Freedom251 › API Monitoring Tools
Sysmos
What Sysmos is
Sysmos brings API health checks, Linux server monitoring, and a centralized dashboard together for teams that need to track services and infrastructure. Synthetic checks run API endpoints across global regions and report status, SSL details, latency, and timing across DNS, TCP, TLS handshake, server processing, and content transfer. Per-phase averages and maximums are available over 1-hour, 24-hour, and 7-day periods. For multi-step checks, the flow builder chains API steps, extracts variables, and applies assertions; flows can run on demand or on a schedule. A Linux agent for x86_64 and arm64 uses eBPF to collect syscall, network, CPU, and memory data. Sysmos states that the agent’s CPU overhead is under 2%. Alerts can go to Slack, Discord, PagerDuty, email, or HTTP endpoints through webhooks. Workspaces include admin, developer, and viewer roles, as well as API keys for CI/CD and infrastructure-as-code. The Free plan costs nothing; Team is $29 a month and Business is $99 a month. Sysmos lists API, Linux, and web platforms, and describes the service as designed for small teams.
Who it suits
Sysmos suits solo developers and personal projects on its Free plan, as well as small teams that need API checks, Linux server data, and shared monitoring. Teams that need scheduled API flows, alert routing, or role-based workspace access can use those built-in capabilities.
What it does well
- Checks APIs across multiple global regions.
- Breaks latency into five timing phases.
- API flows support variable extraction and assertions.
- Linux eBPF agent captures syscall and resource data.
- Alerts integrate with Slack, Discord, PagerDuty, email, and webhooks.
- Workspaces provide three roles and API keys.
What to know first
- Free plan is limited to 10 API monitors and five flows.
- Free plan checks one region at a 60-second minimum interval.
- Free plan log retention is seven days.
- Linux agent supports x86_64 and arm64.
Limits
The Free plan includes 10 API monitors, five flows, one region, a 60-second minimum interval, five team members, one organization, and seven-day log retention. Team costs $29 a month and includes 100 monitors, 50 flows, all 12 regions, a 30-second interval, unlimited members, five organizations, and 30-day retention.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | 10 API monitors · 5 flows · 1 region · 60s min interval · 5 team members · 1 organization · 7-day log retention | Free |
| Team | 100 monitors · 50 flows · all 12 regions · 30s interval · unlimited members · 5 orgs · 30-day retention · all integrations · server agent included | $29 a month |
| Business | Unlimited monitors and flows · 10s interval · custom regions · SSO · audit logs · SLA · 1-year retention · priority support | $99 a month |
As sysmos.org lists them, read 7 Oct 2026. The maker's own page has the final word.
Getting started
- Visit https://www.sysmos.org/.
- Choose the Free plan or a paid plan.
- Add an API endpoint for monitoring.
- Install the Linux agent with one curl command if you want server monitoring.
- Route alerts to a supported channel.
Verdict
Choose Sysmos if you want API health checks, Linux observability, and alert routing in one monitoring service. The Free plan is sized for solo use; teams needing more monitors, regions, faster intervals, or longer retention can consider Team or Business. Business is the listed plan with unlimited monitors and flows, SSO, audit logs, and one-year retention.
Questions
Is Sysmos free?
Yes. The Free plan costs nothing and includes 10 API monitors, five flows, one region, and seven-day log retention.
What does Sysmos cost?
Team costs $29 a month, and Business costs $99 a month. A 14-day trial is listed.
Which platforms does Sysmos support?
The listed platforms are API, Linux, and web. Its Linux agent supports x86_64 and arm64.
Which alert integrations are available?
Built-in channels include Slack, Discord, PagerDuty, and email. Generic webhooks can send alerts to HTTP endpoints.
Does Sysmos offer team access controls?
Workspaces support admin, developer, and viewer roles. API keys are available for CI/CD and infrastructure-as-code.
What are Sysmos’s data residency and SOC 2 details?
The homepage states that EU and US data residency are available and that SOC 2 is in progress.
Facts from Sysmos's own pages
- Alert integrations
- Built-in alert channels include Slack, Discord, PagerDuty, and email, with generic webhooks for HTTP endpoints. · sysmos.org, 7 Oct 2026
- API flows
- The flow builder chains API steps with variable extraction and per-step assertions, and flows can run on demand or on a schedule. · sysmos.org, 7 Oct 2026
- API monitoring
- It runs synthetic endpoint checks across global regions and reports latency, status, SSL, and timing breakdowns. · sysmos.org, 7 Oct 2026
- Integration details
- The integrations page says Slack uses OAuth and supports multiple workspaces, PagerDuty uses Events API v2, and webhooks support Mustache templating and retries. · sysmos.org, 7 Oct 2026
- Intended users
- Sysmos describes itself as designed for small teams and presents the Free plan for solo developers and personal projects. · sysmos.org, 7 Oct 2026
- Latency detail
- Checks break timing into DNS, TCP, TLS handshake, server processing, and content transfer, with per-phase averages and maxima over 1-hour, 24-hour, and 7-day periods. · sysmos.org, 7 Oct 2026
- Product
- Sysmos combines distributed API health checks, kernel-level server observability, and a centralized monitoring dashboard. · sysmos.org, 7 Oct 2026
- Security and residency
- The homepage states that SOC 2 is in progress and that EU and US data residency are available. · sysmos.org, 7 Oct 2026
- Server agent
- Sysmos offers an eBPF Linux agent for x86_64 and arm64 that captures syscall, network, CPU, and memory data; the maker states CPU overhead is under 2%. · sysmos.org, 7 Oct 2026
- Setup
- The maker says users can add an API endpoint, install the Linux agent with one curl command, and route alerts, with setup taking under five minutes. · sysmos.org, 7 Oct 2026
- Team access
- Workspaces support admin, developer, and viewer roles, and API keys for CI/CD and infrastructure-as-code. · sysmos.org, 7 Oct 2026
Where Sysmos stands on Freedom251
- API Monitoring Tools#17 of 27