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Datamuse vs HOL Registry Broker

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

APIDatamuseHEALTHY94HOL Registry BrokerHEALTHY94
Uptime · 30d
Uptime · 90d92.2%99.02%
Uptime · 30d86.7%100%
P50 · ms180386
P95 · ms926913
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Datamuse vs HOL Registry Broker: common questions

Which is more reliable, Datamuse or HOL Registry Broker?

On our scheduled checks, HOL Registry Broker leads on measured uptime — Datamuse at 92.2% versus HOL Registry Broker at 99.02% 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, Datamuse or HOL Registry Broker?

Datamuse has the lower median latency in our checks — Datamuse responds in 180 ms versus HOL Registry Broker at 386 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 Datamuse and HOL Registry Broker need an API key?

Datamuse needs no key, while HOL Registry Broker requires a free API key. If you want to start calling without signup, reach for Datamuse first.

Can I call Datamuse and HOL Registry Broker from the browser?

Neither sends browser-friendly CORS headers reliably, so call Datamuse and HOL Registry Broker from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Datamuse and HOL Registry Broker free for commercial use?

Datamuse has unclear commercial terms, and HOL Registry Broker 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.