Find the right API
Use search when the broad directory stops being enough. Filter by category, auth, CORS, signup friction, and result freshness until the shortlist becomes obvious.
Start with category and auth when you know the integration shape. Use free, signup, and CORS flags when you are trying to remove setup friction.
Sort by verification or response time when the final call is about reliability, not just category fit.
7 results after 1 active filters. Remove any one below without losing the rest of the cut.
Alchemy API
Alchemy is a Web3 dev platform — Ethereum/Polygon/Arbitrum/Optimism/Solana node access + enhanced APIs (NFT, Token, Transfer, etc.).
Dune Analytics API
Dune Analytics API lets developers programmatically execute SQL queries on indexed on-chain data for Ethereum / Polygon / Arbitrum / Solana / etc.
Etherscan API
Etherscan API provides Ethereum mainnet block explorer data — transaction history, token holdings, contract source code, internal transactions, ETH gas tracker.
Infura API
Infura is the veteran Ethereum node service provider (ConsenSys subsidiary) — JSON-RPC access, IPFS gateway, Filecoin, Polygon, and more.
Moralis API
Moralis is a Web3 dev platform — cross-chain Wallet API, NFT API, Token API, real-time data streams; positioned as "Web3 BaaS".
OpenSea API
OpenSea API provides data access to the world's largest NFT marketplace — collections, individual NFT details, listings, offers, transaction history, ownership.
The Graph (Subgraph) API
The Graph is a decentralized Web3 data indexing network — query blockchain data via GraphQL via subgraphs deployed by developers with various data schemas.