15 Best API Monitoring Tools for Your Business

If there’s one factor companies can’t afford in at this time’s aggressive panorama, it’s sub-optimal system efficiency.

Even worse is the case of a number of sub-systems failing and the technical workforce not being conscious of it. In important industries like banking, inventory buying and selling, and so forth., downtime can price thousands and thousands of {dollars} (or extra) each minute, whereas in others, there could be deadly buyer backlash. It’s virtually come to a degree the place attending to know an error earlier than your buyer does is not only good anymore; it’s necessary.

APIs, APIs, all over the place

It’s a world dominated by APIs, and also you possible hear and use the time period a number of instances a day. In case you’re a service supplier of any type, you might have APIs that others depend on, and there are APIs that you simply eat to maintain the enterprise working (Google Maps API, SERP APIs, and so forth.). However that is simply the tip of the iceberg. To these within the laptop programming world, an Utility Programming Interface (API) is a broad time period that covers extra than simply maps and purchases.

With out your realizing, every little thing in a software program system (sure, actually every little thing) is an API or exposes an API.


Earlier than we leap on to monitoring APIs, let’s take a second to grasp what an API is and what expanse of our software program system it covers. That can aid you reduce down on selections and higher resolve which APIs you wish to cowl and, subsequently, which instruments will probably be higher in your distinctive use case.

What’s an API?

Let’s start with the usual textbook definition earlier than we drill deeper utilizing on a regular basis enterprise vocabulary. If we ask Wikipedia about APIs, it has the next to say:

In laptop programming, an utility programming interface (API) is a set of subroutine definitions, communication protocols, and instruments for constructing software program. Generally phrases, it’s a set of clearly outlined strategies of communication amongst numerous elements. A very good API makes it simpler to develop a pc program by offering all of the constructing blocks, that are then put collectively by the programmer.

An API could also be for a web-based system, working system, database system, laptop {hardware}, or software program library.

The second line is important (emphasis is mine). It’s not simply net providers that rely as APIs. Working system calls, database system interactions, {hardware} alerts, software program libraries (code that different code can reuse) all fall into the ambit of an API as all of them current a well-defined, well-understood interface and set of protocols.

Now, on any given day, any of those APIs can cease working. Possibly the exhausting disk reached its restrict of enter/output operations per second, or the SSL certificates expired, or there’s an unspotted bug within the newest model of code getting used — all these conditions warrant fixed monitoring and quick motion when (ideally earlier than) the issue happens.

Appropriately, this text will counsel instruments that may monitor your utility in all of the areas, not simply information alternate between two programs.

The price of API downtime

It’s exhausting to quantify how a lot downtime hurts, however Gartner launched a research, which pegged the quantity at $300,000 per hour. It is a modest common, in fact. Take into account the enterprise loss brought on by an hour of downtime throughout, say, Black Friday low cost season. For extra horror tales of how malfunctioning/non-functioning APIs killed enterprise or worker spirit, see right here and right here.


Whereas the enterprise aspect of API downtime can’t be understated, there’s additionally a hidden loss that may be even better in the long term — workforce morale. Builders love automation and reliability in programs (really, all of us do; think about your mail server happening a number of instances a day!), and downtimes break their code and frustrate them. If these persist, the issues will quickly begin affecting different enterprise capabilities (gross sales and advertising and marketing) who will get bored with frequently dropping face in entrance of the shopper.

I’ve intently seen two companies die a near-death due to poor in-house monitoring programs, and I don’t have the guts to see it once more. 😐

Now, downtimes can’t be eradicated; in the true world, something can go improper at any time. However by having applicable monitoring programs in place, we are able to get to know the errors as they occur, typically even earlier than the shopper does!

With that in thoughts, let’s have a look at a few of the greatest API monitoring instruments available in the market.


An entire resolution for every kind of API monitoring (keep in mind our broad definition of an API from earlier?), Uptrends gives monitoring for web sites, APIs, servers, and extra. It touts a contented buyer base of 25,000, with names reminiscent of Vimeo, Microsoft, Volkswagen and extra, amongst its shoppers.


One distinctive function of Uptrends is browser-based testing. The service spins up precise totally different browsers to run your app/web site and gives an in depth metric on the way it performs.

