blockfrost Cardano

API

API for interacting with Cardano mainnet and testnets

Overview

Blockfrost Cardano API provides RESTful endpoints to access Cardano blockchain data—including blocks, transactions, addresses, assets (NFTs), staking details, metadata, and smart contract info—for mainnet and testnets (Preprod, Preview). Responses are in JSON format. Use cases include building wallets, NFT marketplaces, staking dashboards, analytics tools, dApp backends, or applications needing real-time/historical Cardano blockchain data integration.

Example Integration (JavaScript)

script.js JS


fetch('https://blockfrost.io/')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful endpoints
JSON response format
Cardano mainnet & testnet support
NFT/asset data access
Staking information
Metadata queries
Multi-language SDKs

Frequently Asked Questions

? Is blockfrost Cardano free to use?

Yes, Blockfrost offers a free tier with limited requests per minute/hour. Paid plans are available for higher usage limits, webhooks, and priority support.

? Does it require an API Key?

Yes, you must register an account on Blockfrost.io to obtain an API key for authenticating all API requests.

? What is the response format?

All API responses are in JSON format, ensuring compatibility with most programming languages and easy parsing.

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Tool Info

Pricing Freemium

Category Cryptocurrency

Platform Public API

Pros

⊕ Comprehensive Cardano data coverage
⊕ Easy integration with SDKs
⊕ Freemium pricing model
⊕ Real-time and historical data
⊕ Regular updates for new Cardano features

Cons

⊖ Requires API key authentication
⊖ Rate limits on free tier
⊖ Paid plans for high-volume usage
⊖ No SLA for free users