Aare.guru API vs GrünstromIndex
Same instrument, two spec sheets — measured, not claimed.
Aare.guru API vs GrünstromIndex: common questions
Which is more reliable, Aare.guru API or GrünstromIndex?
On our scheduled checks, Aare.guru API leads on measured uptime — Aare.guru API at 100% versus GrünstromIndex at 73.5% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, Aare.guru API or GrünstromIndex?
Aare.guru API has the lower median latency in our checks — Aare.guru API responds in 1025 ms versus GrünstromIndex at 1072 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.
Do Aare.guru API and GrünstromIndex need an API key?
Neither needs a paid key — Aare.guru API is callable with no signup, and GrünstromIndex is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Aare.guru API and GrünstromIndex from the browser?
Yes — both Aare.guru API and GrünstromIndex send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are Aare.guru API and GrünstromIndex free for commercial use?
Aare.guru API has unclear commercial terms, and GrünstromIndex has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.