How can I query Prometheus metrics via Grafana's HTTP API using cURL?

Below is an example of a curl command you can use. In this example, we assume that the Prometheus datasource in Grafana has an id of 1, your Grafana instance is running on localhost at port 3000, and you want to query the metric "up":

BASHCopied
curl -X GET "http://localhost:3000/api/datasources/proxy/1/api/v1/query?query=up" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Accept: application/json"

Details

• Replace YOUR_API_KEY with a valid Grafana API key.
• Modify the datasource id (1 in the URL) if your Prometheus datasource has a different id.
• Change the query parameter (up in this example) to the Prometheus query you desire.
• Adjust the URL (localhost:3000) if your Grafana instance is hosted elsewhere.

This command sends the query to Grafana which internally proxies the request to the Prometheus API.