However response instances and metrics are solely half the story. Uptrends additionally provide you with an in depth, asset-wise efficiency report, so you understand precisely what’s inflicting a bottleneck the place. When an error is encountered, the service takes a screenshot and sends it to you, so you’ll be able to see precisely the way it feels on the opposite finish of the equation. 🙂

All in all, Uptrends is a dependable and pleasant service trusted by many massive names.


The Dotcom-Monitor platform lets you configure a multi-task monitor system utilizing an HTTP/S process. With that, you’ll be able to monitor OAuth 2.0-based net APIs for availability, efficiency, and correct responses. By replicating a number of end-client requests and monitoring a SOAP net service, Dotcom-Monitor brokers confirm that information could be correctly exchanged between the API and an online utility.


When an agent detects an error, it checks it in opposition to the system’s filter. If the error just isn’t filtered out, the system fires an alert. You may configure a number of alert teams and arrange personalized alert schedules and escalation choices. Studies can be found in CSV, PDF, and TXT codecs. They present a number of and helpful metrics, reminiscent of response instances, downtime, and common efficiency by location.

Dotcom-Monitor pricing plans begin at $1.99 monthly and supply net service monitoring with assist for HTTP/S, Net API SOAP/REST, SSL certification examine, response validation, instantaneous alerts, and 30 monitoring places, amongst different options.


Checkly claims to be a state-of-the-art monitoring and testing resolution that caught lots of consideration, particularly within the JavaScript neighborhood with clients reminiscent of Vercel and Humio. You may monitor net APIs, in addition to web site transactions, flows in an actual browser. The one dashboard reveals you every little thing you should know concerning the correctness and efficiency of your app at any time.


I actually like how Checkly combines easy setup and ease of use with highly effective instruments to customise your checks. As an alternative of a easy ping, it makes use of full-fledged configurable HTTP checks to watch APIs. This additionally consists of setup/teardown scripts, which comes very helpful whenever you, for instance, wish to signal requests or clear up take a look at information.


One other factor that stands out is the highly effective REST API that allows you to orchestrate and automate your checks, for instance, with Terraform. It additionally allows customers to arrange fine-grained alerting together with Opsgenie, Pagerduty, or Slack. All-in-all an excellent resolution I see most attention-grabbing for contemporary DevOps groups.

Checkly provides a free plan for builders together with a 1-minute examine interval and world information middle places.

Higher Uptime

Higher Uptime is a contemporary monitoring service that mixes API, ping and uptime monitoring, incident administration, and standing pages right into a single superbly designed product.


The setup takes 3 minutes. After that, you get a name, e mail, or Slack alert, every time your API endpoint doesn’t work accurately. The primary options are:

  • API, Ping, HTTP(s),  SSL & TLD expiration, Cron jobs checks
  • Limitless telephone name alerts
  • Simple on-call scheduling
  • Screenshots & error logs of incidents
  • Slack, Groups, Heroku, AWS, and 100+ different integrations


Sematext is now fairly well-known amongst DevOps groups because of its suite of monitoring instruments designed to make sure end-to-end visibility into purposes and web sites. API monitoring is part of their artificial monitoring service, Sematext Synthetics.

Sematext provides a complicated API monitoring notification system you can customise to work on a number of totally different situations based mostly on errors and metrics. That approach, you’ll be able to arrange the device to do a double or triple-check earlier than sending an alert. You principally eradicate false positives within the course of and get extra correct alerts and keep away from alert fatigue.


Additional, apart from the easy but highly effective HTTP monitor that you simply’d anticipate in a great artificial monitoring and testing device, Sematext stands out with its complete browser monitor, which allows you to acquire net efficiency metrics and repeatedly take a look at important person journeys in your web site based mostly on scripted person interactions with the web site.

This implies you can take a look at past the web page load instances, go deeper, and have a look at detailed simulated person interactions with the web site like login and registration, add to cart and run search queries on the location.  A lot of widespread person interactions are offered out of the field.

Amazon CloudWatch

If in case you have infrastructure on AWS, CloudWatch can’t be really helpful sufficient. Apart from utility monitoring, CloudWatch additionally has infrastructure monitoring, serving to your DevOps workforce sleep peacefully at night time.

Picture supply: aws.amazon.com

As per the official description, CloudWatch provides:

  • Utility monitoring
  • System-wide visibility
  • Useful resource optimization
  • Unified operational well being

So, so long as you might have an AWS-only deployment, CloudWatch will have the ability to monitor your utility uptime, efficiency, useful resource utilization, community bandwidth, disk/CPU utilization, and so forth, offering a sturdy resolution to all kinds of monitoring.

