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FastDOL vs OpenMercantil

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

APIFastDOLHEALTHY85OpenMercantilHEALTHY90
Uptime · 30d
Uptime · 90d100%93.1%
Uptime · 30d100%98.3%
P50 · ms680116
P95 · ms17253973
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree — anonymous, no key
Rate limitUnpublished60 req/min, 200 req/day per IP (anonymous)
In directory since2026-07-052026-07-05
operationalpartialdownno data

FastDOL vs OpenMercantil: common questions

Which is more reliable, FastDOL or OpenMercantil?

On our scheduled checks, FastDOL leads on measured uptime — FastDOL at 100% versus OpenMercantil at 93.1% 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, FastDOL or OpenMercantil?

OpenMercantil has the lower median latency in our checks — FastDOL responds in 680 ms versus OpenMercantil at 116 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 FastDOL and OpenMercantil need an API key?

OpenMercantil needs no key, while FastDOL requires a free API key. If you want to start calling without signup, reach for OpenMercantil first.

Can I call FastDOL and OpenMercantil from the browser?

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

Are FastDOL and OpenMercantil free for commercial use?

FastDOL has unclear commercial terms, and OpenMercantil 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.