Best API Monitoring Tools in the UK

Engineered for peak performance and efficient resource use, KrakenD can manage a staggering 70k requests per second on just one instance. Its stateless build ensures hassle-free scalability, sidelining complications like database upkeep or node synchronization. In terms of features, KrakenD is a jack-of-all-trades. It accommodates multiple protocols and API standards, offering granular access control, data shaping, and caching capabilities. A standout feature is its Backend For Frontend pattern, which consolidates various API calls into a single response, simplifying client interactions. On the security front, KrakenD is OWASP-compliant and data-agnostic, streamlining regulatory adherence. Operational ease comes via its declarative setup and robust third-party tool integration. With its open-source community edition and transparent pricing model, KrakenD is the go-to API Gateway for organizations that refuse to compromise on performance or scalability.

Sematext Cloud provides all-in-one observability solutions for modern software-based businesses. It provides key insights into both front-end and back-end performance. Sematext includes infrastructure, synthetic monitoring, transaction tracking, log management, and real user & synthetic monitoring. Sematext provides full-stack visibility for businesses by quickly and easily exposing key performance issues through a single Cloud solution or On-Premise.

Postman serves as a collaborative platform for developing APIs, designed to simplify the entire process of API creation and enhance teamwork, enabling the rapid development of superior APIs. The platform's features facilitate each phase of API construction, making it easier to collaborate and accelerate the creation of high-quality APIs. Users can quickly and effortlessly send requests for REST, SOAP, and GraphQL directly within Postman, optimizing their workflow. Additionally, it allows for the automation of manual tests, seamlessly integrating them into your CI/CD pipeline to safeguard against potential issues when code changes are deployed to production. API behavior can be communicated effectively by simulating endpoints and their respective responses without the need for a backend server setup. You can also generate and publish visually appealing, machine-readable documentation, which helps in making your API more accessible for users. Regular performance and response time checks ensure you stay informed about your API's health, allowing for proactive management. Lastly, Postman fosters a shared environment for API creation and consumption, enabling real-time collaboration among team members. Postman’s AI Agent Builder revolutionizes the development of AI agents with its no-code platform, enabling users to build, test, and deploy powerful agents without coding expertise. It provides access to a vast library of over 100,000 APIs and a variety of LLMs, offering tools to compare their performance, cost, and response quality. The visual workflow builder simplifies creating multi-step agent interactions, and its testing tools ensure reliability before deployment.

Site24x7 provides unified cloud monitoring to support IT operations and DevOps within small and large organizations. The solution monitors real users' experiences on websites and apps from both desktop and mobile devices. DevOps teams can monitor and troubleshoot applications and servers, as well as network infrastructure, including private clouds and public clouds, with in-depth monitoring capabilities. Monitoring the end-user experience is done from more 100 locations around the globe and via various wireless carriers.

Better Stack is an eBPF-based, AI SRE observability tool that helps you ship high-quality software faster. Monitor everything from websites to servers. Schedule on-call rotations, get actionable alerts, and resolve incidents faster than ever. Visualize your entire stack, aggregate all your logs into structured data, and query everything like a single database with SQL. Made to fit into your workflow with over 100+ integrations. Seamlessly integrates into your workflow with 100+ integrations.

Datadog is the cloud-age monitoring, security, and analytics platform for developers, IT operation teams, security engineers, and business users. Our SaaS platform integrates monitoring of infrastructure, application performance monitoring, and log management to provide unified and real-time monitoring of all our customers' technology stacks. Datadog is used by companies of all sizes and in many industries to enable digital transformation, cloud migration, collaboration among development, operations and security teams, accelerate time-to-market for applications, reduce the time it takes to solve problems, secure applications and infrastructure and understand user behavior to track key business metrics.

Uptrends is all about cloud-based website performance that keeps track of performance, uptime, and functionality of your websites and APIs. The 24/7 monitoring service that proactively test your website and monitor multi-step transactions. Let’s face it—the Internet is a fragile thing. Stuff breaks or slows every now and then. Uptrends lets you know when it does and what exactly happened. Feel free to try Uptrends for 30 days with our free trial!

