MELEK
Graphene social blockchain (Steem family) with a keyless condenser_api JSON-RPC
Blockchain · No auth · HTTPS
Blockchain APIs
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Ordered by reported HTTPS, CORS support, no-auth access, then changed/observed facts. Access signals are not a popularity or quality score.
ClearTrace
Cross-frontend DEX attribution and execution quality data across Ethereum and L2s
Blockchain · No auth · HTTPS
Get Started with Web3
Bilingual Web3 lessons, glossary search and role-based learning paths
Blockchain · No auth · HTTPS
TWZRD Agent Intel
Solana on-chain agent trust scoring via MCP; 4 free tools to score, resolve and verify AI agent wallets
Blockchain · No auth · HTTPS
Dwellir
RPC endpoints for 150+ blockchain networks, including Ethereum, Solana, Polkadot and Hyperliquid
Blockchain · API key · HTTPS
SwiftNodes
Multi-chain blockchain RPC nodes (Ethereum, Solana and 75+ networks)
Blockchain · API key · HTTPS
Bitquery
Onchain GraphQL APIs & DEX APIs
Blockchain · API key · HTTPS
Etherscan
Ethereum explorer API
Blockchain · API key · HTTPS
Chainlink
Build hybrid smart contracts with Chainlink
Blockchain · No auth · HTTPS
Chainpoint
Chainpoint is a global network for anchoring data to the Bitcoin blockchain
Blockchain · No auth · HTTPS
Helium
Helium is a global, distributed network of Hotspots that create public, long-range wireless coverage
Blockchain · No auth · HTTPS
Walltime
To retrieve Walltime's market info
Blockchain · No auth · HTTPS
Covalent
Multi-blockchain data aggregator platform
Blockchain · API key · HTTPS
Blockscout
Multichain block explorer REST API (with Etherscan-compatible JSON-RPC)
Blockchain · API key · HTTPS
Covalent
Multi-blockchain data aggregator platform
Blockchain · API key · HTTPS
Nownodes
Blockchain-as-a-service solution that provides high-quality connection via API
Blockchain · API key · HTTPS
The Graph
Indexing protocol for querying networks like Ethereum with GraphQL
Blockchain · API key · HTTPS
Watchdata
Provide simple and reliable API access to Ethereum blockchain
Blockchain · API key · HTTPS
Steem
Blockchain-based blogging and social media website
Blockchain · No auth · HTTPS not confirmed