Datadog

Platform

Hosted monitoring for infrastructure metrics, logs, traces and user sessions

Price: Free tier, then paid
Access: API key

About

Observability platform that collects infrastructure metrics, logs, APM traces and real user sessions through its Agent, SDKs and HTTP APIs. Data stays on the regional site you pick (US, EU, UK, Japan, Australia); billing is per host and per GB, so costs grow with volume.

What you can do with it

Collect host, container and custom metrics and alert on them with monitors
Ingest and search application and infrastructure logs
Trace requests across services with APM and link them to logs

Get started

Create a Datadog account on the site (region) you need
Create an API key under Organization Settings

Example

# US1 site; other sites use their own host, e.g. api.datadoghq.eu
curl -X POST "https://api.datadoghq.com/api/v2/series" \
  -H "Content-Type: application/json" \
  -H "DD-API-KEY: $DD_API_KEY" \
  -d '{"series":[{"metric":"system.load.1","type":0,
       "points":[{"timestamp":'"$(date +%s)"',"value":0.7}],
       "resources":[{"name":"dummyhost","type":"host"}]}]}'

Details

Hosting: Hosted service
Available in: Worldwide
Official SDKs: Java, Python, Ruby, Go, JavaScript/TypeScript, Rust
MCP server: Remote