Blockchain
18 in APIs and services, A to Z. The best-known ones are listed on APIs and services.
- Bitquery Onchain GraphQL APIs & DEX APIs
- Blockscout Multichain block explorer REST API (with Etherscan-compatible JSON-RPC)
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Chainlink Build hybrid smart contracts with Chainlink - Chainpoint Chainpoint is a global network for anchoring data to the Bitcoin blockchain
- ClearTrace Cross-frontend DEX attribution and execution quality data across Ethereum and L2s
- Covalent Multi-blockchain data aggregator platform
- Dwellir RPC endpoints for 150+ blockchain networks, including Ethereum, Solana, Polkadot and Hyperliquid
- Etherscan Ethereum explorer API
- Get Started with Web3 Bilingual Web3 lessons, glossary search and role-based learning paths
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Helium Helium is a global, distributed network of Hotspots that create public, long-range wireless coverage - MELEK Graphene social blockchain (Steem family) with a keyless condenser_api JSON-RPC
- Nownodes Blockchain-as-a-service solution that provides high-quality connection via API
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Steem Blockchain-based blogging and social media website - SwiftNodes Multi-chain blockchain RPC nodes (Ethereum, Solana and 75+ networks)
- The Graph Indexing protocol for querying networks like Ethereum with GraphQL
- TWZRD Agent Intel Solana on-chain agent trust scoring via MCP; 4 free tools to score, resolve and verify AI agent wallets
- Walltime To retrieve Walltime's market info
- Watchdata Provide simple and reliable API access to Ethereum blockchain