Monitor Service

Manage HTTP, TCP, and DNS monitors. The Monitor Service provides 12 RPC methods for creating, updating, listing, triggering, deleting, and querying monitor status and metrics.

All examples assume you have created a client:

import { createOpenStatusClient } from "@openstatus/sdk-node";

const client = createOpenStatusClient({
  apiKey: process.env.OPENSTATUS_API_KEY,
});

HTTP Monitors

Create HTTP Monitor

import {
  createOpenStatusClient,
  HTTPMethod,
  NumberComparator,
  Periodicity,
  Region,
  StringComparator,
} from "@openstatus/sdk-node";

const client = createOpenStatusClient({
  apiKey: process.env.OPENSTATUS_API_KEY,
});

const { monitor } = await client.monitor.v1.MonitorService.createHTTPMonitor({
  monitor: {
    name: "My API",
    url: "https://api.example.com/health",
    periodicity: Periodicity.PERIODICITY_1M,
    method: HTTPMethod.HTTP_METHOD_GET,
    regions: [Region.FLY_AMS, Region.FLY_IAD, Region.FLY_SYD],
    active: true,
    timeout: BigInt(30000),
    retry: BigInt(3),
    followRedirects: true,
    degradedAt: BigInt(5000),
    headers: [
      { key: "Authorization", value: "Bearer my-token" },
    ],
    statusCodeAssertions: [
      { comparator: NumberComparator.EQUAL, target: BigInt(200) },
    ],
    bodyAssertions: [
      { comparator: StringComparator.CONTAINS, target: '"status":"ok"' },
    ],
    headerAssertions: [
      {
        key: "content-type",
        comparator: StringComparator.CONTAINS,
        target: "application/json",
      },
    ],
    description: "Health check for the production API",
    public: false,
    openTelemetry: {
      endpoint: "https://otel.example.com/v1/traces",
      headers: [{ key: "Authorization", value: "Bearer otel-token" }],
    },
  },
});

console.log(`Created monitor: ${monitor?.id}`);

Update HTTP Monitor

Updates are partial — only include the fields you want to change.

const { monitor } = await client.monitor.v1.MonitorService.updateHTTPMonitor({
  id: "mon_123",
  monitor: {
    name: "Updated API Monitor",
    active: false,
  },
});

HTTP Monitor Options

Option	Type	Required	Description
name	string	Yes	Monitor name (max 256 chars)
url	string	Yes	URL to monitor (max 2048 chars)
periodicity	Periodicity	Yes	Check interval
method	HTTPMethod	No	HTTP method (default: GET)
body	string	No	Request body
headers	Headers[]	No	Custom headers { key, value }[]
timeout	bigint	No	Timeout in ms (default: 45000, max: 120000)
retry	bigint	No	Retry attempts (default: 3, max: 10)
followRedirects	boolean	No	Follow redirects (default: true)
regions	Region[]	No	Regions for checks
active	boolean	No	Enable monitoring (default: false)
public	boolean	No	Public visibility (default: false)
degradedAt	bigint	No	Latency threshold (ms) for degraded status
description	string	No	Monitor description (max 1024 chars)
statusCodeAssertions	StatusCodeAssertion[]	No	Status code assertions
bodyAssertions	BodyAssertion[]	No	Body assertions
headerAssertions	HeaderAssertion[]	No	Header assertions
openTelemetry	OpenTelemetryConfig	No	OpenTelemetry export configuration

TCP Monitors

Create TCP Monitor

import {
  createOpenStatusClient,
  Periodicity,
  Region,
} from "@openstatus/sdk-node";

const client = createOpenStatusClient({
  apiKey: process.env.OPENSTATUS_API_KEY,
});

const { monitor } = await client.monitor.v1.MonitorService.createTCPMonitor({
  monitor: {
    name: "Database",
    uri: "db.example.com:5432",
    periodicity: Periodicity.PERIODICITY_5M,
    regions: [Region.FLY_AMS, Region.FLY_IAD],
    active: true,
  },
});

Update TCP Monitor

const { monitor } = await client.monitor.v1.MonitorService.updateTCPMonitor({
  id: "mon_123",
  monitor: {
    name: "Updated Database Monitor",
  },
});

TCP Monitor Options

Option	Type	Required	Description
name	string	Yes	Monitor name (max 256 chars)
uri	string	Yes	host:port to monitor (max 2048 chars)
periodicity	Periodicity	Yes	Check interval
timeout	bigint	No	Timeout in ms (default: 45000, max: 120000)
retry	bigint	No	Retry attempts (default: 3, max: 10)
regions	Region[]	No	Regions for checks
active	boolean	No	Enable monitoring (default: false)
public	boolean	No	Public visibility (default: false)
degradedAt	bigint	No	Latency threshold (ms) for degraded status
description	string	No	Monitor description (max 1024 chars)
openTelemetry	OpenTelemetryConfig	No	OpenTelemetry export configuration

