# up4 — uptime monitoring

> up4 can check websites, APIs and scheduled jobs as often as every 10 seconds; each execution is metered or drawn from a plan budget. EU-hosted. Usage-priced (one €9-per-million rate for every check type) with flat Team/Agency plans. Full REST API at https://app.upfour.io/v1 (Bearer API keys, pls_test_ sandbox keys available).

## Guide

- [Docs overview](https://upfour.io/docs): Concepts and starting points
- [Getting started](https://upfour.io/docs/getting-started): Account, first monitor, alerts, status page, API key
- [Monitors](https://upfour.io/docs/monitors): HTTP/ping/TCP/DNS checks, intervals, keyword checks, degraded state, maintenance windows
- [Alerting & on-call](https://upfour.io/docs/alerting): Channels, alert plans, on-call rotations, confirmation rules
- [Scheduled jobs](https://upfour.io/docs/heartbeats): Heartbeat monitoring for cron jobs and backups
- [Status pages](https://upfour.io/docs/status-pages): Automatic component states, updates, subscribers, translations, hosted public URLs
- [Incidents & playbooks](https://upfour.io/docs/incidents): Incident lifecycle, severities, comments, shared playbook progress
- [Agency mode](https://upfour.io/docs/agency): Client partitions, share links, white-label reports, templates
- [Billing](https://upfour.io/docs/billing): The meter, wallet, monthly minimum, flat plans, runway warnings, grace mode

## API

- [API contract](https://upfour.io/docs/api): Auth, envelope, errors, pagination, idempotency, versioning, rate limits
- [API quickstart](https://upfour.io/docs/api/quickstart): Key to running monitor in five curl commands
- [Sandbox & test keys](https://upfour.io/docs/api/sandbox): pls_test_ keys against a sandbox organization
- [Webhooks](https://upfour.io/docs/api/webhooks): Signed outbound webhooks with verification snippets
- [OpenAPI 3.1 spec (JSON)](https://upfour.io/api/openapi.json): the full machine-readable contract

## API reference

- [Monitors](https://upfour.io/docs/api/monitors): The heart of the API: create, list, pause, resume and delete the things we check every ten seconds.
- [Monitor groups](https://upfour.io/docs/api/monitor-groups): Folders for monitors — group fleets per project or per customer.
- [Scheduled jobs (heartbeats)](https://upfour.io/docs/api/heartbeats): Cron jobs and backups that must call in before a deadline. Silence becomes an incident.
- [Scheduled job groups](https://upfour.io/docs/api/heartbeat-groups): Folders for scheduled jobs.
- [Resource metadata](https://upfour.io/docs/api/metadata): Free-form key/value metadata on monitors and scheduled jobs — owner, playbook link, cost center.
- [Incidents](https://upfour.io/docs/api/incidents): Open, acknowledge, comment, escalate, resolve. Everything the incident timeline shows, writable.
- [Severities](https://upfour.io/docs/api/severities): Your incident severity ladder (SEV1…), fully customizable.
- [Severity groups](https://upfour.io/docs/api/severity-groups): Group severities into reusable sets.
- [Alert channels](https://upfour.io/docs/api/notification-channels): Where alerts go: email, Slack, Telegram, PagerDuty and friends.
- [Alert plans (escalation policies)](https://upfour.io/docs/api/escalation-policies): Who is told, in what order, after how long.
- [On-call rotations](https://upfour.io/docs/api/oncall-schedules): Rotations, overrides, and "who is on call right now".
- [Playbooks (runbooks)](https://upfour.io/docs/api/runbooks): The steps you take when something breaks, attached to monitors, with shared progress.
- [Status pages](https://upfour.io/docs/api/status-pages): Public and client-facing uptime pages: structure, updates, subscribers, translations.
- [Reports](https://upfour.io/docs/api/reports): Availability and SLA reporting: summaries, trends, exports, schedules, share links.
- [SLA policies](https://upfour.io/docs/api/sla-policies): Targets and business-hours masks that reports measure against.
- [Share links](https://upfour.io/docs/api/share): Read-only client views — no accounts, no seats.
- [Organization](https://upfour.io/docs/api/organization): Company-level settings.
- [Teams](https://upfour.io/docs/api/teams): Teams and membership.
- [Invites](https://upfour.io/docs/api/invites): Invite colleagues — seats are unlimited everywhere.
- [Clients (agency mode)](https://upfour.io/docs/api/clients): The agency partition: clients, client teams, share links, archive/unarchive.
- [Client templates](https://upfour.io/docs/api/client-templates): Materialize monitors, pages and alert plans for a new client in one step.
- [Token introspection](https://upfour.io/docs/api/me): Who am I? What can this key do? The first call to make.
- [Webhook subscriptions](https://upfour.io/docs/api/webhook-subscriptions): Outbound, signed webhooks — subscribe, test, inspect deliveries, redeliver.

## Recipes

- [Batch-import a fleet](https://upfour.io/docs/recipes/batch-import): Create many monitors from a URL list
- [Deploy hooks](https://upfour.io/docs/recipes/deploy-hooks): Pause/resume monitors from CI
- [Webhook consumer](https://upfour.io/docs/recipes/webhook-consumer): Production-shaped receiver with signature verification
- [Backup heartbeat](https://upfour.io/docs/recipes/backup-heartbeat): Monitor a nightly backup via crontab
- [Monitors as code](https://upfour.io/docs/recipes/monitor-as-code): Sync a JSON fleet file idempotently from CI

## Optional

- [Pricing](https://upfour.io/pricing): the meter, flat plans and the full FAQ
- [Terms](https://upfour.io/terms), [Privacy](https://upfour.io/privacy), [DPA](https://upfour.io/legal/avv)