Splunk AppDynamics is a comprehensive observability and security platform designed to optimize hybrid and on-prem applications. Unlike siloed monitoring tools, it connects application performance to measurable business outcomes such as revenue, conversions, and operational efficiency. The solution empowers teams to track critical business transactions like logins, shopping cart activity, and order processing, providing real-time visibility into bottlenecks. With AI-powered anomaly detection and root cause analysis, it ensures that performance issues are identified quickly and accurately. AppDynamics extends beyond performance monitoring by securing applications at runtime, blocking threats, and exposing vulnerabilities before they escalate. Its specialized support for SAP environments enables rapid issue detection, tracing down to ABAP code or database queries. Digital Experience Monitoring adds a customer-focused lens, offering web, mobile, and synthetic insights into user journeys. By combining business performance analytics, runtime security, and full-stack observability, Splunk AppDynamics helps organizations maximize reliability and deliver superior digital experiences.

Sauce Labs is the largest continuous testing cloud in the world for web and mobile apps. This gives development teams from the top digital brands the ability to deliver apps faster, without compromising on quality. With extensive device and testing coverage, streamlined beta distribution, best-in class error monitoring, and constant feedback loops during your app development cycle, you can release better mobile apps faster. Your mobile apps will always work in real-world scenarios on any device and browser. Sauce Labs' end-to-end solutions for mobile quality enable organizations to deliver mobile apps in a modern era of DevOps driven development. They can achieve quality and speed at all stages of app development - from conception to production. We have you covered, no matter what your testing needs are, the application type you're developing, or your role within the mobile SDLC.

IBM Instana sets the benchmark for incident prevention, offering comprehensive full-stack visibility with one-second precision and a notification time of just three seconds. In the current landscape of rapidly evolving and intricate cloud infrastructures, the financial repercussions of an hour of downtime can soar into the six-figure range or more. Conventional application performance monitoring (APM) tools often fall short, lacking the speed and depth required to effectively address and contextualize technical issues, and they usually necessitate extensive training for super users before they can be utilized effectively. In contrast, IBM Instana Observability transcends the limitations of standard APM tools by making observability accessible to a wider audience, enabling individuals from DevOps, SRE, platform engineering, ITOps, and development teams to obtain the necessary data and context without barriers. The Instana Dynamic APM functions through a specialized agent architecture, utilizing sensors—automated, lightweight programs specifically designed to monitor particular entities and ensure optimal performance. As a result, organizations can respond to incidents proactively and maintain a higher level of service continuity.

SolarWinds®, Loggly®, is a cost-effective, hosted and scalable multi-source log management system that combines powerful search and analytics with extensive alerting, dashboarding and reporting to help you identify potential problems and reduce Mean Time to Fix (MTTR). LOGGLY AT A GLANCE >> Full-stack log aggregation, log monitoring and data analytics Log analytics provides context and patterns for events, as well as anomalies that can be used to gain deeper insights. >> Highly scalable to ingest large data volumes and enable quick searching across large and complicated environments >> Spot usage patterns with application, service, and infrastructure-aligned historical analysis of user, log, and infrastructure data >> Manage by exception: Identify variations from the norm with powerful log formatting capabilities and analytic search capabilities

Website monitoring and performance testing solutions. You can quickly identify performance issues by using powerful monitoring features like real-time dashboards, performance reporting options, or nearly 30 global monitoring networks. The EveryStep Web Recorder allows you to quickly and easily record scripts that can be used to monitor interactive websites, web application elements, and user scenarios. Dotcom-Monitor makes sure that even the most complex websites, web apps, and web services are up to date and perform as intended.

Zunoy Uptime offers a comprehensive monitoring solution for websites and APIs, aimed at ensuring service reliability and swiftly identifying any instances of downtime. This platform continuously assesses the status of websites, web applications, and online services, delivering immediate insights into their availability and performance metrics. With real-time alerts for any outages, sluggish response times, or disruptions, users can respond to incidents more quickly, thereby minimizing downtime. The features include tracking uptime, monitoring response times, generating historical performance reports, and allowing for customizable notification preferences. Teams can oversee multiple endpoints through a unified dashboard, thus maintaining a clear view of service health over time. Zunoy Uptime caters to a diverse range of users, from developers and DevOps teams to SaaS providers and digital agencies, making it essential for any organization that relies on consistently available online services. Additionally, the service's flexibility ensures that it can adapt to various operational needs, enhancing its value for all types of businesses.

