Almost every proxy provider's page carries an uptime figure: 99%, 99.9%, 99.99%. These numbers sound very close to one another, but their practical meaning is worlds apart. The gap is the difference between "one coffee break a month" and "one business day a month".
In this article we cover what uptime figures really amount to, what an SLA does and does not commit to, and how to set up your own measurement.
What the Percentages Mean in Practice
A 30-day month is 43,200 minutes. Multiplying the percentage by that number is all it takes. The "one tenth" difference between 99% and 99.9% cuts monthly downtime by a factor of ten.
In a data operation at scale, seven hours of downtime means missing the daily collection target. The price difference between 99% and 99.9% is usually worth that risk.
What Exactly Does an SLA Commit To?
SLA (Service Level Agreement) is the provider's written commitment to a certain service level and its acceptance of a penalty when it fails to meet it. The critical point is this: an SLA is not a guarantee but a compensation agreement. It does not say that there will be no outages, but what will be done if there are.
| Clause | What to ask | Why it matters |
|---|---|---|
| Scope | Which component is measured? | If the gateway is up but the exit IPs are dead, "uptime" can still count as met |
| Measurement method | Who measures, from where, and at what interval? | A provider measuring from its own data center does not reflect real-world experience |
| Exclusions | Is planned maintenance out of scope? | Four hours of "planned maintenance" a month can make the SLA meaningless |
| Compensation | How much, and how is it paid? | Usually service credit; cash refunds are rare |
| Claim process | Who reports it, and within how many days? | In most SLAs, no credit is granted unless you file the claim |
In many SLAs, compensation is not automatic. You have to notice the outage and file a claim within a set period (usually 5–30 days). If you do not set up your own monitoring, you cannot exercise this right.
What Does Uptime Not Measure?
A proxy service can be "up" and still be useless to you. Situations the uptime figure does not cover but that affect you directly:
That is why uptime alone is an insufficient metric. Without adding success rate and median latency alongside it, you cannot get an accurate picture.
Set Up Your Own Measurement
The provider's status page reflects its own point of view. What matters to you is the success rate of requests made from your network, to your targets . A simple monitor is set up like this:
Send the check request to a neutral endpoint rather than to the target site; that way you can tell a block by the target apart from a fault in the proxy.
If you want to start manually, proxy checker tool runs bulk tests and reports each address's status, latency and exit IP; ping test measures pure network latency.
Telling Outage Types Apart
Not every error comes from the provider. When debugging, narrow down the source quickly:
A direct check request (without a proxy) tells you within seconds whether the problem is in your own internet connection.
Jobs That Require High Uptime and Jobs That Do Not
A high SLA is required
- Real-time price monitoring and dynamic pricing.
- Order and stock synchronization.
- Ad verification campaigns (time-windowed).
- Data feeds committed to customers.
You can be more flexible
- Overnight bulk data collection jobs.
- Periodic SEO rank checks.
- Research and one-off analyses.
- Development and test environments.
For jobs with a flexible time window, instead of paying for a high SLA, setting up retry and queue logic is usually more economical. During an outage, jobs wait in the queue and resume where they left off when the service returns.
Resilience: Not Depending on a Single Provider
Even the highest SLA does not eliminate a single point of failure. For critical operations, working with two providers is both cheaper and more resilient than buying 99.99% from a single provider.
Do not leave the secondary provider completely idle; keeping a small amount of traffic flowing at all times prevents surprises when it takes over.
Summary
An uptime percentage only becomes meaningful once it is converted into minutes: 99% is 7 hours a month, 99.9% is 43 minutes. An SLA is not a guarantee but a compensation agreement, and compensation is often not automatic. Uptime alone is insufficient; success rate and latency measurements have to be added alongside it. Measure from your own network, set up a diagnostic flow that quickly isolates the source of an outage, and keep a second source warm for critical work. To get started, proxy checker and ping test our tools produce enough data.