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MediaCaption API vs Sirv

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

APIMediaCaption APIDOCS OK100SirvDYING37
Uptime · 30d
Uptime · 90d100%0.0%
Uptime · 30d100%0.0%
P50 · ms1062—
P95 · ms1062—
AuthapiKeyapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseUnverified
Free tier10 credits when you sign upFree tier — API key required
Rate limit60 req/minUnpublished
In directory since2026-07-182026-07-05
operationalpartialdownno data

MediaCaption API vs Sirv: common questions

Which is more reliable, MediaCaption API or Sirv?

On our scheduled checks, MediaCaption API leads on measured uptime — MediaCaption API at 100% versus Sirv at 0.0% 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 MediaCaption API and Sirv need an API key?

Both ask you to authenticate — MediaCaption API uses an API key and Sirv 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 MediaCaption API and Sirv from the browser?

Yes — both MediaCaption API and Sirv send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are MediaCaption API and Sirv free for commercial use?

MediaCaption API allows commercial use on its free tier, and Sirv 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.