Testing and monitoring your web services has never been simpler. With Assertible's automated quality assurance tools, you can ensure the reliability of your essential infrastructure by testing and monitoring web services throughout various deployments and environments. Assertible acts as a dependable first line of defense against web service failures, offering straightforward and effective assertions for your APIs and websites. By minimizing false positives in your automated quality assurance tests, you can trust that your APIs remain in good health. While keeping your tests current may seem daunting, Assertible streamlines this process by allowing you to automatically synchronize your API tests with the most recent updates to your specifications. As you modify responses, parameters, headers, and additional elements, updating your Assertible API tests becomes a hassle-free task that requires just a simple click to sync. Furthermore, Assertible seamlessly integrates with your existing tools, enabling functionalities like executing your web application tests upon code pushes to GitHub or sending alerts to Slack in case of any failures, thus facilitating a smoother workflow. By leveraging these features, teams can enhance their development efficiency while maintaining high-quality standards.

APIs serve a purpose beyond mere connectivity; they are essential for the integrity of your business, applications, and brand image. This emphasizes the importance of ensuring they are consistently operational and functioning optimally. Prevent situations where customers have to inform you of an API outage, and avoid negative feedback on app stores due to sluggish or inconsistent APIs. Conventional monitoring solutions were developed long before APIs became pivotal to contemporary software. In contrast, API Science is tailored specifically for the oversight of APIs. We have a firm grasp of REST, JSON, OAuth, and XML, among others. Our global API monitoring network provides insights into the real-world experiences of developers and applications interacting with your APIs. You can configure API monitors according to your specific tests, and we will assess your APIs from various locations worldwide, up to every minute. Should any issues arise, we will promptly notify you, enabling you to swiftly detect performance bottlenecks, outages, or errors, and facilitating a more efficient troubleshooting process. With our service, you can ensure that your APIs maintain high standards of reliability and performance, ultimately enhancing user satisfaction.

SigNoz serves as an open-source alternative to Datadog and New Relic, providing a comprehensive solution for all your observability requirements. This all-in-one platform encompasses APM, logs, metrics, exceptions, alerts, and customizable dashboards, all enhanced by an advanced query builder. With SigNoz, there's no need to juggle multiple tools for monitoring traces, metrics, and logs. It comes equipped with impressive pre-built charts and a robust query builder that allows you to explore your data in depth. By adopting an open-source standard, users can avoid vendor lock-in and enjoy greater flexibility. You can utilize OpenTelemetry's auto-instrumentation libraries, enabling you to begin with minimal to no coding changes. OpenTelemetry stands out as a comprehensive solution for all telemetry requirements, establishing a unified standard for telemetry signals that boosts productivity and ensures consistency among teams. Users can compose queries across all telemetry signals, perform aggregates, and implement filters and formulas to gain deeper insights from their information. SigNoz leverages ClickHouse, a high-performance open-source distributed columnar database, which ensures that data ingestion and aggregation processes are remarkably fast. This makes it an ideal choice for teams looking to enhance their observability practices without compromising on performance.

Testfully offers an extensive array of features, ranging from robust API client capabilities to sophisticated testing and monitoring functionalities. Users can take advantage of versatile cloud and offline storage options, facilitate effortless collaboration among teams, and enjoy straightforward migration, all within a single, comprehensive multi-platform tool. The platform simplifies the transition of data from Postman or Insomnia, allowing for seamless integration into Testfully. With a focus on flexibility and security, users can establish global, environment, and folder variables tailored to either the workspace or individual users. The tool also allows for the customization of authentication methods, parameters, headers, and body content, making it easy to create any HTTP request. Collaboration is made simple as you can invite team members, assign specific roles, and manage folder permissions effectively. Testfully supports major authorization schemes such as OAuth2, ensuring secure and efficient access management. Whether you are dealing with straightforward tasks or more intricate scenarios, Testfully streamlines the testing process without requiring any coding skills, thus making advanced API testing more approachable and user-friendly. Users can execute requests within a folder either simultaneously, sequentially, or in a random order with a single click, enhancing efficiency. Additionally, it allows for response validation and contract testing through a declarative format, further eliminating the need for coding and simplifying the overall testing experience. Overall, Testfully is designed to cater to both novice and experienced users, ensuring that everyone can leverage its capabilities effectively.