Maybe essentially the most vital benefit with CloudWatch is that you simply nearly don’t must set something up. The AWS providers generate related logs and share them straight with CloudWatch, which finally ends up on a neat and simple-to-understand dashboard.

Picture supply: aws.amazon.com

From the dashboard, you can’t solely learn metrics (whereas the free plans supply as much as one-minute accuracy, paid plans can get you as shut as one-second accuracy, successfully permitting you to watch in real-time) but additionally create customized guidelines, arrange alarms, and when they need to journey, scan system logs in as many particulars as you would like, and extra.

Certain, not everyone seems to be on AWS, however most crucial and well-known digital companies are, which is why I assumed CloudWatch must be launched on this record. I’ll start to sound like a damaged horn at this level, however truthfully, when you’re on AWS, there’s simply no simpler solution to arrange monitoring than CloudWatch.

Wish to study AWS CloudWatch, study from the professional right here.

As for pricing, Amazon has saved it easy there as properly. There’s no per-month or annual lock-in. You resolve how a lot your want is, and also you pay solely in line with what you employ.

However above all, take a look on the free-tier providing and inform me it’s not potential to go for this service. 🙂



In case you stay by efficiency metrics and put the shopper expertise above every little thing else, Rigor is price a glance. The identify is well-chosen, as you will get as rigorous with the device as you need. 🙂


Some of the helpful options of Rigor is purposeful testing. In case you’re not into the testing lingo, don’t fear; purposeful testing refers back to the act of testing your entire movement of a transaction, and never simply give attention to a single endpoint.

In some methods, purposeful testing is extra vital than unit testing as a result of it implicitly covers unit testing and gives buyer expertise prediction straight.


As you’ll be able to see within the picture above, this purposeful take a look at has a collection of seven guidelines that represent a transaction.

Rule #1 is a request to seek for a selected artist within the API; then, Rule #2 is an assertion, which means we wish to implement that the artist we looked for is accessible; if these two exams are handed, the system strikes on to Rule #3, and so forth.

Within the instance above, the purposeful take a look at breaks at Rule #7, and stakeholders are instantly notified that there aren’t sufficient copies of the album “Funky Kingston.” Speak about specializing in enterprise than worrying about expertise items!

Rigor is a extreme service for critical enterprise that doesn’t thoughts paying a premium for one thing wonderful, so when you’re one, positively test it out.


Assertible manufacturers itself as the best API monitoring device and is primarily geared in direction of Testing and QA groups. So when you suppose you don’t have the in-house technical competence to wrestle with JSON, XML, and writing code, Assertible is price a glance.


The USP of Assertible is partaking and simple: Your QA and Testing groups can create exams and confirm/monitor them utilizing the Assertible interface. It integrates completely with GitHub, so your data base stays with you, apart from working seamlessly with Slack.

The total-circle integration and evaluate performance permits nearly anybody in your workforce (even challenge managers) to create exams and evaluate efficiency metrics.


Okay, the state of affairs within the screenshot above might sound a bit unrealistic (one-minute issue-resolution), however it’s potential when suggestions is evident and quick. The zero absence of coding required implies that exams could be created as rapidly as your QA groups can sort, and as soon as accomplished, could be utilized time and again. That is in stark distinction to the observe of “handbook testing” adopted at most firms, the place a single tester can take a number of days to cowl the app, and but miss out on extra wonderful particulars merely on account of oversight or exertion.

For as little as $100 a month (which is their high plan, by the way in which), Assertible lets you monitor as many as 50 net providers, a complete of fifty,000 exams, and 20 workforce members. Take into account the price of having a QA working full-time to create and manually run via exams, and it’s apparent that Assertible provides exponential effectivity.


Relating to end-to-end testing and monitoring of purposes, BlazeMeter is the behemoth that eats every little thing else for lunch. On the similar time, although, it’s not for the faint of coronary heart or these searching for a easy API monitoring resolution that doesn’t demand a lot.

BlazeMeter is one thing you get married to, after which it retains paying off over the lifetime of the app.


The largest plus level of BlazeMeter is integration with Apache JMeter, arguably the default efficiency measurement device for giant net purposes. Sure, with BlazeMeter, you’re free to decide on open supply testing frameworks and analyze them simply through easy dashboards.

