Sites using OpenHolidays API
Open API providing public and school holiday data for European countries.
6 sites
5 found by StackScope, 1 via launch platforms
- StackScope Wider Web 3
- StackScope Discovery (Indie) 2
- Product Hunt 1
OpenHolidays API has been detected on 6 launches since first appearing in July 2026. Most recent detection: Holiday Rental Income Calculator | Estimate Annual Revenue, on August 21, 2026.
It's most commonly paired with HSTS, HTTP/3, and Google Search Console.
Share of new sites using OpenHolidays API
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
Data API leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | ▲2 |
LocalLogic
|
0.07% | 25.73% |
| #2 | ▼1 |
The Movie Database
|
0.02% | 6.17% |
| #3 | ▲5 |
Daum Postcode
|
0.01% | 4.52% |
| #4 | ▼1 |
ViaCEP
|
0.01% | 3.50% |
| #5 | ▼3 |
Frankfurter
|
0.01% | 3.49% |
| … | ||||
| #188 | ▼92 | OpenHolidays API Current page | <0.01% | 0.08% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Data API tool.Among August launches it ranked #188 in Data API, down from #96 in July. All 973 in Data API →
Often used with
| Tool | Sites |
|---|---|
| HSTS | 6 |
| HTTP/3 | 4 |
Google Search Console
|
3 |
Cloudflare DNS
|
3 |
Cloudflare
|
3 |
Tools most often detected on the same sites as OpenHolidays API.
Recent launches we can show
3 of the 6 sites using OpenHolidays API are product launches we list individually. The other 3 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
ToolVines
Productivity
NextStint — for EU long-haul drivers
The StackScope API serves all 6 sites using OpenHolidays API, filterable and exportable, from £15 a month.