Eliminate delays, pinpoint inefficiencies, and troubleshoot problems effectively. Become a part of a swiftly growing network of global businesses that are realizing up to 20 times the value and return on investment by utilizing KloudMate, far exceeding other observability platforms. Effortlessly track essential metrics, relationships, and identify irregularities through alerts and tracking issues. Swiftly find critical 'break-points' in your application development process to address problems proactively. Examine service maps for each component within your application while revealing complex connections and dependencies. Monitor every request and operation to gain comprehensive insights into execution pathways and performance indicators. Regardless of whether you are operating in a multi-cloud, hybrid, or private environment, take advantage of consolidated Infrastructure monitoring features to assess metrics and extract valuable insights. Enhance your debugging accuracy and speed with a holistic view of your system, ensuring that you can detect and remedy issues more quickly. This approach allows your team to maintain high performance and reliability in your applications.

We keep a close eye on your websites, APIs, cron jobs, and other scheduled tasks. Your team receives instant notifications through various channels, including email, SMS, Slack, PagerDuty, and Incident.io. You don’t need to be a tech expert to get started, as our setup is straightforward and user-friendly. Enjoy peace of mind with monitoring that helps you sleep easier at night. Checks can be performed as frequently as every 30 seconds, allowing you to identify problems that could temporarily disrupt your website. Each check can be customized with specific HTTP methods, headers, and bodies according to your needs. OnlineOrNot ensures reliability by conducting each check at least twice before notifying you, with the possibility of additional checks if required. Furthermore, OnlineOrNot monitors your SSL certificates for any impending expirations or potential issues and promptly alerts you if something goes awry. You have the option to perform uptime checks from a single region or multiple locations simultaneously. Since your customers depend on your services, keep them informed with a dynamic status page that updates automatically. You can easily add your customers as subscribers to this status page and send regular updates about any incidents via email to keep everyone in the loop. This proactive approach not only enhances customer trust but also improves overall service reliability.

Cisco ThousandEyes is an innovative platform for network intelligence that equips organizations with profound insights into digital interactions across various environments, including the internet, cloud, and enterprise networks. Utilizing sophisticated monitoring and analytics capabilities, ThousandEyes enables businesses to identify, troubleshoot, and rectify performance challenges that affect essential applications, websites, and services. Its extensive array of tools delivers valuable information regarding network performance, application delivery, and user engagement, allowing organizations to maintain uninterrupted connectivity and enhance user experiences. This platform is widely embraced by Fortune 500 companies and SaaS providers alike, establishing itself as a reliable solution for navigating the intricacies of contemporary hybrid and multi-cloud landscapes. Additionally, ThousandEyes empowers IT teams by equipping them with the tools needed to proactively manage, optimize, and refine their digital infrastructures for improved operational efficiency.

Oack is a powerful external HTTP monitoring tool designed specifically for engineers seeking to analyze latency and outages rather than merely identify their occurrence. Every probe offers an extensive array of data, including: - A comprehensive 6-phase breakdown of HTTP timing (covering DNS, Connect, TLS, Send, Wait, and Receive) - Detailed TCP kernel telemetry, featuring metrics like RTT, retransmissions, congestion window, and RTO through getsockopt(TCP_INFO) on Linux systems - Automatic capture and visualization of the Server-Timing header - Enhanced Cloudflare CDN log information, including edge PoP data, cache status, and origin response times - Traceroute analysis that provides per-hop RTT, ASN, and geolocation insights - Performance percentiles tracked over various spans of 1 day, 7 days, 30 days, and 90 days - Optional packet capture (PCAP) capabilities for in-depth post-mortem analysis Additionally, Oack supports browser monitoring through Playwright, offering both Pageload mode—which includes Web Vitals, HAR waterfalls, and screenshots—and Test Suite mode that allows for the scheduling of existing .spec.ts files as monitors. Moreover, it incorporates built-in incident management features, which facilitate automatic incident creation, on-call scheduling with rotations, escalation protocols, war room setups, and the generation of post-mortem reports to ensure thorough follow-up on incidents.

