18.3
Monitors websites and APIs from Android, iOS, Linux, Windows and the web.
Free planAndroidiOSWeb
Best API Monitoring Tools in 2026
Dotcom-Monitor leads this chart of 27 (8.3/10, free plan). Loadster Synthetic Monitoring is next (7.8/10, free plan), and UptimeRobot is the next highest-placed with a free plan (7.8/10). API monitoring tools check whether APIs respond as expected and can help teams spot problems. The choice depends on what you need to check and where you need the tool to run. Compare free plans and paid starting prices, check frequency, response assertions, multi-region checks, private locations, monitor limits and incident workflows. If you need phone access, verify Android support directly; the platform facts here…
27.8
Loadster Synthetic Monitoring runs scheduled scripted checks against websites, web apps, and APIs from outside your infrastructure.
Free planWebAPIExtension
37.8
Track up to 10 targets with one-minute checks in Android and iOS apps.
Free planAndroidiOS
- 4
Tallwatch
Tallwatch monitors websites and APIs from multiple regions, opening an incident when at least two regions report the same failure during a check round.
Free planWebAPILinuxmacOS7.7From $14.99 a month - 5
Postman
API development tools with GraphQL support are available for Linux, macOS, Windows and web.
Free planWebExtensionLinuxmacOS7.6From $9 a month - 6
Sentinel
Checks uptime, SSL, DNS, domains, JSON/API responses and more from 15 global regions.
Free planWebAPIExtensionmacOS7.5From $14 a month - 7
Site24x7 API Monitoring
Site24x7 API Monitoring checks API interactions to identify issues that can affect reliability, performance and user experience.
Free planAndroidiOSWebAPI7.4From $109 a month - 8
7.4From $42 a month - 9
Watchlog
Brings infrastructure metrics, distributed traces, uptime checks, synthetic journeys and alerting together.
Free planWebAPILinuxSelf-hosted7.2From $299 a month - 10
APIContext
Monitors REST, GraphQL, browser journeys, MCP servers, AI workflows and services from 125+ locations.
Free planWebLinuxmacOSWindows7.1From $29 a month - 11
7.1From €15 a month - 12
Runscope
Runscope monitors APIs with sequential HTTP tests that can run in the cloud or behind a firewall.
WebAPILinuxmacOS7.1From $79 a month - 13
Assertible
Tests and monitors APIs, websites and HTTP services with assertions and specification imports.
Free planWebAPI6.9From $25 a month - 14
Checkly
Offers URL, TCP, DNS, ICMP, SSL, gRPC and browser checks for APIs and user interfaces.
Free planWebAPILinux6.9From $24 a month - 15
6.9From $49 a year - 16
ObserveOne API Monitoring
ObserveOne API Monitoring runs saved HTTP requests on demand or on a schedule and checks them against assertions for status codes, response times,…
Free planWebAPIExtensionSelf-hosted6.7From $6 a month - 176.7From $97 a month
- 18
Signalog
Signalog brings uptime monitoring, on-call paging, incident handling, status pages, and postmortems into one incident-response workflow.
Free planWebAPI6.6From $19 a month - 19
Uptara
Uptara is an API reliability and developer infrastructure product from Vamix for developers, DevOps engineers, and SREs responsible for APIs and…
Free planWebAPI6.6From $15 a month - 20
CyberPing
Measures API performance at over 75 global edge sites, with latency checks every 100 milliseconds.
Free planWebAPISelf-hosted6.5From $49 a month - 21
Sematext Synthetics
Sematext Synthetics checks API and web performance, including scripted user actions, from locations worldwide.
WebAPILinuxSelf-hosted6.5$2 usage-based - 22
Status Inspector
Monitors websites, APIs and infrastructure with JSON assertions and multi-region consensus.
Free planWebAPI6.5From €79 a month - 23
Sysmos
Runs regional API checks with timing breakdowns and scheduled or on-demand API flows.
Free planWebAPILinux6.5From $29 a month - 24
pingdan
Checks HTTP responses on a schedule and validates codes, response times, headers, bodies and JSON paths.
Free planWeb5.9Free plan - 25
5.8
Choosing well
Can I start with a free plan?
Check whether the tool has a free plan, a free trial or a paid entry point; these are different ways to evaluate cost.
For example, Site24x7 API Monitoring lists a free plan, paid plans from $9 per month billed annually and a 30-day trial. Watchlog lists a free plan, paid plans from $4.99 per month and a 30-day trial.
How often does it check my API?
Compare check frequency before choosing, because the interval determines how often the tool checks for a response.
Also look at response assertions to see whether the checks can evaluate the responses you care about.
Can it check from the locations I need?
Choose based on whether you need multi-region checks, private locations or both.
These options affect where checks run; confirm the available locations and setup details with the tool.
Which platforms does it need to run on?
Choose a tool that supports the platforms you need, and verify Android availability if you want to use it from a Xiaomi, Redmi or POCO phone or tablet.
The platform comparison covers web, API, Linux, Windows, macOS and self-hosted options, but does not specify Android support.
Does it fit my incident workflow?
Check the incident workflow options and monitor limit against your needs before committing.
If you need to read or change the code, check the tool's licence; the list does not identify an open-source option.
Questions people ask
Do API monitoring tools have Android apps?
The platform facts here do not specify Android support. Check the tool's current platform details if you need an app on a Xiaomi, Redmi or POCO device.
Which API monitoring tools have a free plan?
Free-plan availability is included in the comparison. Check an individual tool's current pricing page for plan limits and terms.
What should I compare in an API monitoring tool?
Compare check frequency, response assertions, multi-region checks, private locations, monitor limits and incident workflows, along with pricing and platform support.
Can API monitors run from private locations?
Private locations are one of the comparison points. Confirm availability and setup details with the tool you are considering.
What does open source mean for API monitoring tools?
If you need to inspect or change code, check the licence. The list does not identify an open-source option.