The Best API Monitoring Tools for REST, SOAP, GraphQL & WebSocket
Dotcom-Monitor is synthetic API monitoring software that checks your endpoints every minute from 30+ global locations — validating uptime, latency, and response payloads, and firing instant API outage alerts the moment something breaks.
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- First alerts in under 60 seconds
- 24×7 expert support
Trusted by 10,000+ organizations worldwide
API monitoring software built for teams that can't afford a silent outage
An HTTP 200 doesn't mean your API works. Dotcom-Monitor goes beyond status checks — running synthetic API monitoring that validates payloads, response times, and full multi-step transactions across REST, SOAP, GraphQL, and WebSocket so you catch failures before customers do.
1-minute synthetic checks, 30+ locations
Run synthetic API monitoring from 30+ global locations at 1-minute intervals. API uptime monitoring and API latency monitoring catch regional slowdowns and availability gaps that single-location tools miss.
Response & payload validation
API response validation monitoring with JSONPath (REST) and XPath (SOAP) assertions. API payload monitoring verifies the body contains the right fields and values — not just a 200 status code.
Instant API outage alerts
Real-time API error monitoring with instant outage alerts and API down detection via email, SMS, Slack, PagerDuty, Microsoft Teams, OpsGenie, and webhook — typically within 60 seconds of a breach.
All the API monitoring tools you need — in one platform
Most basic API status monitoring stops at a ping and an HTTP code. Dotcom-Monitor is a complete API monitoring solution combining uptime, performance, validation, multi-step transactions, and SLA reporting in a single dashboard.
| Capability | Basic API status checker | Dotcom-Monitor |
|---|---|---|
| HTTP status & uptime checksConfirm an endpoint responds | ✓ | ✓ |
| Global monitoring locationsCatch regional latency and routing issues | 1–3 | 30+ |
| Check frequencyFaster checks = faster API down detection | 5 min | Every 1 minute |
| Response & payload validationJSONPath / XPath assertions on the body | — | ✓ |
| Multi-step API transaction monitoringChain auth → query → submit → confirm | — | ✓ |
| Protocols: REST, SOAP/WSDL, GraphQL, WebSocket, gRPCOne platform, every protocol | REST only | ✓ |
| Authentication: OAuth 2.0, JWT, mTLS, AWS SigV4Match production access patterns | — | ✓ |
| Performance metrics: P95/P99, TTFB, latencyAPI performance & response time monitoring | Basic | Full |
| API SLA monitoring & uptime reportingDocumented evidence for SLA defense | — | ✓ |
| Outage alerts: Slack, PagerDuty, Teams, SMS, webhookInstant API outage alert routing | Email only | 20+ integrations |
| Internal & third-party API monitoringPrivate Agents behind your firewall | — | ✓ |
REST, SOAP, GraphQL & WebSocket API monitoring
From modern GraphQL queries to legacy SOAP services, Dotcom-Monitor monitors the APIs your stack actually runs — with the right validation method for each.
REST API monitoring tools
Full support for GET, POST, PUT, PATCH, and DELETE with JSONPath response validation. The REST API monitoring tool teams reach for to assert on status codes, headers, TTFB, and payload content.
SOAP & WSDL monitoring
Import WSDL definitions for WSDL monitoring with XPath assertions and SOAP 1.1/1.2 support, including WS-Security configurations for legacy enterprise web services.
GraphQL API monitoring
GraphQL API monitoring for queries and mutations — validate the response data structure and field values, not just that the endpoint returned a 200.
WebSocket uptime monitoring
WebSocket uptime monitoring keeps real-time connections honest — confirm the handshake succeeds and messages flow for chat, streaming, and live data feeds.
OAuth API monitoring
OAuth API monitoring with OAuth 2.0 Client Credentials and Authorization Code grants — plus API Key, Basic Auth, Bearer Token (including JWTs), NTLM, Kerberos, Client Certificate (mTLS), AWS Signature v4, and OTP / TOTP for two-factor-protected flows.
Multi-step API monitoring
Beyond single-endpoint API call monitoring, multi step API monitoring chains sequential calls — authenticate, query, submit, confirm — passing tokens between steps with per-step assertions to catch transaction-level failures.