exit1.dev provides real-time monitoring for the uptime of websites, APIs, and infrastructure through an interactive live dashboard. The results from probes are streamed directly to your browser via WebSockets from our regional servers, ensuring that the chart and raw probe data refresh instantly as each check concludes, detailing the timing for DNS resolution, connection establishment, TLS negotiation, and the first byte received—eliminating the need for manual refreshes or polling. The service conducts checks across a variety of protocols, including HTTP, TCP, UDP, ICMP, WebSocket, DNS, and heartbeat monitors, all from multiple geographic locations. Additionally, it monitors SSL certificate and domain expiration, validates response bodies based on status codes, JSONPath, and text, while providing alert options through email, SMS, Slack, Discord, Teams, or webhooks. exit1.dev also includes an MCP server, enabling AI assistants to directly create and query your monitors. Users benefit from public status pages, customizable status badges, and access to a REST API. With the free plan, you can utilize up to 10 monitors without needing to provide credit card information, making it an accessible option for those looking to maintain oversight of their digital assets. This comprehensive approach ensures that you have all the tools necessary for effective monitoring and management of your online presence.

AlertSite serves as a reliable 'Early Warning System' designed to keep an eye on your websites, web applications, and APIs from diverse global locations as well as within your private networks. You deserve peace of mind, free from the stress of distinguishing between genuine alerts and false positives. With AlertSite, you can oversee your UI and API layers for availability, performance, and functionality, all while avoiding the alert fatigue that often comes with other monitoring solutions. The process of establishing Web and API monitors on AlertSite is straightforward and user-friendly. You can effortlessly create new web monitors using DejaClick, a point-and-click web recorder, or set up API monitors in just a few clicks by entering an API Endpoint URL or utilizing an OpenAPI Specification file. Additionally, you have the option to repurpose existing test cases, such as Selenium Scripts or SoapUI tests, for creating new monitors. By using AlertSite, you can maintain clear visibility into your application's health without being misled by false alerts and inaccurate data. This comprehensive approach ensures that your monitoring experience is both effective and efficient.

An API Monitoring test using Runscope consists of one or multiple HTTP requests executed in a sequence to assess the availability, speed, and accuracy of an API. During each phase of the test, you can set up Assertions to check the response data and utilize Variables to retrieve information for later requests. A test is considered successful if all assertions are satisfied, whereas it will fail if any assertion does not hold true or if an error occurs, such as issues with the network connection. It’s crucial that your clients are not the ones informing you about service outages or malfunctions. Runscope integrates with your existing notification platforms like PagerDuty, Slack, HipChat, email, webhooks, and others. By actively monitoring your service performance, you can swiftly identify and troubleshoot API issues. Utilize the API Dashboard and daily API Performance Report to stay ahead of sporadic failures before they escalate into significant concerns. Ensure that your API calls' structure and content align with your expectations, as powerful and flexible assertions provide you with comprehensive control over the testing process. With these tools in hand, you can maintain a robust and reliable API experience for your users.

Independent, real-time monitoring of APIs tailored for developers, consumers, providers, and regulators is essential, as 70% of API issues are often overlooked by traditional tools and systems. This solution provides authentic, external calls from various global locations, ensuring continuous assurance regarding the security of your APIs. Users can effortlessly assess service performance and receive immediate alerts when issues arise, accompanied by insightful reports. Furthermore, it facilitates the swift resolution of third-party disputes while meeting regulatory requirements and enabling quick proof of compliance to relevant stakeholders. The platform offers valuable analysis and metrics, along with actionable service level agreements that come with straightforward reporting features. It supports customized monitoring for both REST and SOAP APIs and boasts cross-cloud integration capabilities. Adherence to API security standards, including JSON signing and full compliance with relevant regulations, is guaranteed. Moreover, it seamlessly integrates with popular DevOps and CI/CD tools through webhooks, providing a comprehensive solution for API coverage and assurance. This ensures that organizations can maintain robust API performance and security in an increasingly complex digital landscape.