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ClickSend REST API v3 vs What3Words

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

APIClickSend REST API v3HEALTHY96What3WordsHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms324391
P95 · ms10351181
AuthapiKeyapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — key may be required
Rate limit6000 req/window · 5999 remaining · resets 1Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ClickSend REST API v3 vs What3Words: common questions

Which is more reliable, ClickSend REST API v3 or What3Words?

Both are neck-and-neck — ClickSend REST API v3 and What3Words each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, ClickSend REST API v3 or What3Words?

ClickSend REST API v3 has the lower median latency in our checks — ClickSend REST API v3 responds in 324 ms versus What3Words at 391 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 ClickSend REST API v3 and What3Words need an API key?

Both ask you to authenticate — ClickSend REST API v3 uses an API key and What3Words uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call ClickSend REST API v3 and What3Words from the browser?

Only ClickSend REST API v3 is browser-friendly — it returns CORS headers over HTTPS. What3Words needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are ClickSend REST API v3 and What3Words free for commercial use?

ClickSend REST API v3 has unclear commercial terms, and What3Words 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.