Advice Slip vs Affirmations.dev

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

Uptime · 30d
Uptime · 90d62.7%100%
Uptime · 30d61.7%100%
P50 · ms747590
P95 · ms49601081
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Advice Slip vs Affirmations.dev: common questions

Which is more reliable, Advice Slip or Affirmations.dev?

On our scheduled checks, Affirmations.dev leads on measured uptime — Advice Slip at 62.7% versus Affirmations.dev at 100% 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, Advice Slip or Affirmations.dev?

Affirmations.dev has the lower median latency in our checks — Advice Slip responds in 747 ms versus Affirmations.dev at 590 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 Advice Slip and Affirmations.dev need an API key?

Neither needs a paid key — Advice Slip is callable with no signup, and Affirmations.dev is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Advice Slip and Affirmations.dev from the browser?

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

Are Advice Slip and Affirmations.dev free for commercial use?

Advice Slip has unclear commercial terms, and Affirmations.dev 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.