Simkl vs ChartLyrics

Same instrument, two spec sheets — measured, not claimed.

Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms
P95 · ms
Authnonenone
CORSyesunknown
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseSimkl terms — user-contributed dataUnlicensed lyrics data
Free tierFree read routes; client_id for searchWas: unlimited
Rate limit1 req/s documented
In directory since2026-07-052026-05-02
operationalpartialdownno data

Simkl vs ChartLyrics: common questions

Which is more reliable, Simkl or ChartLyrics?

On our scheduled checks, ChartLyrics leads on measured uptime — Simkl at —% versus ChartLyrics at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Simkl and ChartLyrics need an API key?

Neither needs a paid key — Simkl is callable with no signup, and ChartLyrics is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Simkl and ChartLyrics from the browser?

Only Simkl is browser-friendly — it returns CORS headers over HTTPS. ChartLyrics needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Simkl and ChartLyrics free for commercial use?

Simkl has unclear commercial terms, and ChartLyrics 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.