Price widgets & tickers
Show live price, market cap and 24-hour change for any asset.
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/quotes/assets
Build on the data behind CoinWorldCap
Assets, quotes, trending, exchanges, market totals, categories and chains. One base URL, one header, one response shape.
GET https://open-api.coinworldcap.com/openapi/v1/assetsUse cases
What you can build
Each use case maps to a small set of endpoints, so you only integrate what you need.
Portfolio trackers
Value holdings against current quotes and resolve coins by symbol or slug.
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/assets/quotes
Market dashboards
Headline totals, category and chain leaderboards, trending movers.
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/global/categories/chains/trending
Exchange directories
List venues with links, fees and 24-hour volume where available.
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/exchanges
Endpoints
View all APIsThe full API surface
GET
View all APIs/assetsAssetsThe asset catalogue: id, rank, name, symbol and slug, with links on request.Open docsGET/quotesQuotesLatest market data: price, market cap, volume and eight percent-change windows.Open docsGET/trendingTrendingUp to 20 assets with the largest 24-hour change, ranked. Not paginated.Open docsGET/exchangesExchangesThe exchange directory: name, links, fees and 24-hour volume where we have it.Open docsGET/globalGlobalMarket-wide totals: capitalisation, 24-hour volume and the 24-hour change.Open docsGET/categoriesCategoriesCategory leaderboard: market cap, volume, market share and the three biggest movers.Open docsGET/chainsChainsThe same leaderboard per blockchain, plus the EVM chain id and native-coin logo.Open docsFAQ
Questions, answered
Anything else? Email support@coinworldcap.com.
What is CoinWorldCap Developer?＋
A read-only HTTP API over the asset catalogue behind coinworldcap.com: assets, quotes, trending, exchanges, market totals, categories and chains, returned as JSON over HTTPS.
How do I get an API key?＋
Create a free CoinWorldCap account, then email support@coinworldcap.com with what your integration does and roughly how often it will call. The key is shown once and we store only its hash, so keep it somewhere safe.
How do I authenticate requests?＋
Send your key in the X-Api-Key header on every request. Without a usable key you get a 401, and the response code says whether the key is unknown, expired or revoked.
What are the rate limits?＋
Requests are limited per minute against your account, not per key. Over the limit you get a 429 with Retry-After in whole seconds.
How are numbers and times formatted?＋
Money and volumes arrive as decimal strings, never JSON numbers. Every timestamp is UTC.
Ready to build?