Cryptocurrency — entry 013 of 53
Blockfrost Cardano
Blockfrost is a hosted REST gateway to Cardano block and transaction data, authenticated with a project_id API key, that has grown beyond its original chain to also serve the Milkomeda EVM sidechain, IPFS pinning, and, since April 2026, a GraphQL API for Cardano's Midnight privacy sidechain. Its free Starter plan allows 50,000 requests a day with no card required, and official SDKs cover JavaScript, Python, Java, and Dart.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSON, GraphQLResponses can be requested as JSON or GraphQL.
GreatAPIs Score
Score81
Authentication15/25API key required
Pricing17/20Freemium tier available
Docs14/20Documentation URL provided
Formats15/15Supports 2 response formats
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/blockfrost-cardano/"><img src="https://greatapis.com/badge/blockfrost-cardano.svg" alt="Scored 81 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.