance against runaway spending.

When Should You Use ClawWatcher?

ClawWatcher is a great first step for teams that have never tracked their OpenClaw costs at a granular level. The fact that it is free means there is no reason not to install it. Just do not mistake visibility for protection. Seeing the fire is not the same as having an extinguisher.

When Should You Use ClawCap?

ClawCap is especially critical for overnight and unattended agent sessions. The Telegram kill switch means you can respond to an alert from your phone in bed at 2 AM. The heartbeat and loop detection mean many runaway patterns are caught automatically before you even need to intervene.

Can You Use All Three Together?

Yes, and this is the recommended setup for anyone spending more than $100/month on API costs. The proxy chain looks like this:

OpenClaw -> ClawCap (local proxy) -> RelayPlane -> API Provider

ClawCap sits closest to OpenClaw as the final safety net. It enforces caps, blocks loops, and provides the kill switch. RelayPlane sits between ClawCap and the API providers, routing requests to the cheapest suitable model. ClawWatcher runs alongside, providing the dashboard and historical analytics.

In this configuration, RelayPlane reduces your per-request costs by 40-60%. ClawWatcher gives you full visibility into where the savings are happening and where money is still being spent. ClawCap guarantees you never exceed your daily or monthly budget regardless of what happens upstream.

A developer spending $150/month on API costs could reasonably expect this stack to reduce costs to $60-90/month (RelayPlane savings) while guaranteeing the number never exceeds whatever cap they set (ClawCap enforcement), with full visibility into the breakdown (ClawWatcher dashboard).

What Is the Bottom Line?

Each tool solves a different problem. Picking between them is not a question of which is "better" -- it is a question of which problem you have.

• Overpaying per request? RelayPlane. It routes to cheaper models and saves 40-60%.
• No visibility into costs? ClawWatcher. It is free and shows you everything in real time.
• Need to guarantee a maximum spend? ClawCap. It enforces hard caps and gives you a kill switch.
• All of the above? Use all three. They are complementary, not competing.

If you are forced to pick just one, ask yourself this: would you rather save money on each request (RelayPlane), see where the money goes (ClawWatcher), or make sure the money stops at a specific number (ClawCap)? That answer determines your tool.