Import your tests. Monitor real, authenticated workflows.
Turn the API tests your team already maintains into 24/7 monitors — and validate the multi-step, authenticated sequences your users and integrations actually depend on.
Postman & Insomnia import
Import Postman v2.0/v2.1 and Insomnia v4 collections directly — preserving environment variables, pre-request scripts, and test assertions. Turn the API tests your team already maintains into 24/7 production monitors in under 5 minutes.
Multi-step API sequences
Chain sequential API calls into a single monitor — authenticate, query, submit, confirm — passing tokens, session IDs, and order numbers between steps, with assertions on every step to catch transaction-level failures a single check would miss.
Every auth method, including OTP
OAuth 2.0, Bearer / JWT, API Key, Basic, mTLS, AWS SigV4, and NTLM / Kerberos — plus OTP and TOTP two-factor flows. Store the TOTP secret in an encrypted vault and the monitoring agent generates and injects the code at runtime, so 2FA-protected endpoints stay monitored with no manual steps.
API performance monitoring tools with SLA-grade reporting
Track the metrics that matter and prove you hit your numbers — latency, response time, availability, and error rates — all backed by a 99.99% uptime SLA on our own platform.
Latency & response time
API response time monitoring with P95/P99 percentiles, Time to First Byte (TTFB), and DNS resolution time — so API latency monitoring shows you the real distribution, not just an average.
API SLA monitoring
API SLA monitoring tracks availability percentage and error rates by HTTP status code, giving you documented uptime evidence to defend SLA adherence and satisfy audits.
Third-party API monitoring
Third party API monitoring for the dependencies you don't control — payment gateways, identity providers, and CRMs — so you can isolate whether an issue is yours or a vendor's.
How synthetic API monitoring works — in 4 steps
From a Postman import to live API endpoint monitoring with global synthetic checks — typically under 5 minutes.
Define endpoints & assertions
Configure REST or SOAP endpoints, JSONPath/XPath validations, and auth (OAuth 2.0, API Key, Bearer Token) — or import a Postman or Insomnia collection.
Schedule global checks
Run synthetic API monitoring at 1-, 3-, 5-, or 15-minute intervals from 30+ locations across North America, Europe, Asia-Pacific, and South America.
Track uptime & performance
API availability monitoring with availability %, P95/P99 response times, TTFB, and error rates by status code across every monitored endpoint.
Get instant alerts
API outage alerts via email, SMS, Slack, PagerDuty, or Microsoft Teams within seconds of a status, latency, or payload validation failure.
API outage alert channels
The API observability tool that tests from the outside in
Logs and APM traces tell you what happened inside your code. As an external API observability tool, Dotcom-Monitor tests your APIs the way customers and partners consume them — catching DNS failures, TLS errors, CDN misroutes, and network timeouts that internal tooling never sees.
| Question | Logging & tracing | Synthetic API monitoring |
|---|---|---|
| PerspectiveWhere the check runs from | Inside out (your servers) | Outside in (your customers) |
| Coverage during zero trafficDetect issues at 3am | Only when users hit the API | 24/7 from 30+ locations |
| Network-level failuresDNS, TLS, CDN, routing | — | ✓ |
| Proactive vs reactiveCatch it before customers do | After users are affected | Before users notice |
The trusted API monitoring service since 1998
"I have been thoroughly impressed with the level of detail and comprehensiveness of the reports. The support team has exceeded my expectations — consistently demonstrating unwavering patience and providing detailed, insightful answers."
Shirin R.Software Test Engineer · Computer Software Capterra review · 2023"One of Dotcom's best features is the push/pull API capabilities that provide us with network performance data. Dotcom-Monitor allows us to monitor multiple services within one interface and platform. It's allowed us to operate more efficiently."
Gregory S.Manager · Broadcast Media Capterra review · 2020"I'm a network analyst and use Dotcom tools inside the ISP I work at. It's a really good and reliable tool for monitoring things along the network — I use it to diagnose server latency and DNS resolve time."
Leonardo J.Network Infrastructure Analyst · Internet Capterra review · 2022Simple pricing for API monitoring
Every plan includes REST API monitoring, synthetic checks, multi-step transactions, and uptime reporting. Start free or unlock everything with a 30-day trial — no credit card.
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