Blockchair

Blockchair is an online cryptocurrency data aggregation platform that provides search, exploration, and analytics for multiple blockchains, including Bitcoin, Ethereum, Bitcoin Cash, Bitcoin SV, Litecoin, Dogecoin, Dash, Zcash, Ripple, Stellar, and NEO. The service was launched in 2017 as a way to address the fragmented nature of blockchain data by offering a unified interface for querying and visualizing transaction and address information across several major networks.

The Blockchair interface allows users to search by addresses, transactions, blocks, or mempool entries and presents results in a table format that includes details such as confirmations, fees, transaction sizes, and token balances. In addition to basic search, the platform offers advanced filters and parameters for more granular queries. Users can also explore blockchain statistics such as hashrate, difficulty, or price history with interactive charts.

Blockchair’s API provides access to raw blockchain data for developers. The RESTful endpoints support JSON responses and cover functions such as retrieving block details, transaction histories, and network metrics. The API includes rate limits and authentication for extensive usage.

Security and privacy are important aspects of Blockchair’s design. The service does not require any personal data or wallet credentials for general searches, and the API keys are tied to individual accounts to prevent abuse. Blockchair claims to comply with General Data Protection Regulation (GDPR) standards for its European users.

While the core service is free to use, Blockchair offers a paid premium tier that unlocks higher API request limits, extended search ranges, and additional analytical features. The platform is maintained by a Swedish software company and continues to expand its coverage to newly emerging cryptocurrencies and token standards.