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ChartLyrics vs Rules of Acquisition

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

APIChartLyricsDEAD0Rules of AcquisitionNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSunknownyes
HTTPSnoyes
Card requirednono
Commercial useunclearunclear
Data licenseUnlicensed lyrics dataUnverified
Free tierWas: unlimitedFree — limits not published
Rate limit—Unpublished
In directory since2026-05-022026-07-05
operationalpartialdownno data

ChartLyrics vs Rules of Acquisition: common questions

Which is more reliable, ChartLyrics or Rules of Acquisition?

On our scheduled checks, Rules of Acquisition leads on measured uptime — ChartLyrics at —% versus Rules of Acquisition 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 ChartLyrics and Rules of Acquisition need an API key?

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

Can I call ChartLyrics and Rules of Acquisition from the browser?

Only Rules of Acquisition 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 ChartLyrics and Rules of Acquisition free for commercial use?

ChartLyrics has unclear commercial terms, and Rules of Acquisition 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.