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ClickSend REST API v3 vs Parkleitsystem API

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

APIClickSend REST API v3HEALTHY96Parkleitsystem APIHEALTHY86
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms3241097
P95 · ms10354508
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limit6000 req/window · 5999 remaining · resets 1Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ClickSend REST API v3 vs Parkleitsystem API: common questions

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

Both are neck-and-neck — ClickSend REST API v3 and Parkleitsystem API 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 Parkleitsystem API?

ClickSend REST API v3 has the lower median latency in our checks — ClickSend REST API v3 responds in 324 ms versus Parkleitsystem API at 1097 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 Parkleitsystem API need an API key?

Parkleitsystem API needs no key, while ClickSend REST API v3 requires a free API key. If you want to start calling without signup, reach for Parkleitsystem API first.

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

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

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

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