The plans are expensive, and in case your utility can see as much as 5,000 concurrent customers, it’s going to price you $649 monthly to make use of BlazeMeter. Fastened prices plans can be found for even bigger workloads, which the norm given the type of shoppers BlazeMeter has: Pfizer, Adobe, GAP, NFL, Atlassian, to call a number of.

It’s not as if BlazeMeter can’t be utilized in less complicated methods. Like most different API monitoring instruments, it does present purposeful testing (they name them “situations”), which could be accomplished utilizing an intuitive GUI front-end.


That stated, BlazeMeter is constructed for builders. By means of it’s devoted testing device Taurus, BlazeMeter exposes a  DSL (Area Particular Language) that can be utilized to write down generic exams that may be run in opposition to JMeter, Selenium, and different in style open-source instruments. And don’t let the point out of a DSL fear you; it’s nothing greater than a glorified YAML (.yml extension) file:

- concurrency: 100
  ramp-up: 1m
  hold-for: 1m30s
  state of affairs: easy

    think-time: 0.75
    - http://blazedemo.com/

Spend a while with Taurus, and your builders will be glad about with the ability to write intricate, reusable exams!

All in all, BlazeMeter is a heavyweight for the heavyweights.


Now part of Cisco, AppDynamics has been within the net utility monitoring recreation for a very long time and is kind of well-known. At current, AppDynamics is a collection of instruments to unravel a broad vary of efficiency and monitoring necessities of a contemporary SaaS workforce.

So far as pure API/microservice monitoring goes, the suite provides Microservice IQ. With this service, you’ll be able to monitor and analyze a microservice cluster of nearly any scale, preserving the historical past and letting you correlate it with adjustments within the cluster. At any price, this at the least lets you simulate the impression of including/eradicating nodes from the cluster.

The identical goes for monitoring real-time metrics, which could be accomplished at a cluster-level or node-level, presenting you each the big-picture view and the acute element, as wanted.


As you’ll be able to see within the screenshot, Docker monitoring is constructed proper in, which will probably be appreciated by groups with their infrastructure working on Docker (virtually everybody, that’s 🙂 ).

Apart from this, cloud monitoring and DevOps monitoring are additionally obtainable, which work throughout numerous IaaS suppliers reminiscent of Amazon AWS, Azure, Pivotal, and so forth. Steady suggestions is accessible throughout your complete supply pipeline, offering confidence and a stable basis in your DevOps workforce.

The icing on the cake is the combination of Machine Studying into the very coronary heart of the system. For example, typically you don’t know the perfect baseline in your app, however because the enterprise is working easily, you’ll be able to settle for the present metrics as a baseline.

So, how do you go about calculating the baseline? It’s exhausting when you might have 1000’s of knowledge factors streaming in each hour, however not if there’s a succesful machine studying system working.


How does this assist companies? Right here’s an instance. If you understand your baseline for uptime is 98.5%, and also you’re at the moment working at 98.6%, you’ll be able to have actual peace of thoughts. Apart from, getting access to actual, exhausting baselines saves you from over-engineering and costly migrations that some consultants would possibly advocate to push for “six nines” (99.9999% uptime).

The ML system can be clever sufficient to determine and report the one explanation for failure amongst a cluster of microservices from contained in the code (that’s essentially the most spectacular half!), so your groups know precisely what to repair. The screenshot beneath reveals how the system can drill down right into a Java Spring-based REST service and level to the Bean that failed.


It’s not potential to cowl all of the jaw-dropping options right here, so be happy to take a look at the official docs.

New Relic

In accordance with many, New Relic is the market chief in utility efficiency monitoring instruments, and for a great cause. It’s utilized by giant and small firms alike — from Fortune 500 behemoths to small, nimble startups — and provides an excellent mixture of precision and element.

The New Relic workforce prides itself on its deep understanding of DevOps, and so accordingly, this providing is constructed to supply an entire, real-time view of your infrastructure.

The largest USP of New Relic is the intuitive structure of your entire system, which helps you to immediately see how every little thing is flowing and precisely the place the bottleneck, if any, is. It’s exhausting to explain the UI in phrases, so right here’s a screenshot:


As you’ll be able to see, it’s fairly straightforward to visually hint how information is flowing from system to system and the ensuing efficiency metrics there. Sluggishness and downtimes set off instantaneous alerts, permitting them to repair the issues earlier than the enterprise suffers.