DNS Monitors

Create DNS Monitor

import {
  createOpenStatusClient,
  Periodicity,
  RecordComparator,
  Region,
} from "@openstatus/sdk-node";

const client = createOpenStatusClient({
  apiKey: process.env.OPENSTATUS_API_KEY,
});

const { monitor } = await client.monitor.v1.MonitorService.createDNSMonitor({
  monitor: {
    name: "DNS Check",
    uri: "example.com",
    periodicity: Periodicity.PERIODICITY_10M,
    regions: [Region.FLY_AMS],
    active: true,
    recordAssertions: [
      {
        record: "A",
        comparator: RecordComparator.EQUAL,
        target: "93.184.216.34",
      },
      {
        record: "CNAME",
        comparator: RecordComparator.CONTAINS,
        target: "cdn",
      },
    ],
  },
});

Update DNS Monitor

const { monitor } = await client.monitor.v1.MonitorService.updateDNSMonitor({
  id: "mon_123",
  monitor: {
    name: "Updated DNS Check",
  },
});

DNS Monitor Options

Option	Type	Required	Description
name	string	Yes	Monitor name (max 256 chars)
uri	string	Yes	Domain to resolve (max 2048 chars)
periodicity	Periodicity	Yes	Check interval
timeout	bigint	No	Timeout in ms (default: 45000, max: 120000)
retry	bigint	No	Retry attempts (default: 3, max: 10)
regions	Region[]	No	Regions for checks
active	boolean	No	Enable monitoring (default: false)
public	boolean	No	Public visibility (default: false)
degradedAt	bigint	No	Latency threshold (ms) for degraded status
description	string	No	Monitor description (max 1024 chars)
recordAssertions	RecordAssertion[]	No	DNS record assertions
openTelemetry	OpenTelemetryConfig	No	OpenTelemetry export configuration

List Monitors

List all monitors with offset-based pagination. Returns monitors grouped by type.

const { httpMonitors, tcpMonitors, dnsMonitors, totalSize } =
  await client.monitor.v1.MonitorService.listMonitors({
    limit: 10,
    offset: 0,
  });

console.log(`Total: ${totalSize}`);
console.log(`HTTP: ${httpMonitors.length}`);
console.log(`TCP: ${tcpMonitors.length}`);
console.log(`DNS: ${dnsMonitors.length}`);

Pagination parameters:

Parameter	Type	Description
limit	number (optional)	Max results to return (1–100, default 50)
offset	number (optional)	Number of results to skip (default 0)

Get Monitor

Get a single monitor by ID. The response uses a MonitorConfig oneof type that contains one of HTTP, TCP, or DNS configuration.

const { monitor } = await client.monitor.v1.MonitorService.getMonitor({
  id: "mon_123",
});

if (monitor?.config.case === "http") {
  console.log(`HTTP Monitor: ${monitor.config.value.name} — ${monitor.config.value.url}`);
} else if (monitor?.config.case === "tcp") {
  console.log(`TCP Monitor: ${monitor.config.value.name} — ${monitor.config.value.uri}`);
} else if (monitor?.config.case === "dns") {
  console.log(`DNS Monitor: ${monitor.config.value.name} — ${monitor.config.value.uri}`);
}

Trigger Monitor

Trigger an immediate check for a monitor.

const { success } = await client.monitor.v1.MonitorService.triggerMonitor({
  id: "mon_123",
});

console.log(`Trigger successful: ${success}`);

Delete Monitor

const { success } = await client.monitor.v1.MonitorService.deleteMonitor({
  id: "mon_123",
});

Get Monitor Status

Get the current status of a monitor across all configured regions.

import {
  createOpenStatusClient,
  MonitorStatus,
  Region,
} from "@openstatus/sdk-node";

const client = createOpenStatusClient({
  apiKey: process.env.OPENSTATUS_API_KEY,
});

const { id, regions } = await client.monitor.v1.MonitorService.getMonitorStatus(
  { id: "mon_123" },
);

for (const { region, status } of regions) {
  console.log(`${Region[region]}: ${MonitorStatus[status]}`);
}

Get Monitor Summary

Get aggregated metrics and latency percentiles for a monitor over a time range.

import { createOpenStatusClient, TimeRange } from "@openstatus/sdk-node";

const client = createOpenStatusClient({
  apiKey: process.env.OPENSTATUS_API_KEY,
});

const summary = await client.monitor.v1.MonitorService.getMonitorSummary({
  id: "mon_123",
  timeRange: TimeRange.TIME_RANGE_7D,
  regions: [],
});

console.log(`Last ping: ${summary.lastPingAt}`);
console.log(`Successful: ${summary.totalSuccessful}`);
console.log(`Degraded: ${summary.totalDegraded}`);
console.log(`Failed: ${summary.totalFailed}`);
console.log(`P50: ${summary.p50}ms`);
console.log(`P75: ${summary.p75}ms`);
console.log(`P90: ${summary.p90}ms`);
console.log(`P95: ${summary.p95}ms`);
console.log(`P99: ${summary.p99}ms`);

The latency fields (p50, p75, p90, p95, p99) and count fields (totalSuccessful, totalDegraded, totalFailed) are bigint values. The regions parameter is optional — pass an empty array to get metrics across all regions.