One API on new websites

1. One API appeared on about 180 new sites in the last 30 days.^[1]
2. Nine in ten new One API sites also use Tailwind CSS.
3. It is unusually common on .ai domains: 18% of the domains running it, against 2.7% of domains across new sites.

The line is the 7-day average share of new sites that use One API, since 10 September.

#	Movement	Tool	Share of all sites	Share of category	Bar
1	▼1	Anthropic	0.1%	25.8%
2	–	Abacus.AI	0.1%	21.6%
3	▲1	OpenAI API	0.1%	20.2%
4	–	Google Gemini API	<0.1%	10.2%
5	–	One API	<0.1%	5.7%

All-time shares across the new sites we track: of all of them, and of the sites using any AI API tool. All 203 in AI API

Tool	Sites with both	vs all new sites	Bar
Rspack	607	3035x
Zod	559	58x
TanStack Router	559	14x
Lucide Icons	788	5.4x
nginx	407	4.7x

Tools that turn up far more often on One API sites than on new sites in general, and how many times as common each one is there.

518 of the 901 sites using One API are product launches we list individually. The other 383 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.

Site	Found	Also detected
KEIAPI 可以API - GPT、Claude、Gemini API 中转站 | AI 编程接入 kei-code.com · AI	Oct 19
API GOGO apigogo.xyz · Developer Tools	Oct 19
Untitled site swaychip-ai.com · AI · China	Oct 19
Yhshu API cixu.ai · AI	Oct 19
木森 aihuisen.com · Developer Tools · China	Oct 19
摆渡人 yinshuhub.com · Developer Tools	Oct 19
ALRO alroai.com · AI · China	Oct 19
Untitled site toksoon.com · AI	Oct 19
ÆTHER airp-aether.com	Oct 18
OneAPI Now oneapinow.com · Developer Tools	Oct 18
深空 API · 统一模型网关 xkrelay.com · AI	Oct 18
泛思API y-api.com · Developer Tools · China	Oct 18

Showing the most recent 12 of 518.

Watches, exports and the API give you all 901 sites using One API, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.
2. Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. Too few sites state their country plainly for the usual count, so this one also counts single signals: a country domain ending, a phone number (for North America, its area code), a location the site declares in its own page metadata, or a country-specific vendor stack and the page language where they agree and nothing contradicts them. Read these as likely rather than certain.
3. Green hosting is the share whose web host The Green Web Foundation lists as running on green energy, among sites checked since 1 April 2026, against the same share for every new site we checked over that time. Data from The Green Web Foundation.