It’s not simply the DevOps aspect that’s lined in New Relic. It’s additionally potential to set objectives and guidelines for buyer expertise and get detailed experiences to determine the place extra work is required. As any digital marketer price his salt is aware of, this data is stable gold.


There’s no finish to the ingenious dashboard at New Relic. Check out this one, for instance, which maps out your entire utility cluster by nodes, and gives stay suggestions on what’s occurring at every node.


So, whether or not your utility is straightforward or advanced, New Relic can supply lots of attention-grabbing insights.

API Fortress

Subsequent in line is API Fortress, which goals to be a Swiss-army-knife of API monitoring for numerous groups in a company, and does it fairly properly.


Geared toward each testers and builders, API Fortress permits the creation of visible, collaborative exams like some other fashionable API monitoring device on the market, after which stroll just a little extra distance relating to comfort and options. The 2 I like most are Load Testing and Mocking.

For builders, API Fortress can create a take a look at suite from a given API specification. So, when you observe Swagger, OpenAPI, or RAML, half of the work is already accomplished. API Mocking permits your dev groups to outline the interface of the brand new API as a mock service, upon which the QA groups can begin constructing the take a look at suites instantly. No extra tiring, lengthy waits for the precise API to complete earlier than QA can get began!


API Fortress additionally works with all main CI/CD programs, assuaging another ache level of integration. Lastly, rock-solid load testing and monitoring are additionally built-in, making API Fortress an entire bundle for growth and testing groups for quickly testing and monitoring APIs.

API Science

With API Science, you get to check your APIs with an API. Though that does sound like a elaborate approach of claiming the identical factor, API Science does include a number of novel options which can be prone to attraction to many. The primary one is full-stack monitoring of your API stack, which suggests masking exterior APIs as properly.

It occurs many instances that your APIs are performant and responsive, however the ones your small business depends upon are down. Additionally, in some instances, there isn’t any goal floor declare which API was down at which period, a battle that may flip right into a type of chilly warfare between two API suppliers.

In such instances, API Science works as an indeniable center floor that may present the historic availability of APIs.


The second cool function is the distributed testing of APIs. API Science screens your APIs from a number of places throughout the globe and allows you to understand how the API is behaving for various places. Mix all this practice JavaScript in your monitoring system, and you’ve got a near-ideal API monitoring device. 🙂


With full end-to-end protection, APImetrics’s API monitoring does a unbelievable job of letting you understand of points even earlier than they’re reported by your customers. You may monitor from over 80 totally different places and get real-time alerts straight to your most popular device, which incorporates e mail, Slack, Pager Obligation, and different related ones.

Aside from that, it helps you to look via the API functioning, whether or not it’s DNS lookup or processing instances of the server as a way to verify that transactions are accomplished as they need to be. It is a fairly helpful function, and on condition that APImetrics is tremendous easy to arrange normally, makes issues even higher.

This service can deal with any sort of API requests, set situations, outline assertions and provide you with insights for numerous areas, together with connectivity points.


Moesif is a extremely user-centric device that tracks person expertise in your APIs. It helps you to monitor API points which can be impacting clients and take proactive motion to repair them.

Moesif API monitoring

The ‘alert guidelines’ function helps you to monitor numerous metrics and warn you every time a threshold is breached, for instance, a sudden surge within the variety of web site guests or a spike in CPU utilization. You may combine this device with collaboration instruments reminiscent of Slack to get alerted at a workforce stage.

The ‘person notification’ function offers you the record of consumers or guests who’ve used your API and their conduct, which can assist you in advertising and marketing, retargeting, and buyer retention. You can even combine Moesif with CRM instruments like Hubspot and Salesforce to bolster your advertising and marketing automation.

The device provides a number of prebuilt workforce dashboards for various initiatives or departments to give attention to what’s vital to them.

Moesif provides a free trial for 14 days and paid plans begin at $85 monthly.


With that, my high suggestions for API monitoring come to an finish. I did my greatest to not limit APIs to the slim definition they get labeled with more often than not. Proper from enterprise homeowners to builders, testers, QA, and challenge managers, there are instruments on this record that work for everybody.

Subsequent, learn how to safe APIs.

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