Crypto Rates Widget

An embeddable crypto price ticker — live price + 24h change, auto-refreshing — backed by a small Go caching proxy over CoinGecko's free API.

Live demo

The widget below is rendered by the same widget.js you would embed:

Embed it

Drop one <script> tag onto any page:

<script src="https://YOUR-HOST/widget.js"
        data-coins="bitcoin,ethereum"
        data-currency="usd"
        data-interval="30"></script>

All three data-* attributes are read at load time: data-coins (comma-separated CoinGecko IDs, max 20, from the allowlist), data-currency (e.g. usd, eur), and data-interval (poll seconds).

API

Method	Path	Response
GET	/	this page
GET	/widget.js	the embeddable widget script
GET	/api/rates?coins=&currency=	snake_case rates envelope (HTTP 200)
GET	/healthz	ok
GET	/api/healthz	ok

Rates are cached in-memory with a 30s TTL and served through a rate-limit resilient proxy. Data by CoinGecko.